Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:astro-ph/9708257)
· References in the article
· Citations to the Article (19) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (8)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The Transitional Pre--Main-Sequence Object DI Tauri: Evidence for a Substellar Companion and Rapid Disk Evolution
Authors:
Meyer, Michael R.; Beckwith, S. V. W.; Herbst, T. M.; Robberto, M.
Publication:
Astrophysical Journal Letters v.489, p.L173 (ApJL Homepage)
Publication Date:
11/1997
Origin:
APJ
ApJ Keywords:
BINARIES: CLOSE, CIRCUMSTELLAR MATTER, STARS: LOW-MASS, BROWN DWARFS, STARS: PRE-MAIN-SEQUENCE
DOI:
10.1086/316780
Bibliographic Code:
1997ApJ...489L.173M

Abstract

We report mid-IR observations of two young stars found in the Taurus dark cloud, spatially resolving for the first time their 10 mu m emission. The weak-emission T Tauri star DI Tau, tentatively identified by Skrutskie et al. on the basis of 12 mu m IRAS data as an object in the process of dissipating its circumstellar disk, is found to have no infrared excess at a wavelength of 10 mu m. The nearby classical T Tauri star DH Tau exhibits excess emission at 10 mu m consistent with predictions based on circumstellar disk models. While both objects appear to have the same stellar mass, age, and rotation rate, they differ in two fundamental respects: DH Tau is a single star with an active accretion disk, and DI Tau is a binary system lacking such a disk. The companion to DI Tau has a very low luminosity and is located at a projected distance of ~20 AU from the primary. Assuming the system to be coeval, we derive a mass below the hydrogen burning limit for the companion. We speculate that the formation of a substellar mass companion has led to the rapid evolution of the circumstellar disk that may have surrounded DI Tau.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints