EVIDENCE FOR DYNAMICAL CHANGES IN A TRANSITIONAL PROTOPLANETARY DISK WITH MID-INFRARED VARIABILITY

被引：74

作者：

Muzerolle, James ^{[1
,2
]}

Flaherty, Kevin ^{[2
]}

Balog, Zoltan ^{[2
,3
]}

Furlan, Elise ^{[4
]}

Smith, Paul S. ^{[2
]}

Allen, Lori ^{[5
,6
]}

Calvet, Nuria ^{[7
]}

D'Alessio, Paola ^{[8
]}

Megeath, S. Thomas ^{[9
]}

Muench, August ^{[5
]}

Rieke, George H. ^{[2
]}

Sherry, William H. ^{[10
]}

机构：

[1] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[2] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

[3] Max Planck Inst Astron, D-69117 Heidelberg, Germany

[4] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[5] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[6] Natl Opt Astron Observ, Tucson, AZ 85719 USA

[7] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

[8] UNAM, Ctr Radioastron & Astrofis, Morelia, Michoacan, Mexico

[9] Univ Toledo, Dept Phys & Astron, Toledo, OH 43606 USA

[10] Natl Solar Observ, Tucson, AZ 85719 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2009年 / 704卷 / 01期

关键词：

accretion; accretion disks; planetary systems: protoplanetary disks; stars: pre-main sequence; PRE-MAIN-SEQUENCE; SPITZER-SPACE-TELESCOPE; YOUNG STELLAR OBJECTS; MULTIBAND IMAGING PHOTOMETER; ALL-SKY SURVEY; MASS STARS; INFRARED SPECTROGRAPH; INTERSTELLAR CLOUDS; MOLECULAR CLOUD; C2D SURVEY;

D O I：

10.1088/0004-637X/704/1/L15

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：L15 / L19

页数：5

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