Optical Variability of the T Tauri Star HH 30 IRS | Zendy

Kenneth Wood | Zendy; S. J. Wolk | Zendy; K. Z. Stanek | Zendy; George Leussis | Zendy; Keivan G. Stassun | Zendy; M. J. Wolff | Zendy; B. A. Whitney | Zendy

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Optical Variability of the T Tauri Star HH 30 IRS

Author(s) -

Kenneth Wood,

S. J. Wolk,

K. Z. Stanek,

George Leussis,

Keivan G. Stassun,

M. J. Wolff,

B. A. Whitney

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/312920

Subject(s) - photometry (optics) , astrophysics , physics , t tauri star , hubble space telescope , circumstellar disk , astronomy , stars

We report results of VRI photometric monitoring of the T Tauri star plus disksystem HH30. We find that HH30 is highly variable over timescales of a few dayswith Delta V~1.5 mag, Delta I~1.1 mag. Furthermore we find hints of periodicitywith periodograms indicating possible periods of 11.6 and 19.8 days. The VRIphotometry is available through the anonymous ftp service. We model thevariability with Monte Carlo radiation transfer simulations for a spotted starplus disk system and find that the large variability is best reproduced with asingle hot spot and circumstellar grains that are larger than typicalinterstellar grains. The apparent existence of a single hot spot and the needfor larger, more forward throwing grains is consistent with previous modelingof HST imagery.Comment: 7 pages, 3 figures. Accepted for ApJ Letter

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