Protostar HH-34 in Orion

Three-colour composite of the young object Herbig-Haro 34 (HH-34), now in the protostar stage of evolution. It is based on CCD frames obtained with the FORS2 instrument in imaging mode, on November 2 and 6, 1999.

This object has a remarkable, very complicated appearance that includes two opposite jets that ram into the surrounding interstellar matter. This structure is produced by a machine-gun-like blast of "bullets" of dense gas ejected from the star at high velocities (approaching 250 km/sec). This seems to indicate that the star experiences episodic "outbursts" when large chunks of material fall onto it from a surrounding disc.

HH-34 is located at a distance of approx. 1,500 light-years, near the famous Orion Nebula, one of the most productive star birth regions. Note also the enigmatic "waterfall" to the upper left, a feature that is still unexplained.

The composite of three images was taken through three different filters : B (wavelength 429 nm; Full-Width-Half-Maximum (FWHM) 88 nm; exposure time 10 min; here rendered as blue), H-alpha (centered on the hydrogen emission line at wavelength 656 nm; FWHM 6 nm; 30 min; green) and S II (centrered at the emission lines of inonized sulphur at wavelength 673 nm; FWHM 6 nm; 30 min; red) during a period of 0.8 arcsec seeing. The field shown measures 6.8 x 6.8 arcmin and the images were recorded in frames of 2048 x 2048 pixels, each measuring 0.2 arcsec. North is up; East is left.

Źródło:

ESO

O zdjęciu

Identyfikator:eso9948b
Typ:Obserwacje
Data publikacji:17 listopada 1999
Powiązane komunikaty:eso9948
Rozmiar:4961 x 4961 px

O obiekcie

Nazwa:HH 34
Typ:Milky Way : Star : Evolutionary Stage : Protostar
Odległość:1500 lat świetlnych
Constellation:Orion
Kategoria:Nebulae

Formaty zdjęć

Pełen rozmiar
70,4 MB
Wielki JPEG
4,3 MB
JPEG do druku
4,9 MB

Powiększenie


Tapety

1024x768
296,7 KB
1280x1024
469,4 KB
1600x1200
655,2 KB
1920x1200
758,2 KB
2048x1536
984,3 KB

Współrzędne

Pozycja (RA):5 35 27.97
Pozycja (Dec):-6° 25' 45.39"
Pole widzenia:6.71 x 6.71 arcminutes
Orientacja:North is 1.6° prawo of vertical

Kolory i filtry

PasmoDługość faliTeleskop
Optyczny
B
429 nmVery Large Telescope
FORS2
Optyczny
H-alpha
656 nmVery Large Telescope
FORS2
Optyczny
SII
673 nmVery Large Telescope
FORS2