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Deuterium fractiona...
Deuterium fractionation across the infrared-dark cloud G034.77-00.55 interacting with the supernova remnant W44
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- Cosentino, Giuliana, 1990 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Tan, Jonathan, 1973 (author)
- University of Virginia,Chalmers tekniska högskola,Chalmers University of Technology
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- Jimenez-Serra, I. (author)
- Centro de Astrobiologia (CAB)
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- Fontani, Francesco (author)
- Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory
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- Caselli, P. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Henshaw, Jonathan D. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Liverpool John Moores University
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- Barnes, Ashley T. (author)
- European Southern Observatory (ESO)
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- Law, Chi Yan, 1990 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,European Southern Observatory (ESO)
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- Viti, Serena (author)
- Universiteit Leiden (UL),Leiden University (UL),University College London (UCL)
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- Fedriani, R. (author)
- Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
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- Hsu, Chia-Jung, 1991 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Gorai, Prasanta, 1991 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Zeng, Shaoshan (author)
- RIKEN
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Astronomy and Astrophysics. - 0004-6361 .- 1432-0746. ; 675
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https://doi.org/10.1...
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Abstract
Subject headings
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- Supernova remnants (SNRs) may regulate star formation in galaxies. For example, SNR-driven shocks may form new molecular gas or compress pre-existing clouds and trigger the formation of new stars. Aims. To test this scenario, we measured the deuteration of N2H+, DNfrac 2H+- a well-studied tracer of pre-stellar cores - across the infrared-dark cloud (IRDC) G034.77-00.55, which is known to be experiencing a shock interaction with the SNR W44. Methods. We use N2H+ and N2D+ J = 1-0 single pointing observations obtained with the 30m antenna at the Instituto de Radioastronomia Millimetrica to infer DN2H+ frac towards five positions across the cloud, namely a massive core, different regions across the shock front, a dense clump, and ambient gas. Results. We find DN2H+ frac in the range 0.03-0.1, which is several orders of magnitude larger than the cosmic D/H ratio (∼10-5). The DN2H+ frac across the shock front is enhanced by more than a factor of 2 (DNfrac 2H+∼ 0.05-0.07) with respect to the ambient gas (=0.03) and similar to that measured generally in pre-stellar cores. Indeed, in the massive core and dense clump regions of this IRDC we measure DN2H+ frac ∼ 0.1.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- ISM: supernova remnants
- Astrochemistry
- ISM: individual objects: W44
- ISM: individual objects: G34.77-00.55
- Stars: formation
- ISM: clouds
Publication and Content Type
- art (subject category)
- ref (subject category)
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Cosentino, Giuli ...
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Tan, Jonathan, 1 ...
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Jimenez-Serra, I ...
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Fontani, Frances ...
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Caselli, P.
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Henshaw, Jonatha ...
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Barnes, Ashley T ...
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Law, Chi Yan, 19 ...
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Viti, Serena
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Fedriani, R.
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Hsu, Chia-Jung, ...
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Gorai, Prasanta, ...
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Zeng, Shaoshan
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Astronomy Astrop ...
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Chalmers University of Technology