Refereed publications: -------------------------------------------------------------------------------- Hummel C.A., Schalinski C.J., Krichbaum T.P., Witzel A., Johnston K.J., 1988, A&A 204,68 "The quasar 0153+744" Witzel A., Schalinski C.J., Johnston K.J., Biermann P., Krichbaum T.P., Hummel C.A., Eckart A., 1988, A&A 206,245 "The occurence of bulk relativistic motion in compact radio sources" Eckart A., Hummel C.A., Witzel A., 1989, MNRAS 239,381 "Radio spectra of extragalactic sources and the relativistic beaming model" Quirrenbach A., Witzel A., Qian S.J., Krichbaum T., Hummel C.A., Alberdi A., 1989, A&A 226,L1 "Rapid radio polarization variability in the quasar 0917+624" Quirrenbach A., Witzel A., Krichbaum T., Hummel C.A., Alberdi A., Schalinski C., 1989, Nature 337,442 "Rapid variability of extragalactic radio sources" Krichbaum T.P., Hummel C.A., Quirrenbach A., Schalinski C.J., Witzel A., Johnston K.J., Muxlow T.W.B., Qian S.J., 1990, A&A 230,271 "The complex jet associated with the quasar 0836+71" Krichbaum T.P., Booth R.S., Kus A.J., Roennaeng B.O., Witzel A., Graham D.A., Pauliny-Toth I.I.K., Quirrenbach A., Hummel C.A., Alberdi A., Zensus J.A., Johnston K.J., Spencer J.H., Rogers A.E.E., Lawrence C.R., Readhead A.C.S., Hirabayashi H., Inoue M., Morimoto M., Dhawan V., Bartel N., Shapiro I.I., Burke B.F., Marcaide J.M., 1990, A&A 237,3 "43 GHz-VLBI observations of 3C273 after a flux density outburst in 1988" Qian S.J., Quirrenbach A., Witzel A., Krichbaum T.P., Hummel C.A., Zensus J.A., 1991, A&A 241,15 "A model for the rapid radio variability in the quasar 0917+624" Qian S.J., Witzel A., Krichbaum T., Quirrenbach A., Hummel C.A., Zensus J.A., 1992, Chin. Astron. Astrophys. (Acta Astron. Sin. 1991 32/4, 369-379) 16/2, 137 "Motion of knots in the superluminal source 3C 345" Hummel C.A., Schalinski C.J., Krichbaum T.P., Rioja M.J., Quirrenbach A., Witzel A., Muxlow T.W.B., Jonston K.J., Matveyenko L.I., Shevchenko A., 1992, A&A 257, 489 "The jets of quasar 1928+738: superluminal motion and large-scale structure" Quirrenbach A., Witzel A., Krichbaum T.P., Hummel C.A., Wegner R., Schalinski C.J., Ott M., Alberdi A., Rioja M., 1992, A&A 258,279 "Statistics of intraday variability in extragalactic radio sources" Krichbaum T.P., Witzel A., Graham D.A., Alef W., Pauliny-Toth I.I.K., Hummel C.A., Quirrenbach A., Inoue M., Hirabayashi H., Morimoto M., Rogers A.E.E., Zensus J.A., Lawrence C.R., Readhead A.C.S., Booth R.S., Roennaeng B.O., Kus A.J., Johnston K.J., Spencer J.H., Burke B.F., Dhawan V., Bartel N., Shapiro I.I., Alberdi A., Marcaide J.M., 1992, A&A 260, 33 "The evolution of the sub-parsec structure of 3C 84 at 43 GHz" Hummel C.A., Muxlow T.W.B., Krichbaum T.P., Quirrenbach A., Schalinski C.J., Witzel A., Johnston K.J., 1992, A&A 266, 93 "MERLIN and VLBI observations of the quasar 0836+710: Morphology of a parsec-kiloparsec scale jet" Armstrong J.T., Hummel C.A., Quirrenbach A., Buscher D.F., Mozurkewich D., Vivekanand M., Simon R.S., Denison C.S., Johnston K.J., Pan X.