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/0606164)
· References in the article
· Citations to the Article (3) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (3)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Evidence for Differential Rotation on a T Tauri Star
Authors:
Herbst, William; Dhital, Saurav; Francis, Alice; Lin, LiWei; Tresser, Nyla; Williams, Eric
Affiliation:
AA(Astronomy Department, Wesleyan University, Middletown, CT 06459; , , .), AB(Physics and Astronomy Department, Swarthmore College, Swarthmore, PA 19081; .), AC(Physics Department, Hamilton College, Clinton, NY 13323; .), AD(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138; .), AE(Astronomy Department, Wesleyan University, Middletown, CT 06459; , , .), AF(Astronomy Department, Wesleyan University, Middletown, CT 06459; , , .)
Publication:
The Publications of the Astronomical Society of the Pacific, Volume 118, Issue 844, pp. 828-832. (PASP Homepage)
Publication Date:
06/2006
Origin:
UCP
PASP Keywords:
Stars: Pre-Main-Sequence, Stars: Rotation, Stars: Spots
Abstract Copyright:
(c) 2006: The Astronomical Society of the Pacific
DOI:
10.1086/506481
Bibliographic Code:
2006PASP..118..828H

Abstract

Five years of photometric monitoring of the T Tauri star HBC 338 in NGC 1333 has revealed that it is a periodic variable, but the period has changed significantly with time. From 2000 to 2003, a period near 5.6 days was observed, while in the last two seasons, the dominant period is near 4.6 days. No other T Tauri star has been seen to change its period by such a large percentage. We propose a model in which a differentially rotating star is seen nearly equator-on and a high-latitude spot has gradually been replaced by a low-latitude spot. We show that this model provides an excellent fit to the observed shapes of the light curves at each epoch. The amplitude and sense of the inferred differential rotation are similar to what is seen on the Sun. This may be surprising, given the likely high degree of magnetic surface activity on the star relative to the Sun, but we note that HBC 338 is clearly an exceptional T Tauri star.
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
    


SAO/NASA ADS Homepage | ADS Sitemap | Query Form | Basic Search | Preferences | HELP | FAQ