Protostar HH-34 in Orion

Eso_eso9948b_1024

eso_eso9948b November 17th, 1999

Credit: ESO

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.

Provider: European Southern Observatory

Image Source: https://www.eso.org/public/images/eso9948b/

Curator: European Southern Observatory, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
HH 34
Subject - Milky Way
Star > Evolutionary Stage > Protostar
Eso_eso9948b_128
 

Position Details

Position (ICRS)
RA = 5h 35m 28.0s
DEC = -6° 25’ 45.4”
Orientation
North is 1.6° CW
Field of View
6.7 x 6.7 arcminutes
Constellation
Orion

Color Mapping

  Telescope Spectral Band Wavelength
Blue VLT (FORS2) Optical (B) 429.0 nm
Green VLT (FORS2) Optical (H-alpha) 656.0 nm
Red VLT (FORS2) Optical (SII) 673.0 nm
Spectrum_base
Blue
Green
Red
Eso_eso9948b_1280
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ID
eso9948b
Subject Category
B.3.1.1  
Subject Name
HH 34
Credits
ESO
Release Date
1999-11-17T00:00:00
Lightyears
Redshift
Reference Url
https://www.eso.org/public/images/eso9948b/
Type
Observation
Image Quality
Distance Notes
Distance in light years from NASA.
Facility
Very Large Telescope, Very Large Telescope, Very Large Telescope
Instrument
FORS2, FORS2, FORS2
Color Assignment
Blue, Green, Red
Band
Optical, Optical, Optical
Bandpass
B, H-alpha, SII
Central Wavelength
429, 656, 673
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
83.8665421207, -6.42927514071
Reference Dimension
1280.0, 1280.0
Reference Pixel
749.0, 717.0
Scale
-8.73129206268e-05, 8.73129206268e-05
Rotation
-1.56794867315
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
Creator (Curator)
European Southern Observatory
URL
http://www.eso.org/
Name
Email
Telephone
Address
Karl-Schwarzschild-Strasse 2
City
Garching bei München
State/Province
Postal Code
D-85748
Country
Germany
Rights
Creative Commons Attribution 4.0 International License
Publisher
European Southern Observatory
Publisher ID
eso
Resource ID
eso9948b
Metadata Date
2019-09-16T05:19:22.689118
Metadata Version
1.1
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Detailed color mapping information coming soon...

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There is no distance meta data in this image.