Red supergiant stars in the Large Magellanic Cloud II. Infrared properties and mid-infrared variability
文献类型：期刊论文
| 作者 | Yang, Ming2; Bonanos, Alceste Z.2; Jiang, Bi-Wei3; Gao, Jian3; Xue, Meng-Yao4; Wang, Shu1; Lam, Man I.5; Spetsieri, Zoi T.2; Ren, Yi3; Gavras, Panagiotis2 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2018-09-11 |
| 卷号 | 616 |
| ISSN号 | 1432-0746 |
| 关键词 | Infrared: Stars Magellanic Clouds Stars: Late-type Stars: Massive Stars: Mass-loss Stars: Variables: General |
| DOI | 10.1051/0004-6361/201832833 |
| 英文摘要 | The characteristics of infrared properties and mid-infrared (MIR) variability of red supergiant (RSG) stars in the Large Magellanic Cloud (LMC) are analyzed based on 12 bands of near-infrared (NIR) to MIR co-added data from 2MASS, Spitzer and WISE, and similar to 6.6 yr of MIR time-series data collected by the ALLWISE and NEOWISE-R projects. 773 RSGs candidates were compiled from the literature and verified by using the color-magnitude diagram (CMD), spectral energy distribution (SED) and MIR variability. About 15% of valid targets in the IRAC1-IRAC2/IRAC2-IRAC3 diagram may show polycyclic aromatic hydrocarbon (PAH) emission. We show that arbitrary dereddening Q parameters related to the IRAC4, S9W, WISE3, WISE4, and MIPS24 bands could be constructed based on a precise measurement of MIR interstellar extinction law. Several peculiar outliers in our sample are discussed, in which one outlier might be a RSG right before the explosion or an extreme asymptotic giant branch (AGB) star in the very late evolutionary stage based on the MIR spectrum and photometry. There are 744 identified RSGs in the final sample having both the WISE1- and WISE2-band time-series data. The results show that the MIR variability is increasing along with the increasing of brightness. There is a relatively tight correlation between the MIR variability, mass loss rate (MLR; in terms of K-S-WISE3 color), and the warm dust or continuum (in terms of WISE4 magnitude/flux), where the MIR variability is evident for the targets with K-S-WISE3 > 1.0 mag and WISE4 < 6.5 mag, while the rest of the targets show much smaller MIR variability. The MIR variability is also correlated with the MLR for which targets with larger variability also show larger MLR with an approximate upper limit of -6.1 M-circle dot yr(-1). Both the variability and the luminosity may be important for the MLR since the WISE4-band flux is increasing exponentially along with the degeneracy of luminosity and variability. The identified RSG sample has been compared with the theoretical evolutionary models and shown that the discrepancy between observation and evolutionary models can be mitigated by considering both variability and extinction. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | EDP SCIENCES S A |
| WOS记录号 | WOS:000444245500001 |
| 源URL | [http://119.78.226.72/handle/331011/32245]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Yang, Ming |
| 作者单位 | 1.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 2.Natl Observ Athens, Inst Astron Astrophys Space Applicat & Remote Sen, Penteli 15236, Greece 3.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 4.Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia 5.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Ming,Bonanos, Alceste Z.,Jiang, Bi-Wei,et al. Red supergiant stars in the Large Magellanic Cloud II. Infrared properties and mid-infrared variability[J]. ASTRONOMY & ASTROPHYSICS,2018,616. |
| APA | Yang, Ming.,Bonanos, Alceste Z..,Jiang, Bi-Wei.,Gao, Jian.,Xue, Meng-Yao.,...&Gavras, Panagiotis.(2018).Red supergiant stars in the Large Magellanic Cloud II. Infrared properties and mid-infrared variability.ASTRONOMY & ASTROPHYSICS,616. |
| MLA | Yang, Ming,et al."Red supergiant stars in the Large Magellanic Cloud II. Infrared properties and mid-infrared variability".ASTRONOMY & ASTROPHYSICS 616(2018). |
入库方式： OAI收割
来源：上海天文台
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