MIDI SD/SXCen_HD52961

Abstract

Binary post-AGBs

In recent years, it became clear that among post-AGB candidate stars,binarity is a widespread phenomenon. These binary post-AGB stars havedistinct characteristics which include a broad IR excess, oftenstarting at H or K, pointing to the presence of both hot and cool dustin a disc geometry around the central object, which is typically ofspectral type F or G. There is also growing observational evidencethat the dusty discs are remarkable stable: mixed chemistry is oftenobserved, showing that the formation of the O-rich disc antedated themore recent C-rich transition of the central object. Kinematicalinformation of several objects by CO detections, confirms the presenceof a Keplerian circumbinary disc. Also the dust grain evolution inthose discs is rather different than in outflows with typically ahigher crystallisation fraction. Several objects show evidence forlarge grains and even macroscopic structures weredetected. Coagulation seems to be very efficient: the dustprocessingseems to be very similar as in the protoplanetary discs around youngstellar objects.Although the observational evidence for the presence of a circumbinarydisc is well established, its actual structure but also its formation,stability and evolution remain largely unknown. Moreover, the disc mayhave important dynamical interaction with the binary itself: it maypump up the orbital excentricity which would explain the remarkablehigh eccentricities observed.

Table 1: MIDI Science Demonstration Data

Package Description
File List View all files in the package
MIDI.SDT.073.A-9002(A) MIDI Science Demonstration Data (SXCEN.HD52961) (162 files)

Files Description for HD 52961, SX Cen (post-AGB), and associated calibrators: HD 67852, HD 49161, HD 107446, HD 120404

