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.
Kredit:ESO
O snímku
Id: | eso0310c |
Typ: | Pozorování |
Datum zveřejnění: | 9. dubna 2003 |
Související články: | eso0310 |
Velikost: | 1914 x 1917 px |
O objektu
Jméno: | BAT99-49 |
Typ: | Local Universe : Nebula |
Vzdálenost: | 180000 světelné roky |
Constellation: | Mensa |
Kategorie: | Nebulae |
Souřadnice
Position (RA): | 5 29 33.72 |
Position (Dec): | -70° 59' 26.94" |
Field of view: | 6.64 x 6.64 arcminutes |
Orientace: | Sever je 0.1° pravá od svislé osy |
Barvy & filtry
Pásmo | Vlnová délka | Dalekohled |
---|---|---|
Optický Heii | 468 nm | Very Large Telescope FORS1 |
Optický Oiii | 500 nm | Very Large Telescope FORS1 |
Optický Oiii | 495 nm | Very Large Telescope FORS1 |
Optický H-alpha | 656 nm | Very Large Telescope FORS1 |