T Tauri stars: wild as dust.
Abstract
This review focuses on the T Tauri stars, their surroundings, and their common evolution toward the main sequence. Aspects of current interest that are discussed in some detail are the photospheric properties of T Tauri stars and their solar-type outer atmospheres, recent evidence for circumstellar (possibly protoplanetary) disks around classical T Tauri stars (CTTS), and the mass outflows of CTTSs. While this outline may seem to imply both that there are such (almost independent) stellar and circumstellar layers and that we are able to distinguish between them, neither is really the case. The adopted presentation is merely convenient when comparing T Tauri stars with other late-type stars and with embedded objects. And even though a framework has emerged over the last few years that now offers more hope of eventually understanding a much wi(l)der range of T Tauri properties than earlier models have been capable of, allowance is of course made for deviance in both behavior and interpretation throughout this review.
- Publication:
-
Annual Review of Astronomy and Astrophysics
- Pub Date:
- 1989
- DOI:
- 10.1146/annurev.aa.27.090189.002031
- Bibcode:
- 1989ARA&A..27..351B
- Keywords:
-
- Cosmic Dust;
- Stellar Evolution;
- T Tauri Stars;
- Astronomical Models;
- Photosphere;
- Spectral Energy Distribution;
- Stellar Envelopes;
- Stellar Mass;
- Stellar Mass Accretion;
- Astrophysics;
- T Tauri Stars: Circumstellar Disks;
- T Tauri Stars: Mass Flow;
- T Tauri Stars: Stellar Atmospheres