The nature of isolated T Tauri stars

Details The nature of isolated T Tauri stars The nature of isolated T Tauri stars

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...336..242h&link_type=abstract

Astronomy and Astrophysics, v.336, p.242-250 (1998)

Astronomy and Astrophysics

Astrophysics

23

Stars: Formation, Stars: Pre-Main Sequence, Stars: Individual: Tw Hya, Stars: Individual: Cod-29Degr 8887, Stars: Individual: Hd 98800, X-Rays: Stars

Scientific paper

We present the results of a search for young stellar objects around the two isolated T Tauri stars (TTSs) TW Hya and CoD-29degr 8887. From the spectroscopic properties of these two objects, it is obvious that they are T Tauri stars, although they are not associated with a star-forming region as it is the case for most of the known TTSs. Especially TW Hya is the only classical TTS that is not located in a dark cloud with star formation activity. The same is true for the weak-line T Tauri star CoD-29degr 8887. We searched for pre-main sequence stars using ROSAT PSPC observations pointing at our two main targets. With a sophisticated search strategy we could identify 107 X-ray sources in our fields. For the 37 stellar-like optical counterparts we did spectroscopic follow-up observations. These show that within the viewing field of ROSAT there are no other X-ray emitting young stellar objects around TW Hya and CoD-29degr 8887. For the isolated TTSs TW Hya and HD 98800 Hipparcos parallax measurements are available locating them at distances of 56 and 46pc, respectively. This means that they are the closest TTSs with circumstellar dusty disks known today. The space velocities of these two objects are 3-5km/sec. From their position in the HR diagram, we obtained an age of about 10(7) years. Hence, we conclude that these two objects travelled not far away from their original birthplace and their parental molecular cloud dispersed meanwhile. This is the solution why these T Tauri stars appear to be isolated. Based on observations obtained at the European Southern Observatory, La Silla, Chile

Affiliated with

Also associated with

No associations

Rating

The nature of isolated T Tauri stars 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 The nature of isolated T Tauri stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The nature of isolated T Tauri stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1573602