-P., Shao M., Colavita M.M., 1992, AJ 104, 2217 "The orbit of Phi Cygni measured with long-baseline optical interferometry: component masses and absolute magnitudes" Quirrenbach, A., Mozurkewich, D., Armstrong, J.T., Buscher, D.F., Hummel, C.A., 1993, ApJ 406, 215 "Angular diameter measurements of cool giant stars in strong TiO bands and in the continuum" Roos, N., Kaastra, J. S., Hummel, C.A., 1993, ApJ 409, 130 "A Massive Black Hole in 1928+738?" Quirrenbach A., Elias II N.M., Mozurkewich D., Armstrong J.T., Buscher D.F., Hummel C.A., 1993, AJ 106, 1118 "Observations of Nova Cygni 1992 with a Long-Baseline Interferometer" Quirrenbach A., Hummel C.A., Buscher D.F., Armstrong J.T., Mozurkewich D., Elias II N.M., 1993, ApJ 416, L25 "The asymmetric envelope of Gamma Cassiopeiae observed with the Mark III optical interferometer" Hummel C.A., Armstrong J.T., Quirrenbach A., Buscher D.F., Mozurkewich D., Simon R.S., Johnston K.J., 1993, AJ 106, 2486 "The spectroscopic binary Eta Andromedae: Determination of the orbit by optical interferometry" Hummel C.A., Mozurkewich D., Elias II N.M., Quirrenbach A., Buscher D.F., Armstrong J.T., Johnston K.J., Simon R.S., Hutter D., 1994, AJ 108, 326 "Four years of astrometric measurements with the Mark III optical interferometer" Also published in: Selected Papers on Long Baseline Stellar Interferometry, ed. by P.R. Lawson (SPIE Milestone Series 139), p.297 Hummel C.A., Armstrong J.T., Quirrenbach A., Buscher D.F., Mozurkewich D., Elias II N.M., Wilson R.E., 1994, AJ 107, 1859 "Very high precision orbit of Capella by long baseline interferometry" Quirrenbach A., Buscher D.F., Mozurkewich D., Hummel C.A., Armstrong J.T., 1994, A&A 283, L13 "Maximum-entropy maps of the Be shell star Zeta Tauri from optical long baseline interferometry" Ott M., Witzel A., Quirrenbach A., Krichbaum T.P., Standke K.J., Schalinski C.J., Hummel C.A., 1994, A&A 284, 331 "An updated list of radio flux density calibrators" Quirrenbach A., Mozurkewich D., Hummel C.A., Buscher D.F., Armstrong J.T., 1994, A&A 285, 541 "Angular diameters of the carbon stars UU Aur, Y CVn, and TX Psc from optical long-baseline interferometry" Quirrenbach A., Mozurkewich D., Buscher D.F., Hummel C.A., Armstrong J.T., 1994, A&A 286, 1019 "Phase-referenced visibility averaging in optical long-baseline interferometry" Buscher D.F., Armstrong J.T., Hummel C.A., Quirrenbach A., Mozurkewich D., Johnston K.J., Denison C.S., Colavita M.M., Shao M., 1995, Applied Optics, 34, 1081 "Interferometric seeing measurements on Mt. Wilson - power spectra and outer scales" Hummel C.A., Armstrong J.T., Buscher D.F., Mozurkewich D., Quirrenbach A., Vivekanand M., 1995, AJ 110, 376 "Orbits of small angular scale binaries resolved with the Mark III interferometer" Quirrenbach A., Mozurkewich D., Buscher D.F., Hummel C.A., Armstrong J.T., 1996, A&A 312, 160 "Angular diameter and limb darkening of Arcturus" Bennett P.D., Harper G.M., Brown A., Hummel C.A., 1996, ApJ 471, 454 "The masses and radii of the eclipsing binary Zeta Aurigae" Quirrenbach A., Bjorkman K.S., Bjorkman J.E., Hummel C.A., Buscher D.F., Armstrong J.T., Mozurkewich D., Elias II N.M., Babler B.L., 1997, ApJ 479, 477 "Constraints on the geometry of circumstellar envelopes: optical interferometric and spectropolarimetric observations of seven Be stars" Hummel C.A., Krichbaum T.P., Witzel A., Wuellner K.H., Steffen W., Alef W., Fey A., 1997, A&A 324, 857 "The radio jet of quasar 0153+744" Benson J.A., Hutter D.J., Elias II N.M., Bowers P.F., Johnston K.J., Hajian A.R., Armstrong J.T., Mozurkewich D., Pauls T.A., Rickard L.J, Hummel C.A., White N.M., Black D., Denison C.S., 1997, AJ 114, 1221 "Multichannel optical aperture synthesis imaging of Zeta 1 Ursae Majoris with the Navy Prototype Optical Interferometer" Hutter D.J., Elias II N.M., Peterson E.R., Weaver W.B., Weaver G., Mozurkewich D., Vrba F.J., Buscher D.F., Hummel C.A., 1997, AJ 114, 2822 "Seeing tests at four sites in support of the NPOI project" Hajian A.R., Armstrong J.T., Hummel C.A., Benson J.A., Mozurkewich D., Pauls T.A., Hutter D.J., Elias II N.M., Johnston K.J., Rickard L.J, White N.M., 1998, ApJ 496, 484 "Direct confirmation of stellar limb darkening with the Navy Prototype Optical Interferometer" Armstrong J.T., Mozurkewich D., Rickard L.J, Hutter D.J., Benson J.A., Bowers P.F., Elias II N.M., Hummel C.A., Johnston K.J., Buscher D.F., Clark III J.H., Ha L., Ling L.-C., White N.M., Simon R.S., 1998, ApJ 496, 550 "The Navy Prototype Optical Interferometer" Hummel C.A., Mozurkewich D., Armstrong J.T., Arsen R. Hajian, Elias N.M. II, Hutter D.J., 1998, AJ 116, 2536 "Navy Prototype Optical Interferometer observations of double stars Mizar A and Matar" Lobanov A.P., Krichbaum T.P., Witzel A., Kraus A., Zensus J.A., Britzen S., Otterbein K., Hummel C.A., Johnston K., 1998, A&A 340, 60 "VSOP imaging of S5 0836+710: a close-up on plasma instabilities in the jet" Hummel C.A., White N.M., Elias II N.M., Hajian A.R., Nordgren T.E., 2000, ApJL, 540, 91 "Zeta Orionis A is a Double Star" Nordgren T.E., Armstrong J.T., Germain M.E., Hindsley R.B., Hajian A.R., Sudol J.J., Hummel C.A., 2000, ApJ, 543, 972 "Astrophysical Quantities of Cepheid Variables Measured with the NPOI" Armstrong J.T., Nordgren T.E., Germain M.E., Hajian A.R., Hindsley R.B., Hummel C.A., Mozurkewich D., Thessin, R.N., 2001, AJ, 121, 476 "Diameters of Delta Cephei and Eta Aquilae Measured with the Navy Prototype Optical Interferometer" Hummel C.A., Carquillat J.-M., Ginestet N., Griffin R.F., Boden A.F., Hajian A.R., Mozurkewich D., Nordgren T.E., 2001, AJ, 121, 1623 "Orbital and stellar parameters of Omicron Leonis from spectroscopy and interferometry" Wittkowski, M., Hummel C.A., Johnston K.J., Mozurkewich D., Hajian A.R., White N.M., 2001, A&A, 377, 981 "Direct multi-wavelength limb-darkening measurements of three late-type giants with the Navy Prototype Optical Interferometer" Hummel C.A., Benson J.A., Hutter D.J., Johnston K.J., Mozurkewich D., Armstrong J.T., Hindsley R.B., Gilbreath G.C., Rickard L.J, White N.M., 2003, AJ, 125, 2630 "First observations with a co-phased six-station optical long-baseline array: application to the triple star Eta Virginis" Mozurkewich D., Armstrong J.T., Hindsley R.B., Quirrenbach A., Hummel C.A., Hutter D.J., Johnston K.J., Hajian A.R., Elias II N.M., Buscher D.F., Simon R.S., 2003, AJ, 126, 2502 "Angular diameters of stars from the Mark III optical interferometer" Johnston, K.J., Fey, A.L., Gaume, R.A., Hummel, C.A., Garrington, S., Muxlow, T., Thomasson, P., 2004, ApJ, 604, 65 "The Enigmatic Radio Source T Tauri S" Johnston, K. J., Fey, A. L., Gaume R. A., Claussen, M. J., Hummel, C. A., 2004, AJ, 128, 822 "Recent Observations of the Centimeter Radio Emission from the T Tauri System" Zwahlen N., North P., Debernardi