Nebulae near the hot binary star BAT99-49 in the LMC
The nebula around the hot double star BAT99-49 in the Large Magellanic Cloud (LMC), obtained in January 2002 with the FORS1 multi-mode instrument at the 8.2-m VLT MELIPAL telescope at the Paranal Observatory (Chile). It is based on three exposures through narrow-band optical (interference) filters that isolate the light from specific atoms and ions. In this rendering, the blue colour represents the light from singly ionized Helium (He II; wavelength 468.6 nm; exposure time 45 min), green corresponds to doubly ionized oxygen ([O III]; 495.7 + 500.7 nm; 5 min) and red to hydrogen atoms (H; H-alpha line at 656.2 nm; 5 min). Of these three ions, He II is the tracer of high excitation, i.e. the bluest areas of the nebula are the hottest. The sky field measures 400 x 400 square arcsec ; the original pixel size on the 2k x 2k CCD is 0.23 arcsec. North is up and east to the left.
Oikeudet:ESO
Kuvasta
Tunnistus: | eso0310c |
Tyyppi: | Havainto |
Julkaisupäivä: | 9. huhtikuuta 2003 |
Vastaavat julkaisut: | eso0310 |
Koko: | 1914 x 1917 px |
Kohteesta
Nimi: | BAT99-49 |
Tyyppi: | Local Universe : Nebula |
Etäisyys: | 180000 valovuotta |
Constellation: | Mensa |
Kategoria: | Nebulae |
Koordinaatit
Position (RA): | 5 29 33.72 |
Position (Dec): | -70° 59' 26.94" |
Field of view: | 6.64 x 6.64 arcminutes |
Suuntaus: | Pohjoinen on 0.1° oikea pystysuuntaan nähden |
Värit ja suotimet
Kaista | Aallonpituus | Teleskooppi |
---|---|---|
Optinen Heii | 468 nm | Very Large Telescope FORS1 |
Optinen Oiii | 500 nm | Very Large Telescope FORS1 |
Optinen Oiii | 495 nm | Very Large Telescope FORS1 |
Optinen H-alpha | 656 nm | Very Large Telescope FORS1 |