Protostar HH 34 in Orion

This image is an enlargement of a 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.

Crédit:

ESO

À propos de l'image

Identification:eso9948c
Type:Observation
Date de publication:17 novembre 1999
Communiqués de presse en rapport:eso9948
Taille:802 x 895 px

À propos de l'objet

Nom:HH 34
Type:Milky Way : Star : Evolutionary Stage : Protostar
Distance:1500 années lumière
Constellation:Orion
Catégorie:Nebulae

Formats des images

Grand JPEG
271,5 Kio
JPEG taille écran
345,7 Kio

Fonds d'écran

1024x768
350,2 Kio
1280x1024
512,4 Kio
1600x1200
653,5 Kio
1920x1200
696,2 Kio
2048x1536
906,7 Kio

Coordinates

Position (RA):5 35 30.98
Position (Dec):-6° 28' 37.86"
Field of view:2.66 x 2.97 arcminutes
Orientation:North is 0.9° right of vertical

Couleurs & filtres

DomaineLongueur d'ondeTélescope
Visible
B
429 nmVery Large Telescope
FORS2
Visible
H-alpha
429 nmVery Large Telescope
FORS2
Visible
Sii
673 nmVery Large Telescope
FORS2