Y., Eyer L., Galland F., Groenewegen M.A.T., Hummel C.A., 2004, A&A, 425, 45 "A purely geometric distance to the binary star Atlas, a member of the Pleiades" Harper G.M., Brown A., Bennett P.D., Baade R., Walder R., Hummel C.A., 2005, AJ, 129, 1018 "NRAO VLA observations of Zeta Aurigae: confirmation of the slow acceleration wind density structure" Boden, A.F., Torres, G., Hummel, C.A. 2005, ApJ, 627, 464 "Testing stellar models with an Improved Physical Orbit for 12 Bootis" Britzen S., Krichbaum T.P., Strom R.G., Witzel A., Muxlow T.W.B., Matveenko L.I., Campbell R.M., Alef W., Hummel C.A., Zensus A. 2005, A&A, 444, 443 "Large-scale motion, oscillations and a possible halo on the counter-jet side in 1803+784" Peterson, D.M., Hummel, C.A., Pauls, T.A., Armstrong, J.T., Benson, J.A., Gilbreath, C.G., Hindsley, R.B., Hutter, D.J., Johnston, K.J., Mozurkewich, D., Schmitt, H., 2006, ApJ, 636, 1087 "Resolving the effects of rotation in Altair with Long-Baseline Interferometry" Peterson, D.M., Hummel, C.A., Pauls, T.A., Armstron, J.T., Benson, J.A., Gilbreath, G.C., Hindsley, R.B., Hutter, D.J., Johnston, K.J., Mozurkewich, D., Schmitt, H.R. 2006, Nature, 440, 896 "Vega is a rapidly rotating star" Armstrong, J.T., Mozurkewich, D., Hajian, A.R., Johnston, K.J., Thessin, R.N., Peterson, D.M., Hummel, C.A., Gilbreath, G.C. 2006, AJ, 131, 2643 "The Hyades Binary Theta 2 Tauri: Confronting Evolutionary Models with Opticl Interferometry" Wittkowski, M., Hummel, C.A., Aufdenberg, J.P., Roccatagliata, V. 2006, A&A, 460, 843 "Tests of stellar model atmospheres by optical interferometry III. NPOI and VINCI interferometry of the M0 giant Gamma Sagittae covering 0.5-2.2 microns" Zavala, R.T., Adelman, S.J., Hummel, C.A., Gulliver, A.F., Caliskan, H., Armstrong, J.T., Hutter, D.J., Johnston, K.J., Pauls, T.A. 2007, ApJ, 655, 1046 "The Mercury-Manganese Binary Star Phi Herculis: Detection and Properties of the Secondary and Revision of the Elemental Abundances of the Primary" Chesneau, O., Nardetto, N., Millour, F., Hummel, C., Domiciano de Souza, A., Bonneau, D., Vannier, M., Rantakyro, F., Spang, A., Malbet, F. et al. 2007, A&A, 464 119 "AMBER/VLTI interferometric observations of the recurrent Nova RS Ophiuchii 5.5 days after outburst" Patience, J., Zavala, R.T., Prato, L., Franz, O., Wasserman, L., Tycner, C., Hutter, D.J., Hummel, C.A. 2007, ApJL, 674, 97 "Optical Interferometric Observations of Theta 1 Orionis C from NPOI and Implications for the System Orbit" Hummel, C.A. 2008, NewAR, 52, 167 "Theory of interferometric data processing" Chesneau, O., Banerjee, D.P.K., Millour, F., Nardetto, N., Sacuto, S., Spang, A., Wittkowski, M., Ashok, N.M., Das, R.K., Hummel, C., Kraus, S., Lagadec, E., Morel, S., Petr-Gotzens, M., Rantakyro, F., Schoeller, M. 2008, A&A, 487, 223 "VLTI monitoring of the dust formation event of the Nova V1280 Scorpii" Chesneau, O., Clayton, G.C., Lykou, F., De Marco, O., Hummel, C.A., Kerber, F., Lagadec, E., Nordhaus, J., Zijlstra, A.A., Evans, A. 2009, A&A, 493, 17 "A dense dusty disk around the born-again Sakurai's object" Schegerer, A.A., Wolf, S., Hummel, C.A., Quanz, S.P., Richichi, A. 2009, A&A, 502, 367 "Tracing the potential planet-forming regions around seven pre-main sequence stars" Stefl, S., Rivinius, Th., Carciofi, A.C., le