Palomar Testbed Interferometer Observations of Young Stellar Objects |
| |
| Authors: | FP Wilkin RL Akeson |
| |
| Institution: | (1) Instituto de Astronomía, Universidad Nacional Autónoma de México, Unidad Morelia, Apdo.Postal 3-72 (Xangari), 58090 Morelia, Michoacán, México; E-mail;(2) Michelson Science Center, California Institute of Technology, MS 100-22, Pasadena, CA 91125, USA |
| |
| Abstract: | We present observations of a sample of Herbig AeBe stars, as well as the FU Orionis object V1057 Cygni. Our K-band (2.2μm)
observations from the Palomar Testbed Interferometer (PTI) used baselines of 110 m and 85 m, resulting in fringe spacings
of ∼4 mas and 5 mas, respectively. Fringes were obtained for the first time on V1057 Cygnias well as V594 Cas. Additional
measurements were made of MWC147, while upper limits to visibility-squared are obtained for MWC297, HD190073, and MWC614.
These measurements are sensitive to the distribution of warm, circumstellar dust in these sources. If the circumstellar infrared
emission comes from warm dust in a disk, the inclination of the disk to the line of sight implies that the observed interferometric
visibilities should depend upon hour angle. Surprisingly, the observations of Millan-Gabet, Schloerb and Traub (2001)(hereafter
MST) did not show significant variation with hour angle. However, limited sampling of angular frequencies on the sky was possible
with the IOTA interferometer, motivating us to study a subset of their objects to further constrain these systems.
This revised version was published online in July 2006 with corrections to the Cover Date. |
| |
| Keywords: | optical interferometry young stars circumstellar matter |
| 本文献已被 SpringerLink 等数据库收录！ |
|
