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Deuterium fractionation across the infrared-dark cloud G034.77-00.55 interacting with the supernova remnant W44

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Názov: Deuterium fractionation across the infrared-dark cloud G034.77-00.55 interacting with the supernova remnant W44
Autori: Cosentino, Giuliana, 1990, Tan, Jonathan, 1973, Jimenez-Serra, I., Fontani, Francesco, Caselli, P., Henshaw, Jonathan D., Barnes, Ashley T., Law, Chi Yan, 1990, Viti, Serena, Fedriani, R., Hsu, Chia-Jung, 1991, Gorai, Prasanta, 1991, Zeng, Shaoshan
Zdroj: Chockkompressioner i det interstellära mediet som triggers av Star Formation Star formation history of MAssive pRoTostars (SMART) Astronomy and Astrophysics. 675
Predmety: ISM: individual objects: G34.77-00.55, ISM: individual objects: W44, Stars: formation, ISM: clouds, ISM: supernova remnants, Astrochemistry
Popis: 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.
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Prístupová URL adresa: https://research.chalmers.se/publication/536909
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Deuterium fractionation across the infrared-dark cloud G034.77-00.55 interacting with the supernova remnant W44
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Cosentino%2C+Giuliana%22">Cosentino, Giuliana</searchLink>, 1990<br /><searchLink fieldCode="AR" term="%22Tan%2C+Jonathan%22">Tan, Jonathan</searchLink>, 1973<br /><searchLink fieldCode="AR" term="%22Jimenez-Serra%2C+I%2E%22">Jimenez-Serra, I.</searchLink><br /><searchLink fieldCode="AR" term="%22Fontani%2C+Francesco%22">Fontani, Francesco</searchLink><br /><searchLink fieldCode="AR" term="%22Caselli%2C+P%2E%22">Caselli, P.</searchLink><br /><searchLink fieldCode="AR" term="%22Henshaw%2C+Jonathan+D%2E%22">Henshaw, Jonathan D.</searchLink><br /><searchLink fieldCode="AR" term="%22Barnes%2C+Ashley+T%2E%22">Barnes, Ashley T.</searchLink><br /><searchLink fieldCode="AR" term="%22Law%2C+Chi+Yan%22">Law, Chi Yan</searchLink>, 1990<br /><searchLink fieldCode="AR" term="%22Viti%2C+Serena%22">Viti, Serena</searchLink><br /><searchLink fieldCode="AR" term="%22Fedriani%2C+R%2E%22">Fedriani, R.</searchLink><br /><searchLink fieldCode="AR" term="%22Hsu%2C+Chia-Jung%22">Hsu, Chia-Jung</searchLink>, 1991<br /><searchLink fieldCode="AR" term="%22Gorai%2C+Prasanta%22">Gorai, Prasanta</searchLink>, 1991<br /><searchLink fieldCode="AR" term="%22Zeng%2C+Shaoshan%22">Zeng, Shaoshan</searchLink>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <i>Chockkompressioner i det interstellära mediet som triggers av Star Formation Star formation history of MAssive pRoTostars (SMART) Astronomy and Astrophysics</i>. 675
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22ISM%3A+individual+objects%3A+G34%2E77-00%2E55%22">ISM: individual objects: G34.77-00.55</searchLink><br /><searchLink fieldCode="DE" term="%22ISM%3A+individual+objects%3A+W44%22">ISM: individual objects: W44</searchLink><br /><searchLink fieldCode="DE" term="%22Stars%3A+formation%22">Stars: formation</searchLink><br /><searchLink fieldCode="DE" term="%22ISM%3A+clouds%22">ISM: clouds</searchLink><br /><searchLink fieldCode="DE" term="%22ISM%3A+supernova+remnants%22">ISM: supernova remnants</searchLink><br /><searchLink fieldCode="DE" term="%22Astrochemistry%22">Astrochemistry</searchLink>
– Name: Abstract
  Label: Description
  Group: Ab
  Data: 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.
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  Label: File Description
  Group: SrcInfo
  Data: electronic
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1051/0004-6361/202346676
    Languages:
      – Text: English
    Subjects:
      – SubjectFull: ISM: individual objects: G34.77-00.55
        Type: general
      – SubjectFull: ISM: individual objects: W44
        Type: general
      – SubjectFull: Stars: formation
        Type: general
      – SubjectFull: ISM: clouds
        Type: general
      – SubjectFull: ISM: supernova remnants
        Type: general
      – SubjectFull: Astrochemistry
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      – TitleFull: Deuterium fractionation across the infrared-dark cloud G034.77-00.55 interacting with the supernova remnant W44
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              Type: published
              Y: 2023
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              Value: 675
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            – TitleFull: Chockkompressioner i det interstellära mediet som triggers av Star Formation Star formation history of MAssive pRoTostars (SMART) Astronomy and Astrophysics
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