Bouquin, J-B., Baade, D., Bjorkman, K.S., Hesselbach, E., Hummel, C.A., Okazaki, A.T., Pollmann, E., Rantakyro, F., Wisniewski, J.P. 2009, A&A, 504, 929 "Cyclic variability of the circumstellar disc of the Be star Zeta Tau. I. Long-Term monitoring observations" Carciofi, A.C., Okazaki, A.T., Le Bouquin, J-B., Stefl, S., Rivinius, Th., Baade, D., Bjorkman, J.E., Hummel, C.A. 2009, A&A, 504, 915 "Cyclic variability of the circumstellar disc of the Be star Zeta Tau. II. Testing the 2D global disc oscillation model" Driebe, T., Groh, J.H., Hofmann, K.-H., Ohnaka, K., Kraus, S., Millour, F., Murakawa, K., Schertl, D., Weigelt, G., Petrov, R., Wittkowski, M., Hummel, C.A., Le Bouquin, J.B., Merand, A., Schoeller, M., Massi, F., Stee, P., Tatulli, E. 2009, A&A, 507, 301 "Resolving the asymmetric inner wind region of the yellow hypergiant IRC+10420 with VLTI/AMBER in low and high spectral resolution mode" Zavala, R. T., Hummel, C. A., Boboltz, D. A., Ojha, R., Shaffer, D. B., Tycner, C., Richards, M. T., Hutter, D. J. 2010, ApJ, 715, 44 "The Algol Triple System Spatially Resolved at Optical Wavelengths" Koubsky, P., Hummel, C. A., Harmanec, P., Tycner, C., van Leeuwen, F., Yang, S., Slechta, M., Bozic, H., Zavala, R. T., Ruzdjak, D., Sudar, D. 2010, A&A, 517, 24 "Properties and nature of Be stars 28. Implications of systematic observations for the nature of the multiple system with the Be star o Cassiopaeiae and its circumstellar environment" Vehoff, S., Hummel, C. A., Monnier, J. D., Tuthill, P., Nuernberger, D. E. A., Siebenmorgen, R., Chesneau, O., Duschl, W. J. 2010, A&A, 520, A78 "Mid-infrared interferometry of the massive young stellar object NGC3603 - IRS9A" Tycner, C., Ames, A., Zavala, R. T., Hummel, C. A., Benson, J. A., Hutter, D. J. 2011, ApJ, 729, 5 "The Revised Orbit of the delta Sco System" Stelzer, B., Hummel, C. A., Schöller, M., Hubrig, S., Cowley, C. 2011, A&A, 529, 29 "Search of X-ray emission from roAp stars: the case of gamma Equulei" Sánchez-Monge, Á., Cesaroni, R., Beltrán, M. T., Kumar, M. S. N., Stanke, T., Zinnecker, H., Etoka, S., Galli, D., Hummel, C. A., et al. 2013, A&A, 552, 10 "A candidate circumbinary Keplerian disk in G35.20-0.74 N: A study with ALMA" Hummel, C. A., Rivinius, Th., Nieva, M.-F., Stahl, O., van Belle, G., Zavala, R. T. 2013, A&A, 554, 52 "Dynamical mass of the O-type supergiant in zeta Orionis A" Sanchez-Bermudez, J., Schödel, R., Alberdi, A., Barbá, R. H., Hummel, C. A., Maíz Apellániz, J., Pott, J.-U. 2013, A&A, 554, 4 "Direct detection of the tertiary component in the massive multiple HD 150136 with VLTI" Hillen, M., Verhoelst, T., Van Winckel, H., Chesneau, O., Hummel, C. A., et al. 2013, A&A, 559, 111 "An interferometric study of the post-AGB binary 89 Herculis. I. Spatially resolving the continuum circumstellar environment at optical and near-IR wavelengths with the VLTI, NPOI, IOTA, PTI, and the CHARA Array" Sanchez-Bermudez, J., Schödel, R., Alberdi, A., Muzic, K., Hummel, C. A., Pott, J.-U. 2014, A&A, 567, 21 "Properties of bow-shock sources at the Galactic center" Sanchez-Bermudez, J., Alberdi, A., Schödel, R., Hummel, C. A., Arias, J. I., Barba, R. H., Maiz Apellaniz, Pott, J.