CHEMO-DYNAMICAL MODELING OF CHA-MMS1 TO PREDICT NEW SOLID-PHASE SPECIES FOR DETECTION WITH JWST

International Symposium on Molecular Spectroscopy (ISMS), pp. 1

Abstract

Chemical models and experiments indicate that interstellar dust grains and their ice mantles play an important role in the production of complex organic molecules (COMs). The meeting of chemical species adsorbed from the gas phase onto the grain/ice surface allows reactions to occur efficiently, and leads to the emergence of the ice mantles as a major reservoir of volatile species. To date, the most complex solid-phase molecule detected with certainty in the ISM is methanol (\chem{CH_3OH}), but it is hoped that the upcoming James Webb Space Telescope (JWST), aided by new laboratory data, will be able to identify yet larger organic species. In this study, we use a coupled chemo-dynamical model to predict new candidate species for JWST detection toward the young star-forming core Cha-MMS1, combining the gas-grain chemical kinetic model MAGICKAL with a 1-D radiative hydrodynamics (RHD) simulation. The abundances of the main ice constituents with respect to water in the model match well with observational values. The model also predicts high solid-phase abundances of intermediate radicals associated with the hydrogenation of CO to methanol ($>$ 0.1 \% with respect to water ice). Four oxygen-bearing COMs (ethanol \chem{C_2H_5OH}, dimethyl ether \chem{CH_3OCH_3}, methyl formate \chem{CH_3OCHO}, and acetaldehyde \chem{CH_3CHO}) as well as formic acid (HCOOH), show abundances as high as $>$ 0.01 \% with respect to water ice. N-bearing COMs are generally less abundant than O-bearing ones, suggesting methylamine (\chem{CH_3NH_2}) as the only N-bearing solid-phase COM candidate for JWST detection.

Authors 8

1. Miwha Jin Aachen Leiden Observatory Laboratory for Astrophysics, Universiteit Leiden

   University of Hawaiʻi at Mānoa · Leiden University · Leiden Observatory · University of Virginia

   Affiliation as printed

   ADWIN BOOGERT, W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, HI, USA;

   Department of Astronomy, University of Virginia, Charlottesville, VA, USA;

   Department of Chemistry, The University of Virginia, Char-lottesville, VA, USA

   Department of Chemistry, University of Virginia, Charlottesville, VA, USA;

   Departments of Chemistry and Astronomy, The University of Virginia, Charlottesville, VA, USA;

   Leiden Observatory, Laboratory for Astrophysics, Universiteit Leiden, Leiden, Netherlands;

   SCHELTINGA, Leiden Observatory, Laboratory for Astrophysics, Universiteit Leiden, Leiden, Netherlands;

   ZHI-YUN LI, Department of Astronomy, The University of Virginia, Charlottesville, VA, USA;

2. Eric Herbst Aachen Leiden Observatory Laboratory for Astrophysics, Universiteit Leiden

   University of Hawaiʻi at Mānoa · Leiden University · Leiden Observatory · University of Virginia

   Affiliation as printed

   ADWIN BOOGERT, W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, HI, USA;

   Department of Astronomy, University of Virginia, Charlottesville, VA, USA;

   Department of Chemistry, The University of Virginia, Char-lottesville, VA, USA

   Department of Chemistry, University of Virginia, Charlottesville, VA, USA;

   Departments of Chemistry and Astronomy, The University of Virginia, Charlottesville, VA, USA;

   Leiden Observatory, Laboratory for Astrophysics, Universiteit Leiden, Leiden, Netherlands;

   SCHELTINGA, Leiden Observatory, Laboratory for Astrophysics, Universiteit Leiden, Leiden, Netherlands;

   ZHI-YUN LI, Department of Astronomy, The University of Virginia, Charlottesville, VA, USA;

3. Adwin C. A. Boogert
4. Melissa K. McClure Aachen Leiden Observatory Laboratory for Astrophysics, Universiteit Leiden

   University of Hawaiʻi at Mānoa · Leiden University · Leiden Observatory · University of Virginia

   Affiliation as printed

   ADWIN BOOGERT, W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, HI, USA;

   Department of Astronomy, University of Virginia, Charlottesville, VA, USA;

   Department of Chemistry, The University of Virginia, Char-lottesville, VA, USA

   Department of Chemistry, University of Virginia, Charlottesville, VA, USA;

