GAS AND DUST ABSORPTION IN THE DoAr 24E SYSTEM

Journal Article · Tue Nov 20 00:00:00 EST 2012 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/760/1/88· OSTI ID:22086286

Kruger, Andrew J ^[1]; Richter, Matthew J ^[2]; Seifahrt, Andreas ^[3]; Carr, John S ^[4]; Najita, Joan R ^[5]; Moerchen, Margaret M ^[6]; Doppmann, Greg W ^[7]

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1. Department of Physical Science, Wilbur Wright College, 4300 North Narragansett Avenue, Chicago, IL 60634 (United States)
2. Department of Physics, University of California at Davis, One Shields Avenue, Davis, CA 95616 (United States)
3. Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 (United States)
4. Remote Sensing Division, Naval Research Laboratory, Code 7210, Washington, DC 20375 (United States)
5. National Optical Astronomy Observatory, Tucson, AZ 85719 (United States)
6. European Southern Observatory, Alonso de Cordova 3107, Santiago (Chile)
7. W.M. Keck Observatory, 65-1120 Mamalahoa Hwy, Kamuela, HI 96743 (United States)

We present findings for DoAr 24E, a binary system that includes a classical infrared companion. We observed the DoAr 24E system with the Spitzer Infrared Spectrograph (IRS), with high-resolution, near-infrared spectroscopy of CO vibrational transitions, and with mid-infrared imaging. The source of high extinction toward infrared companions has been an item of continuing interest. Here we investigate the disk structure of DoAr 24E using the column densities, temperature, and velocity profiles of two CO absorption features seen toward DoAr 24Eb. We model the spectral energy distributions found using T-ReCS imaging and investigate the likely sources of extinction toward DoAr 24Eb. We find the lack of silicate absorption and small CO column density toward DoAr 24Eb suggest that the mid-infrared continuum is not as extinguished as the near-infrared, possibly due to the mid-infrared originating from an extended region. This, along with the velocity profile of the CO absorption, suggests that the source of high extinction is likely due to a disk or disk wind associated with DoAr 24Eb.

• OSTI ID: 22086286
• Journal Information: Astrophysical Journal, Vol. 760, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABSORPTION
ABSORPTION SPECTROSCOPY
ASTRONOMY
ASTROPHYSICS
BINARY STARS
CARBON MONOXIDE
COSMIC DUST
DENSITY
ENERGY SPECTRA
INFRARED SPECTRA
MAIN SEQUENCE STARS
NEAR INFRARED RADIATION
PROTOPLANETS
SILICATES
STELLAR WINDS
VELOCITY