       File Name                   Target  Science/Calibrator   Category
MIDI.2004-02-10T02:12:24.750.fits HD52961 SACQUISTION
MIDI.2004-02-10T02:15:16.000.fits HD52961 SFRINGE_SEARCH
MIDI.2004-02-10T02:16:16.266.fits HD52961 SFRINGE_SEARCH
MIDI.2004-02-10T02:17:16.532.fits HD52961 SFRINGE_SEARCH
MIDI.2004-02-10T02:20:02.000.fits HD52961 SFRINGE_TRACK
MIDI.2004-02-10T02:21:02.266.fits HD52961 SFRINGE_TRACK
MIDI.2004-02-10T02:22:02.532.fits HD52961 SFRINGE_TRACK
MIDI.2004-02-10T02:23:02.798.fits HD52961 S FRINGE_TRACK
MIDI.2004-02-10T02:24:03.065.fits HD52961 S FRINGE_TRACK
MIDI.2004-02-10T02:25:03.330.fits HD52961 SFRINGE_TRACK
MIDI.2004-02-10T02:29:23.750.fits HD52961 SPHOTO_A
MIDI.2004-02-10T02:30:45.750.fits HD52961 SPHOTO_B
MIDI.2004-02-10T02:39:14.250.fits HD49161 CACQUISITION
MIDI.2004-02-10T02:42:16.000.fits HD49161 CFRINGE_SEARCH
MIDI.2004-02-10T02:43:09.149.fits HD49161 CFRINGE_SEARCH
MIDI.2004-02-10T02:45:52.000.fits HD49161 CFRINGE_TRACK
MIDI.2004-02-10T02:46:52.266.fits HD49161 CFRINGE_TRACK
MIDI.2004-02-10T02:47:52.532.fits HD49161 CFRINGE_TRACK
MIDI.2004-02-10T02:48:52.798.fits HD49161 CFRINGE_TRACK
MIDI.2004-02-10T02:49:53.064.fits HD49161 CFRINGE_TRACK
MIDI.2004-02-10T02:50:53.331.fits HD49161 CFRINGE_TRACK
MIDI.2004-02-10T02:54:13.250.fits HD49161 CPHOTO_A
MIDI.2004-02-10T02:55:39.250.fits HD49161 CPHOTO_B
MIDI.2004-02-10T07:30:08.750.fits SXCEN SACQUISITION
MIDI.2004-02-10T07:32:27.000.fits SXCEN SFRINGE_SEARCH
MIDI.2004-02-10T07:33:27.181.fits SXCEN SFRINGE_SEARCH
MIDI.2004-02-10T07:34:27.363.fits SXCEN SFRINGE_SEARCH
MIDI.2004-02-10T07:35:27.544.fits SXCEN SFRINGE_SEARCH
MIDI.2004-02-10T07:37:52.000.fits SXCEN SFRINGE_TRACK
MIDI.2004-02-10T07:38:52.182.fits SXCEN SFRINGE_TRACK
MIDI.2004-02-10T07:39:52.363.fits SXCEN SFRINGE_TRACK
MIDI.2004-02-10T07:40:52.545.fits SXCEN SFRINGE_TRACK
MIDI.2004-02-10T07:49:57.750.fits SXCEN SPHOTO_A
MIDI.2004-02-10T07:51:23.750.fits SXCEN SPHOTO_B
MIDI.2004-02-10T07:08:04.250.fits HD67582 CACQUISITION
MIDI.2004-02-10T07:10:21.000.fits HD67582 CFRINGE_SEARCH
MIDI.2004-02-10T07:11:14.074.fits HD67582 CFRINGE_SEARCH
MIDI.2004-02-10T07:13:39.075.fits HD67582 CFRINGE_TRACK
MIDI.2004-02-10T07:14:32.074.fits HD67582 CFRINGE_TRACK
MIDI.2004-02-10T07:15:25.147.fits HD67582 CFRINGE_TRACK
MIDI.2004-02-10T07:18:52.750.fits HD67582 CPHOTO_A
MIDI.2004-02-10T07:20:17.750.fits HD67582 CPHOTO_B
MIDI.2004-02-11T08:32:04.417.fits HD144432 SACQUISITION
MIDI.2004-02-11T08:33:14.750.fits HD144432 S ACQUISITION
MIDI.2004-02-11T08:34:08.250.fits HD144432 S ACQUISITION
MIDI.2004-02-11T08:35:24.250.fits HD144432 SACQUISITION
MIDI.2004-02-11T08:36:32.250.fits HD144432 S ACQUISITION
MIDI.2004-02-11T08:38:48.250.fits HD144432 SACQUISITION
MIDI.2004-02-11T08:44:38.750.fits HD144432 S ACQUISITION
MIDI.2004-02-11T08:45:36.250.fits HD144432 SACQUISITION
MIDI.2004-02-11T08:46:34.250.fits HD144432 SACQUISITION
MIDI.2004-02-11T08:49:36.000.fits HD144432 S FRINGE_SEARCH
MIDI.2004-02-11T08:52:25.000.fits HD144432 SFRINGE_TRACK
