Yadav, Ram Kesh ; Pandey, A. K. ; Sharma, Saurabh ; Ojha, D. K. ; Samal, M. R. ; Mallick, K. K. ; Jose, J. ; Ogura, K. ; Richichi, Andrea ; Irawati, Puji ; Kobayashi, N. ; Eswaraiah, C. (2016) A multiwavelength investigation of the H ii region S311: young stellar population and star formation Monthly Notices of the Royal Astronomical Society, 461 (3). pp. 2502-2518. ISSN 0035-8711
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Official URL: https://academic.oup.com/mnras/article-abstract/46...
Related URL: http://dx.doi.org/10.1093/mnras/stw1356
Abstract
We present a multiwavelength investigation of the young stellar population and star formation activities around the H ii region Sharpless 311. Using our deep near-infrared observations and archival Spitzer-IRAC observations, we have detected a total of 125 young stellar objects (YSOs) in an area of ∼86 arcmin2. The YSO sample includes eight Class I and 117 Class II candidate YSOs. The mass completeness of the identified YSO sample is estimated to be 1.0 M⊙. The ages and masses of the majority of the candidate YSOs are estimated to be in the range ∼0.1–5 Myr and ∼0.3–6 M⊙, respectively. The 8-μm image of S311 displays an approximately spherical cavity around the ionizing source, which was possibly created by the expansion of the H ii region. The spatial distribution of the candidate YSOs reveals that a significant number of them are distributed systematically along the 8-μm emission with a majority clustered around the eastern border of the H ii region. Four clumps/compact H ii regions are detected in the radio continuum observations at 1280 MHz, which may have been formed during the expansion of the H ii region. The estimated dynamical age of the region, main-sequence lifetime of the ionizing source, the spatial distribution and ages of the candidate YSOs indicate triggered star formation in the complex.
Item Type: | Article |
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Source: | Copyright of this article belongs to Royal Astronomical Society. |
Keywords: | Stars: Clusters; Star Clusters: Individual (Haffner 18); Stars: Formation; Stars: Pre-Main Sequence; ISM: H ii Regions; ISM: Individual Objects: S311 |
ID Code: | 104082 |
Deposited On: | 16 May 2017 11:34 |
Last Modified: | 16 May 2017 11:34 |
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