A Search for Substellar Companions around 15 Weak-Lined T Tauri Stars with the Planetary Camera 2 of the Hubble Space Telescope

Details A Search for Substellar Companions around 15 Weak-Lined T Tauri Stars with the Planetary Camera 2 of the Hubble Space Telescope A Search for Substellar Companions around 15 Weak-Lined T Tauri Stars with the Planetary Camera 2 of the Hubble Space Telescope

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aj....129.2294m&link_type=abstract

The Astronomical Journal, Volume 129, Issue 5, pp. 2294-2307.

Astronomy and Astrophysics

Astronomy

11

Stars: Binaries: Spectroscopic, Stars: Planetary Systems, Stars: Imaging, Stars: Low-Mass, Brown Dwarfs, Stars: Pre-Main-Sequence

Scientific paper

To search for thermal emission from substellar companions, we have obtained Z-band images of 15 weak-lined T Tauri stars in the Taurus-Auriga and Ophiuchus star-forming regions using the Planetary Camera 2 on the Hubble Space Telescope. We found 18 faint nearby objects at separations larger than 4" but none at smaller separations. For 11 of these we have enough color information to suggest that they are not substellar members of the star-forming regions. The remaining seven faint nearby objects are candidate substellar objects. Our detection limit for companions with separations larger than about 1" is apparent Z=19.5 mag, corresponding to substellar objects in the mass range 3MJ-15MJ for the age range of our targets, 1.2-25 Myr. Our detection limit degrades for smaller separations and is 4-6 mag poorer at a separation of 0.2", corresponding to a projected separation of 30 AU. Inside 0.2" our sensitivity is insufficient to detect substellar companions. To complement the imaging program, extensive spectroscopic observations were obtained with the Center for Astrophysics Digital Speedometers. Four of our targets proved to be spectroscopic binaries, one of them double-lined. We report orbital solutions for these four stars. Our radial velocities support the membership of all our targets to their respective star-forming regions, except for HD 283759, which must be rejected as a member.
Some of the results presented here used observations made with the MMT, a joint facility of the Smithsonian Institution and the University of Arizona.
This publication makes use of data products from the Two Micron All Sky Survey (2MASS), which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation (NSF).

Affiliated with

Also associated with

No associations

Rating

A Search for Substellar Companions around 15 Weak-Lined T Tauri Stars with the Planetary Camera 2 of the Hubble Space Telescope does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Search for Substellar Companions around 15 Weak-Lined T Tauri Stars with the Planetary Camera 2 of the Hubble Space Telescope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Search for Substellar Companions around 15 Weak-Lined T Tauri Stars with the Planetary Camera 2 of the Hubble Space Telescope will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1700859