MIDI.2004-02-11T08:53:43.865.fits HD144432 S FRINGE_TRACK
MIDI.2004-02-11T08:55:02.729.fits HD144432 S FRINGE_TRACK
MIDI.2004-02-11T08:56:21.593.fits HD144432 S FRINGE_TRACK
MIDI.2004-02-11T08:57:40.457.fits HD144432 SFRINGE_TRACK
MIDI.2004-02-11T09:01:27.750.fits HD144432 SPHOTO_A
MIDI.2004-02-11T09:03:26.250.fits HD144432 SPHOTO_B
MIDI.2004-02-11T09:11:07.750.fits HD161892 CACQUISITION
MIDI.2004-02-11T09:12:18.250.fits HD161892 C ACQUISITION
MIDI.2004-02-11T09:13:12.750.fits HD161892 CACQUISITION
MIDI.2004-02-11T09:16:21.000.fits HD161892 C FRINGE_SEARCH
MIDI.2004-02-11T09:19:06.000.fits HD161892 C FRINGE_TRACK
MIDI.2004-02-11T09:20:24.864.fits HD161892 C FRINGE_TRACK
MIDI.2004-02-11T09:21:43.728.fits HD161892 CFRINGE_TRACK
MIDI.2004-02-11T09:23:02.593.fits HD161892 CFRINGE_TRACK
MIDI.2004-02-11T09:24:21.457.fits HD161892 CFRINGE_TRACK
MIDI.2004-02-11T09:27:59.250.fits HD161892 CPHOTO_A
MIDI.2004-02-11T09:30:05.750.fits HD161892 C PHOTO_B
MIDI.2004-02-11T04:02:03.250.fits HD52961 SACQUISITION
MIDI.2004-02-11T04:03:11.750.fits HD52961 SACQUISITION
MIDI.2004-02-11T04:04:17.750.fits HD52961 SACQUISITION
MIDI.2004-02-11T04:05:58.250.fitS HD52961 SACQUISITION
MIDI.2004-02-11T04:08:32.000.fits HD52961 SFRINGE_SEARCH
MIDI.2004-02-11T04:09:32.182.fits HD52961 SFRINGE_SEARCH
MIDI.2004-02-11T04:10:32.363.fits HD52961 SFRINGE_SEARCH
MIDI.2004-02-11T04:13:04.000.fits HD52961 SFRINGE_TRACK
MIDI.2004-02-11T04:14:04.165.fits HD52961 SFRINGE_TRACK
MIDI.2004-02-11T04:15:04.346.fits HD52961 SFRINGE_TRACK
MIDI.2004-02-11T04:16:04.528.fits HD52961 SFRINGE_TRACK
MIDI.2004-02-11T04:19:08.250.fits HD52961 SPHOTO_A
MIDI.2004-02-11T04:20:27.250.fits HD52961 SPHOTO_B
MIDI.2004-02-11T03:33:56.250.fits HD67582 CACQUISITION
MIDI.2004-02-11T03:35:04.250.fits HD67582 CACQUISITION
MIDI.2004-02-11T03:38:38.250.fits HD67582 C ACQUISITION
MIDI.2004-02-11T03:39:29.250.fits HD67582 CACQUISITION
MIDI.2004-02-11T03:43:01.000.fits HD67582 CFRINGE_SEARCH
MIDI.2004-02-11T03:43:54.074.fits HD67582 CFRINGE_SEARCH
MIDI.2004-02-11T03:46:12.000.fits HD67582 CFRINGE_TRACK
MIDI.2004-02-11T03:47:05.074.fits HD67582 CFRINGE_TRACK
MIDI.2004-02-11T03:47:58.147.fits HD67582 CFRINGE_TRACK
MIDI.2004-02-11T03:48:51.221.fits HD67582 CFRINGE_TRACK
MIDI.2004-02-11T03:52:37.750.fits HD67582 CPHOTO_A
MIDI.2004-02-11T03:53:51.750.fits HD67582 CPHOTO_B
MIDI.2004-02-11T07:31:01.250.fits SXCEN SACQUISITION
MIDI.2004-02-11T07:32:20.750.fits SXCEN SACQUISITION
MIDI.2004-02-11T07:33:15.750.fits SXCEN SACQUISITION
MIDI.2004-02-11T07:35:35.000.fits SXCEN SFRINGE_SEARCH
MIDI.2004-02-11T07:37:59.000.fits SXCEN SFRINGE_TRACK
MIDI.2004-02-11T07:38:52.074.fits SXCEN SFRINGE_TRACK
MIDI.2004-02-11T07:39:45.147.fits SXCEN S FRINGE_TRACK
MIDI.2004-02-11T07:40:38.221.fits SXCEN SFRINGE_TRACK
MIDI.2004-02-11T07:45:12.250.fits SXCEN SPHOTO_A
MIDI.2004-02-11T07:46:31.750.fits SXCEN SPHOTO_B
MIDI.2004-02-11T08:07:07.750.fits HD107446 CACQUISITION
MIDI.2004-02-11T08:08:09.750.fits HD107446 CACQUISITION
MIDI.2004-02-11T08:09:08.250.fits HD107446 CACQUISITION