   Departments of Chemistry and Astronomy, The University of Virginia, Charlottesville, VA, USA;

   Leiden Observatory, Laboratory for Astrophysics, Universiteit Leiden, Leiden, Netherlands;

   SCHELTINGA, Leiden Observatory, Laboratory for Astrophysics, Universiteit Leiden, Leiden, Netherlands;

   ZHI-YUN LI, Department of Astronomy, The University of Virginia, Charlottesville, VA, USA;

5. Zhi‐Yun Li Aachen Leiden Observatory Laboratory for Astrophysics, Universiteit Leiden

   University of Hawaiʻi at Mānoa · Leiden University · Leiden Observatory · University of Virginia

   Affiliation as printed

   ADWIN BOOGERT, W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, HI, USA;

   Department of Astronomy, University of Virginia, Charlottesville, VA, USA;

   Department of Chemistry, The University of Virginia, Char-lottesville, VA, USA

   Department of Chemistry, University of Virginia, Charlottesville, VA, USA;

   Departments of Chemistry and Astronomy, The University of Virginia, Charlottesville, VA, USA;

   Leiden Observatory, Laboratory for Astrophysics, Universiteit Leiden, Leiden, Netherlands;

   SCHELTINGA, Leiden Observatory, Laboratory for Astrophysics, Universiteit Leiden, Leiden, Netherlands;

   ZHI-YUN LI, Department of Astronomy, The University of Virginia, Charlottesville, VA, USA;

6. R. T. Garrod Aachen Leiden Observatory Laboratory for Astrophysics, Universiteit Leiden

   University of Hawaiʻi at Mānoa · Leiden University · Leiden Observatory · University of Virginia

   Affiliation as printed

   ADWIN BOOGERT, W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, HI, USA;

   Department of Astronomy, University of Virginia, Charlottesville, VA, USA;

   Department of Chemistry, The University of Virginia, Char-lottesville, VA, USA

   Department of Chemistry, University of Virginia, Charlottesville, VA, USA;

   Departments of Chemistry and Astronomy, The University of Virginia, Charlottesville, VA, USA;

   Leiden Observatory, Laboratory for Astrophysics, Universiteit Leiden, Leiden, Netherlands;

   SCHELTINGA, Leiden Observatory, Laboratory for Astrophysics, Universiteit Leiden, Leiden, Netherlands;

   ZHI-YUN LI, Department of Astronomy, The University of Virginia, Charlottesville, VA, USA;

7. J. Terwisscha van Scheltinga Aachen Leiden Observatory Laboratory for Astrophysics, Universiteit Leiden

   University of Hawaiʻi at Mānoa · Leiden University · Leiden Observatory · University of Virginia

   Affiliation as printed

   ADWIN BOOGERT, W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, HI, USA;

   Department of Astronomy, University of Virginia, Charlottesville, VA, USA;

   Department of Chemistry, The University of Virginia, Char-lottesville, VA, USA

   Department of Chemistry, University of Virginia, Charlottesville, VA, USA;

   Departments of Chemistry and Astronomy, The University of Virginia, Charlottesville, VA, USA;

   Leiden Observatory, Laboratory for Astrophysics, Universiteit Leiden, Leiden, Netherlands;

   SCHELTINGA, Leiden Observatory, Laboratory for Astrophysics, Universiteit Leiden, Leiden, Netherlands;

   ZHI-YUN LI, Department of Astronomy, The University of Virginia, Charlottesville, VA, USA;

8. Kaho Lam Aachen Leiden Observatory Laboratory for Astrophysics, Universiteit Leiden

   University of Hawaiʻi at Mānoa · Leiden University · Leiden Observatory · University of Virginia

   Affiliation as printed

   ADWIN BOOGERT, W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, HI, USA;

   Department of Astronomy, University of Virginia, Charlottesville, VA, USA;

   Department of Chemistry, The University of Virginia, Char-lottesville, VA, USA

   Department of Chemistry, University of Virginia, Charlottesville, VA, USA;

   Departments of Chemistry and Astronomy, The University of Virginia, Charlottesville, VA, USA;

   Leiden Observatory, Laboratory for Astrophysics, Universiteit Leiden, Leiden, Netherlands;

   SCHELTINGA, Leiden Observatory, Laboratory for Astrophysics, Universiteit Leiden, Leiden, Netherlands;

   ZHI-YUN LI, Department of Astronomy, The University of Virginia, Charlottesville, VA, USA;