Sean M. Andrews and Jonathan P. Williams 2005 ApJ 619 L175 doi:10.1086/427325
Submillimeter Array Observations of Disks in the SR 24 Multiple Star System*
FREESean M. Andrews1 and Jonathan P. Williams1
Show affiliationsWe present high-resolution aperture synthesis images from the Submillimeter Array of the 225 GHz (1.3 mm) continuum and 12CO J = 2-1 line emission from the disks around components of the hierarchical triple system SR 24, located in the Ophiuchus star-forming region. The most widely separated component, SR 24 S (with a projected semimajor axis a = 832 AU), has a circumstellar disk with properties typical of those around single T Tauri stars. The binary SR 24 N (a = 32 AU) is undetected in the continuum but has strong, resolved CO emission that likely originates in a circumbinary disk with a central gap. The data constrain the total disk mass in the SR 24 N system to be 
10-3 M
and indicate that the depletion of CO onto dust grains is not more than 100 times larger than the mean value in the interstellar medium. The SR 24 N disk is unusual in that it is only detected in line emission. It is possible that other low-mass disks around binaries and single stars may have been missed in single-dish continuum surveys.
- Footnote
- Subject headings
binaries: close; circumstellar matter; stars: individual (SR 24)
- Dates
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Issue 2 (2005 February 1)
Received 2004 September 8, accepted for publication 2004 November 10
Published 2005 January 3
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Submillimeter Array Observations of Disks in the SR 24 Multiple Star System
Sean M. Andrews and Jonathan P. Williams 2005 ApJ 619 L175
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