تقرير
Evidence for Early Circumstellar Disk Evolution in NGC 2068/71
| العنوان: | Evidence for Early Circumstellar Disk Evolution in NGC 2068/71 |
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| المؤلفون: | Flaherty, K. M., Muzerolle, J. |
| المصدر: | Astron.J.135:966-983,2008 |
| سنة النشر: | 2007 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics |
| الوصف: | We study the disk and accretion properties of young stars in the NGC 2068 and NGC 2071 clusters. Using low-resolution optical spectra, we define a membership sample and determine an age for the region of ~2 Myr. Using high-resolution spectra of the H-alpha line we study the accretion activity of these likely members and also examine the disk properties of the likely members using IRAC and MIPS mid-infrared photometry. A substantial fraction (79%) of the 67 members have an infrared excess while all of the stars with significant infrared excess show evidence for active accretion. We find three populations of evolved disks (IRAC-weak, MIPS-weak and transition disks) all of which show decreased accretion activity in addition to the evidence for evolution in the dust disk. Comment: 44 pages (20 pages of text), 16 figures, 5 tables |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/0004-6256/135/3/966 |
| URL الوصول: | http://arxiv.org/abs/0712.1601 |
| رقم الأكسشن: | edsarx.0712.1601 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/0004-6256/135/3/966 |
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