Milliarcsecond resolution infrared observations of young stars in Taurus and Ophiuchus

Details Milliarcsecond resolution infrared observations of young stars in Taurus and Ophiuchus Milliarcsecond resolution infrared observations of young stars in Taurus and Ophiuchus

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...320..344s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 320, Sept. 1, 1987, p. 344-355. Research supported by the University of Mis

Astronomy and Astrophysics

Astrophysics

61

Angular Resolution, Early Stars, Infrared Spectra, Ophiuchi Clouds, Taurus Constellation, Binary Stars, Extremely High Frequencies, Lunar Occultation, Speckle Interferometry, Stellar Spectra

Scientific paper

The paper reports K-band lunar occultation observations of 18 stars in the Taurus and Ophiuchus star-forming regions. Four of the systems, HQ Tau, FF Tau, and SR 12 and ROX 31 in Ophiuchus, are binaries. Their separations, as observed in the projection along the directions of their occultations, range from about 5 to 186 milliarcseconds (mas). SR 12 was also observed by the technique of speckle interferometry in the J, H, and K bands. These observations, taken together with the lunar occultation results, show that SR 12 is an about 0.30 arcsec binary system whose components are late-type stars still approaching the main sequence. The lunar occultation observations reveal extended structure associated with two objects. Elias 29 in Ophiuchus contains a central component about 7 mas in diameter, that radiates most of the flux, and a much larger diffuse component. YLW 16A, also in Ophiuchus, is an extended object about 0.5 arcsec in diameter.

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