-U. 2014, A&A, 572, 1 "Resolving the stellar components of the massive multiple system Herschel 36 with AMBER/VLTI" Wang, X., Hummel, C. A., Ren, S., Yanning, F. 2015, AJ, 149, 110 "The Three-dimensional Orbit and Physical Parameters of 47 Oph" Hummel, C. A., Stanke, T., Galvan-Madrid, R., Koribalski, B. S. 2015, A&A, 582, 66 "Massive envelopes and filaments in the NGC 3603 star forming region" Muterspaugh, M. W., Wijngaarden, M. J. P., Henrichs, H. F., Lane, B. F., Hartkopf, W. I., Henry, G. W., Schaefer, G. H., Farrington, C., Hummel, C. A., Zavala, R. T. 2015, AJ, 150, 140 "Predicting Alpha Comae Berenices time of eclipse: how 3 ambiguous measurements out of 609 caused a 26 year binary's eclipse to be missed" Sanchez-Bermudez, J., Hummel, C. A., Tuthill, P., Alberdi, A., Schödel, R., Lacour, S., Stanke, T. 2016, A&A, 588, 117 "Unveiling the near-infrared structure of the massive-young stellar object NGC 3603 IRS 9A with sparse aperture masking and spectroastrometry" Nemravova, J.A., Harmanec, P., Broz, M., Vokrouhlicky, D., Mourard, D., Hummel, C.A., Cameron, C., Matthews, J.M., Bolton, C.T., Bozic, H., Chini, R., Dembsky, T., Engle, S., Farrington, C., Grunhut, J.H., Guenther, D.B., Guinan, E.F., Korcakova, D., Koubsky, P., Kricek, R., Kuschnig, R., Mayer, P., McCook, G.P., Moffat, A.F.J., Nardetto, N., Prsa, A., Ribeiro, J., Rowe, J., Rucinski, S., Skoda, P., Slechta, M., Tallon-Bosc, I., Votruba, V., Weiss, W.W., Wolf, M., Zasche, P., and Zavala, R.T. 2016, A&A, 594, A55 "Ksi Tauri: a unique laboratory to study the dynamic interaction in a compact hierarchical quadruple system" Weigelt G., et al. 2016, A&A, 594, 106 "VLTI-AMBER velocity-resolved aperture-synthesis imaging of η Carinae with a spectral resolution of 12 000. Studies of the primary star wind and innermost wind-wind collision zone" Hutter D.J., Zavala R.T., Tycner C., Benson J.A., Hummel C.A., Sanborn J., Franz O.G., Johnston K.J. 2016, ApJS, 227, 4 "Surveying the Bright Stars by Optical Interferometry. I. A Search for Multiplicity among Stars of Spectral Types F-K" Schaefer G.H., Hummel C.A., Gies D.R., Zavala R.T., Monnier J.D., Walter F.M., Turner N.H., Baron F., ten Brummelaar T., Che X., Farrington C.D., Kraus S., Sturmann J., Sturmann L. 2016, AJ, 152, 213 "Orbits, Distance, and Stellar Masses of the Massive Triple Star Sigma Orionis" Hummel C.A., Schoeller M., Duvert G., Hubrig S. 2017, A&A, 600, L5 "Orbit of the mercury-manganese binary 41 Eridani" Hummel C.A., Monnier J.D., Roettenbacher R.M., Torres G., Henry G.W., Korhonen H., Beasley A., Schaefer G.H., Turner N.H., ten Brummelaar T., Farrington C.D., Sturmann J., Sturmann L., Baron F., Kraus S. 2017, ApJ, 844, 115 "Orbital elements and stellar parameters of the active binary UX Arietis" Sanchez-Bermudez J., Alberdi A., Barba R., Bestenlehner J.M., Cantalloube F., Brandner W., Henning Th., Hummel C.A., Maiz Apellaniz J., Pott J.