HyGAL: Characterizing the Galactic Interstellar Medium with Observations of Hydrides and Other Small Molecules. I. Survey Description and a First Look Toward W3(OH), W3 IRS5, and NGC 7538 IRS1 [PDF]
The Astrophysical Journal, 2022 Abstract The HyGAL Stratospheric Observatory for Infrared Astronomy legacy program surveys six hydride molecules—ArH+, OH+, H2O+, SH, OH, and CH—and two atomic constituents—C+ and O—within the diffuse interstellar medium (ISM) by means of absorption-line spectroscopy toward 25 bright Galactic background continuum sources.
A. M. Jacob +25 more
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Molecules in Comets: An ISM-Solar System Connection? [PDF]
Symposium - International Astronomical Union, 2000 Our knowledge of the volatile composition of comets has advanced considerably since the last IAU Astrochemistry Symposium, in large part due to the apparition of comet Hale-Bopp and its study with both new ground-based instruments and from spacecraft. Some 23 or 24 coma molecules are now known which are probably, at least in part, volatile constituents
Irvine, William M., Bergin, EA
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HyGAL: Characterizing the Galactic ISM with observations of hydrides and other small molecules
Astronomy & Astrophysics, 2023 As a complement to the HyGAL Stratospheric Observatory for Infrared Astronomy Legacy Program, we report the results of a groundbased absorption line survey of simple molecules in diffuse and translucent Galactic clouds. Using the Institut de Radioastronomie Millimétrique (IRAM) 30 m telescope, we surveyed molecular lines in the 2 mm and 3 mm wavelength
Kim, W-J +13 more
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Are molecule-covered dust grains efficient catalysts of H2 formation in the cold ISM? [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 International ...
Gavilan, L., Lemaire, J., Vidali, G.
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Analyzing observations of molecules in the ISM: Theoretical and experimental studies of energy transfer [PDF]
EAS Publications Series, 2012 Our laboratories have recently calculated a set of collision coefficients characterizing the efficiency of energy transfer between helium and/or hydrogen and a large variety of interstellar molecules. We have considered with molecules ranging from light hydrides, observed by the Herschel Space Observatory, to medium size molecules, observed by mm ...
Wiesenfeld, L. +6 more
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Laboratory studies of formation of molecules on dust grain analogues under ISM conditions [PDF]
Journal of Geophysical Research: Planets, 2004 Certain important molecules of the interstellar medium (ISM), such as H2 and CO2, are believed to have been formed on surfaces of dust grains. We describe experimental methods that we used to study the formation of H2 and CO2 on dust grain analogues in conditions approximating the ones found in key interstellar environments.
Vidali G +3 more
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Molecules from evolved stars and their role in the cycle of the ISM
EPJ Web of Conferences, 2022 The ejecta of evolved stars are among the most efficient chemical laboratories in the Universe. Many of the chemical compounds synthesized in these environments probably travel along the interstellar medium and may be ultimately delivered to planets. However, we still do not understand many of the chemical processes at work during the evolution from ...
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Molecules in Action: Extragalactic ISM at high resolution [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractDuring the last two decade, observations have shown the potential of molecular tracers to get insights into the physical processes taking place in the central regions of active galaxies. However, observations were severely limited by both sensitivity and resolution.
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Untangling the Formation Mechanisms of Biorelevant Molecules in the ISM with Photoionization Reflectron Time-of-Flight Mass Spectrometry [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractExploiting reflectron time of flight mass spectrometry coupled with single photon ionization of the subliming molecules (PI-ReTOF-MS) during the temperature programmed desorption (TPD) and combining these data with on line and in situ infrared spectroscopy (FTIR), a versatile experimental approach has been established to elucidate the formation
Marko Förstel, Ralf I. Kaiser
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