HIFI spectrum of DR21

Nhsc_nhsc2009-021h_1024

nhsc_nhsc2009-021h November 27th, 2009

Credit: ESA/NASA/JPL-Caltech

This is one of the early spectra obtained with the HIFI instrument on Herschel. This HIFI spectrum of a massive star-forming region reveals the fingerprints of a number of key organic molecules, such as formaldehyde (H2CO), carbon sulphide (CS), the formyl ion (HCO+), the ethynyl radical (C2H), and the methyladyne radical (CH).

Observations of regions of massive star formation reveal a rich inventory of organic molecules. These lines give insight into the chemistry and physical conditions in this region. HIFI can for the first time observe the submillimetre spectral regime unhampered by telluric absorption. It will therefore provide an unbiased inventory of the molecular composition of such regions and new insights into the formation and early evolution of stars.

This spectrum was obtained by the frequency switch mode. In this mode the local oscillator is tuned between two slightly different frequencies reversing one of the two spectra and resulting in two phases. These spectra (phases) can be recombined later for further analysis.

Provider: Herschel Space Observatory

Image Source: https://www.herschel.caltech.edu/image/nhsc2009-021h

Curator: NASA Herschel Science Center, Pasadena, CA, USA

Image Use Policy: http://www.jpl.nasa.gov/imagepolicy/

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Image Details

Image Type
Chart
Object Name
DR21
Subject - Milky Way
Nebula > Type > Star Formation
Nhsc_nhsc2009-021h_1280
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ID
nhsc2009-021h
Subject Category
B.4.1.2  
Subject Name
DR21
Credits
ESA/NASA/JPL-Caltech
Release Date
2009-11-27
Lightyears
Redshift
Reference Url
https://www.herschel.caltech.edu/image/nhsc2009-021h
Type
Chart
Image Quality
Good
Distance Notes
Facility
Instrument
Color Assignment
Band
Bandpass
Central Wavelength
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
Equinox
Reference Value
Reference Dimension
Reference Pixel
Scale
Rotation
Coordinate System Projection:
Quality
FITS Header
Notes
Creator (Curator)
NASA Herschel Science Center
URL
http://www.herschel.caltech.edu/
Name
Email
Telephone
Address
1200 E. California Blvd.
City
Pasadena
State/Province
CA
Postal Code
91125
Country
USA
Rights
http://www.jpl.nasa.gov/imagepolicy/
Publisher
Publisher ID
nhsc
Resource ID
Metadata Date
2018-06-21T00:14:34Z
Metadata Version
1.2
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