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H_2 Mid-IR Pure Rotational Emission from Young Stars: The TEXES/IRTF Survey

Richter, Matthew J. and Lacy, John H. and Greathouse, Thomas K. and Jaffe, Daniel T. and Blake, Geoffrey A. (2006) H_2 Mid-IR Pure Rotational Emission from Young Stars: The TEXES/IRTF Survey. In: High Resolution Infrared Spectroscopy in Astronomy. ESO Astrophysics Symposia. Springer-Verlag , Berlin/Heidelberg, pp. 197-202. ISBN 3540252568.

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We describe the TEXES survey for mid-IR H_2 pure rotational emission from young stars and report early successes. H_2 emission is a potential tracer of warm gas in circumstellar disks. Three pure rotational lines are available from the ground: the J=3 ⇒ 1, J=4 ⇒ 2, and J=6 ⇒ 4, transitions at 17.035 μm, 12.279 μm, and 8.025 μm, respectively. Using TEXES at the NASA IRTF 3m, we are midway through a survey of roughly 30 pre-main-sequence stars. To date, detected lines are all resolved, generally with FWHM<10 km/s. Preliminary analysis suggests the gas temperatures are between 400 and 800 K. From the work so far, we conclude that high spectral and spatial resolution are critical to the investigation of H_2 in disks.

Item Type:Book Section
Related URLs:
URLURL TypeDescription ReadCube access
Richter, Matthew J.0000-0002-8594-2122
Lacy, John H.0000-0001-6783-2328
Jaffe, Daniel T.0000-0003-3577-3540
Blake, Geoffrey A.0000-0003-0787-1610
Alternate Title:H2 Mid-IR Pure Rotational Emission from Young Stars: The TEXES/IRTF Survey
Additional Information:© Springer-Verlag Berlin Heidelberg 2005. Support for this work comes from a Texas Advanced Research Program grant TARP 00365-0473-1999. MJR acknowledges grant USRA 8500-98-008 through the SOFIA program and NSF grant AST-0307497. This research has made use of NASA’s Astrophysics Data System and the SIMBAD database operated at the Centre de Donnes astronomiques de Strasbourg, France.
Funding AgencyGrant Number
Texas Advanced Research Program00365-0473-1999
Universities Space Research Association8500-98-008
Subject Keywords:Young Star; Precipitable Water Vapor; Rotational Line; Circumstellar Disk; Infrared Space Observatory
Series Name:ESO Astrophysics Symposia
Record Number:CaltechAUTHORS:20190828-102317605
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98298
Deposited By: George Porter
Deposited On:28 Aug 2019 20:14
Last Modified:16 Nov 2021 17:38

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