期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 704, 期 1, 页码 L15-L19出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/704/1/L15
关键词
accretion, accretion disks; planetary systems: protoplanetary disks; stars: pre-main sequence
资金
- NASA [1407, 960785]
We present multi-epoch Spitzer Space Telescope observations of the transitional disk LRLL 31 in the 2-3 Myr old star-forming region IC 348. Our measurements show remarkable mid-infrared variability on timescales as short as one week. The infrared continuum emission exhibits systematic wavelength-dependent changes that suggest corresponding dynamical changes in the inner disk structure and variable shadowing of outer disk material. We propose several possible sources for the structural changes, including a variable accretion rate or a stellar or planetary companion embedded in the disk. Our results indicate that variability studies in the infrared can provide important new constraints on protoplanetary disk behavior.
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