-U., Schoedel R., van Boekel R. 2017, ApJ, 845, 57S "GRAVITY spectro-interferometric study of the massive multiple stellar system HD 93206 A" Garcia Lopez, R., et al., 2018, A&A, 608, A78 "The wind and the magnetospheric accretion onto the T Tauri star S Coronae Australis at sub-au resolution" Jaervinen S.P., Carroll T.A., Hubrig S., Ilyin I., Schoeller M., Castelli F., Hummel C.A., et al., 2018, ApJ, 858, 18 "Weak Magnetic Fields in Two Herbig Ae Systems: The SB2 AK Sco and the Presumed Binary HD 95881" Sanchez-Bermudez J., Weigelt G., Bestenlehner J.M., Kervella P., et al., 2019, A&A, 618, A125 "GRAVITY chromatic imaging of Eta Carinas core" Sanchez-Bermudez J., Alberdi A., Schoedel R., Brandner W., Galvan-Madrid R., Guirado J.C., Herrero-Illana R. Hummel C.A., Marcaide J.M., Perez-Torres M.A., 2019, A&A, 624, A55 "A VLBI study of the wind-wind collision region in the massive multiple HD 167971" Hutter D.J., Tycner C., Zavala R.T., Benson J.A., Hummel C.A., Sanborn J., 2019, ApJS, 243, 32 "Surveying the Bright Stars by Optical Interferometry. II. A Volume-limited Multiplicity Survey of Main-sequence F Stars" Sanchez-Bermudez J., Diaz-Lopez, J., Hummel C.A., et al., 2020, submitted, "Astrometric orbit of the very young massive system Herschel 36A resolved with AMBER-VLTI" Hubrig S., Jaervinn S.P., Schoeller M., et al., 2019 MNRAS, 491, 281 "The very slow rotation of the magnetic O9.7 V star HD 54879" Jaervinen S.P., Chojnovski S.D., Gonzalez J.F., et al., 2020, RNAAS 4, 11 "Potential Detection of Secular Evolution of Chemical Abundances on the Surface of the HgMn Primary in the Triple System Chi Lup" Schoeller M., Hummel C.A., Hubrig S., Kurtz D.W., Mathys G., Robrade J., Jaervinen S.P., 2020, A&A, 642, 188S "The near-infrared companion to HD 94660" Weigelt et al., 2021, A&A, 652, 140W "VLTI-MATISSE chromatic aperture-synthesis imaging of Eta Carinae’s stellar wind across the Br-alpha line. Periastron passage observations in February 2020" Kokoulina E., et al., 2021, A&A, 652, 61K "First MATISSE L-band observations of HD 179218. Is the inner 10 AU region rich in carbon dust particles?" Hutter D.J., Tycner C., Zavala R.T., Benson J.A., Hummel C.A., Zirm H. 2021, ApJS, 257, 69 "Surveying the Bright Stars by Optical Interferometry. III. A Magnitude-limited Multiplicity Survey of Classical Be Stars" Pavlovski K., Hummel C.A. Tkachenko A., Dervisolglu A., Kayhan C., Zavala R.T., Hutter D.J., Tycner C., Sahin T., Audenaert J., Baeyens R., Bodensteiner J., Bowman D.M., Gebruers S., Jannsen N.E., Momberg J.S.G., 2022, A&A, 658, 92 "Dynamical parallax, physical parameters, and evolutionary status of the components of the bright eclisping binary Alpha Draconis" Lopez, B., Lagarde, S., Petrov R.G., et al., 2022, A&A, 659, 192 "MATISSE, the VLTI mid-infrared imaging spectro-interferometer Jaervinen S.P., Hubrig S., Schoeller M., Cikota A., Ilyin L., Hummel C.A., Kueker M., 2022, MNRAS, 510, 4405 "Detection of anomalous element distribution in the extremely slowly rotating magnetic O9.7 star HD 54879" Sanchez-Bermudez J., Hummel C.A., Diaz-Lopez J., Alberdi A., Schoedel R., Aria J.I., Barba R.H., Bastida-Escamilla E., Brandnr W., Maiz Apellaniz J., Pott J.U., 2022, MNRAS, 514, 1162 "The outer orbit of the high-mass stellar triple system Herschel 36 determined with the VLTI" Niemczura E., Walczak P., Mikolajczyk P., Schoeller M., Hummel C.A., Hubrig S., Rozanski T., MNRAS 514, 5640 "Seismic modelling of the pulsating mercury-manganese star HD 29589" Chojnowski S. Drew, Hubrig S., Labadie-Bartz J., Rivinius, Th. Schöller, M. Niemczura E., Nidever David L., Stutz A. M., Hummel, C. A., MNRAS 516, 2812C "Trumpler 16-26: a new centrifugal magnetosphere star discovered via SDSS/APOGEE H-band spectroscopy"