MIDI.2004-02-11T08:09:57.250.fits HD107446 CACQUISITION
MIDI.2004-02-11T08:14:30.000.fits HD107446 CFRINGE_SEARCH
MIDI.2004-02-11T08:16:44.000.fits HD107446 CFRINGE_TRACK
MIDI.2004-02-11T08:17:37.073.fits HD107446 CFRINGE_TRACK
MIDI.2004-02-11T08:18:30.147.fits HD107446 CFRINGE_TRACK
MIDI.2004-02-11T08:19:23.221.fits HD107446 CFRINGE_TRACK
MIDI.2004-02-11T08:23:28.750.fits HD107446 CPHOTO_A
MIDI.2004-02-11T08:24:48.750.fits HD107446 CPHOTO_B
MIDI.2004-02-12T09:49:17.250.fits HD144432 SACQUISITION
MIDI.2004-02-12T09:50:18.250.fits HD144432 SACQUISITION
MIDI.2004-02-12T09:51:28.250.fits HD144432 SACQUISITION
MIDI.2004-02-12T09:54:28.000.fits HD144432 SFRINGE_SEARCH
MIDI.2004-02-12T09:56:45.000.fits HD144432 SFRINGE_TRACK
MIDI.2004-02-12T09:58:03.864.fits HD144432 S FRINGE_TRACK
MIDI.2004-02-12T09:59:22.695.fits HD144432 S FRINGE_TRACK
MIDI.2004-02-12T10:00:41.560.fits HD144432 SFRINGE_TRACK
MIDI.2004-02-12T10:04:02.250.fits HD144432 SPHOTO_A
MIDI.2004-02-12T10:05:49.250.fits HD144432 SPHOTO_B
MIDI.2004-02-12T09:18:57.250.fits HD161892 CACQUISITION
MIDI.2004-02-12T09:20:14.250.fits HD161892 CACQUISITION
MIDI.2004-02-12T09:22:09.250.fits HD161892 C ACQUISITION
MIDI.2004-02-12T09:23:10.750.fits HD161892 CACQUISITION
MIDI.2004-02-12T09:26:21.000.fits HD161892 CFRINGE_SEARCH
MIDI.2004-02-12T09:26:56.664.fits HD161892 CFRINGE_SEARCH
MIDI.2004-02-12T09:29:31.000.fits HD161892 CFRINGE_TRACK
MIDI.2004-02-12T09:30:49.832.fits HD161892 C FRINGE_TRACK
MIDI.2004-02-12T09:32:08.696.fits HD161892 C FRINGE_TRACK
MIDI.2004-02-12T09:33:27.560.fits HD161892 C FRINGE_TRACK
MIDI.2004-02-12T09:34:46.424.fits HD161892 CFRINGE_TRACK
MIDI.2004-02-12T09:38:26.750.fits HD161892 CPHOTO_A
MIDI.2004-02-12T09:40:36.750.fits HD161892 CPHOTO_B
MIDI.2004-02-12T07:55:05.750.fits SXCEN SACQUISITION
MIDI.2004-02-12T07:56:30.750.fits SXCEN SACQUISITION
MIDI.2004-02-12T07:57:57.750.fits SXCEN SACQUISITION
MIDI.2004-02-12T08:00:33.000.fits SXCEN SFRINGE_SEARCH
MIDI.2004-02-12T08:01:26.059.fits SXCEN SFRINGE_SEARCH
MIDI.2004-02-12T08:03:25.000.fits SXCEN SFRINGE_TRACK
MIDI.2004-02-12T08:04:18.074.fits SXCEN SFRINGE_TRACK
MIDI.2004-02-12T08:05:11.148.fits SXCEN S FRINGE_TRACK
MIDI.2004-02-12T08:06:04.222.fits SXCEN SFRINGE_TRACK
MIDI.2004-02-12T08:09:57.250.fits SXCEN SPHOTO_A
MIDI.2004-02-12T08:11:19.750.fits SXCEN SPHOTO_B
MIDI.2004-02-12T07:27:06.750.fits HD120404 CACQUISITION
MIDI.2004-02-12T07:28:16.750.fits HD120404 CACQUISITION
MIDI.2004-02-12T07:29:15.750.fits HD120404 C ACQUISITION
MIDI.2004-02-12T07:30:16.250.fits HD120404 CACQUISITION
MIDI.2004-02-12T07:33:12.000.fits HD120404 CFRINGE_SEARCH
MIDI.2004-02-12T07:34:05.149.fits HD120404 CFRINGE_SEARCH
MIDI.2004-02-12T07:36:34.000.fits HD120404 CFRINGE_TRACK
MIDI.2004-02-12T07:37:27.149.fits HD120404 C FRINGE_TRACK
MIDI.2004-02-12T07:38:20.295.fits HD120404 C FRINGE_TRACK
MIDI.2004-02-12T07:39:13.446.fits HD120404 CFRINGE_TRACK
MIDI.2004-02-12T07:43:27.250.fits HD120404 CPHOTO_A
MIDI.2004-02-12T07:44:44.250.fits HD120404 CPHOTO_B