A Comparison of Circumprimary and Circumsecondary Disks in Young Binary Systems

Details A Comparison of Circumprimary and Circumsecondary Disks in Young Binary Systems A Comparison of Circumprimary and Circumsecondary Disks in Young Binary Systems

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...193.7311w&link_type=abstract

American Astronomical Society, 193rd AAS Meeting, #73.11; Bulletin of the American Astronomical Society, Vol. 30, p.1362

Astronomy and Astrophysics

Astronomy

2

Scientific paper

We present a high resolution survey conducted at NASA's IRTF at K (2.2 mu m) and L (3.6 mu m) of ~ 40 T Tauri binary stars with separations of 10-1000 AU. The K-L colors of the primaries and the secondaries are used to identify and to characterize circumprimary and circumsecondary accretion disks. Although we find several systems with only a circumprimary disk, we find no systems with only a circumsecondary disk. This suggests that circumprimary disks are longer lived. Furthermore, for systems in which both components support a circumstellar disk, the primary star is usually as red or redder in K-L than the secondary. This may indicate that primary stars, on average, have a higher accretion rate. Together these findings suggest that circumprimary disks must either be more massive or preferentially replenished.

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