WATER ABSORPTION FROM GAS VERY NEAR THE MASSIVE PROTOSTAR AFGL 2136 IRS 1
Abstract
We present ground-based observations of the ν{sub 1} and ν{sub 3} fundamental bands of H{sub 2}O toward the massive protostar AFGL 2136 IRS 1, identifying absorption features due to 47 different ro-vibrational transitions between 2.468 μm and 2.561 μm. Analysis of these features indicates the absorption arises in warm (T = 506 ± 25 K), very dense (n(H{sub 2}) > 5 × 10{sup 9} cm{sup –3}) gas, suggesting an origin close to the central protostar. The total column density of warm water is estimated to be N(H{sub 2}O) = (1.02 ± 0.02) × 10{sup 19} cm{sup –2}, giving a relative abundance of N(H{sub 2}O)/N(H{sub 2}) ≈ 10{sup –4}. Our study represents the first extensive use of water vapor absorption lines in the near infrared, and demonstrates the utility of such observations in deriving physical parameters.
- Authors:
-
- Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218 (United States)
- Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637 (United States)
- Department of Physics, University of California Davis, Davis, CA 95616 (United States)
- Publication Date:
- OSTI Identifier:
- 22270887
- Resource Type:
- Journal Article
- Journal Name:
- Astrophysical Journal
- Additional Journal Information:
- Journal Volume: 776; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABSORPTION; ABSORPTION SPECTRA; ASTRONOMY; ASTROPHYSICS; HOT WATER; HYDROGEN; MOLECULES; NEAR INFRARED RADIATION; PROTOSTARS; WATER VAPOR
Citation Formats
Indriolo, Nick, Neufeld, D. A., Seifahrt, A., and Richter, M. J. WATER ABSORPTION FROM GAS VERY NEAR THE MASSIVE PROTOSTAR AFGL 2136 IRS 1. United States: N. p., 2013.
Web. doi:10.1088/0004-637X/776/1/8.
Indriolo, Nick, Neufeld, D. A., Seifahrt, A., & Richter, M. J. WATER ABSORPTION FROM GAS VERY NEAR THE MASSIVE PROTOSTAR AFGL 2136 IRS 1. United States. https://doi.org/10.1088/0004-637X/776/1/8
Indriolo, Nick, Neufeld, D. A., Seifahrt, A., and Richter, M. J. 2013.
"WATER ABSORPTION FROM GAS VERY NEAR THE MASSIVE PROTOSTAR AFGL 2136 IRS 1". United States. https://doi.org/10.1088/0004-637X/776/1/8.
@article{osti_22270887,
title = {WATER ABSORPTION FROM GAS VERY NEAR THE MASSIVE PROTOSTAR AFGL 2136 IRS 1},
author = {Indriolo, Nick and Neufeld, D. A. and Seifahrt, A. and Richter, M. J.},
abstractNote = {We present ground-based observations of the ν{sub 1} and ν{sub 3} fundamental bands of H{sub 2}O toward the massive protostar AFGL 2136 IRS 1, identifying absorption features due to 47 different ro-vibrational transitions between 2.468 μm and 2.561 μm. Analysis of these features indicates the absorption arises in warm (T = 506 ± 25 K), very dense (n(H{sub 2}) > 5 × 10{sup 9} cm{sup –3}) gas, suggesting an origin close to the central protostar. The total column density of warm water is estimated to be N(H{sub 2}O) = (1.02 ± 0.02) × 10{sup 19} cm{sup –2}, giving a relative abundance of N(H{sub 2}O)/N(H{sub 2}) ≈ 10{sup –4}. Our study represents the first extensive use of water vapor absorption lines in the near infrared, and demonstrates the utility of such observations in deriving physical parameters.},
doi = {10.1088/0004-637X/776/1/8},
url = {https://www.osti.gov/biblio/22270887},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 776,
place = {United States},
year = {Thu Oct 10 00:00:00 EDT 2013},
month = {Thu Oct 10 00:00:00 EDT 2013}
}