The Nearby Evolved Stars Survey III. First data release of JCMT CO-line observations
文献类型：期刊论文
| 作者 | Wallström, S. H.2,3; Scicluna, P.3,4,5,6; Srinivasan, S.3,7; Wouterloot, J. G.8; McDonald, I.9,10; Decock, L.2; Wijshoff, M.2; Chen, R.3,11; Torres, D.12; Umans, L.2 |
| 刊名 | Astronomy and Astrophysics
 |
| 出版日期 | 2025-12-01 |
| 卷号 | 704 |
| 关键词 | stars: AGB and post-AGB stars: carbon circumstellar matter stars: evolution stars: low-mass |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202556298 |
| 产权排序 | 第36完成单位 |
| 文献子类 | Journal article (JA) - |
| 英文摘要 | Low- to intermediate-mass (∼0.8−8 M) evolved stars contribute significantly to the chemical enrichment of the interstellar medium in the local Universe. It is therefore crucial to accurately measure the mass return in their final evolutionary stages. The Nearby Evolved Stars Survey (NESS) is a large multi-telescope project targeting a volume-limited sample of ∼850 stars within 3 kpc in order to derive the dust and gas return rates in the solar neighbourhood, and to constrain the physics underlying these processes. We present an initial analysis of the CO-line observations, including detection statistics, carbon isotopic ratios, initial mass-loss rates, and gas-to-dust ratios. We describe a new data reduction pipeline for homogeneity, which we use to analyse the available NESS CO data from the James Clerk Maxwell Telescope, measuring line parameters and calculating empirical gas mass-loss rates. We present the first release of the available data on 485 sources, one of the largest homogeneous samples of CO data to date. Comparison with a large combined literature sample finds that high mass-loss rate and especially carbon-rich sources are over-represented in literature, while NESS is probing significantly more sources at low mass-loss rates, detecting 59 sources in CO for the first time and providing useful upper limits on non-detections. CO line detection rates are 81% for the CO (2–1) line and 75% for CO (3–2). The majority (82%) of detected lines conform to the expected soft parabola shape, while eleven sources show a double wind. Calculated mass-loss rates show power-law relations with both the dust-production rates and expansion velocities, up to a mass-loss rate saturation value ∼5 × 10−6 M yr−1. Median gas-to-dust ratios of 250 and 680 are found for oxygen-rich and carbon-rich sources, respectively. Our analysis of CO observations in this first data release highlights the importance of our volume-limited approach in characterizing the local AGB population as a whole. © The Authors 2025. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
| WOS关键词 | ASYMPTOTIC GIANT BRANCH ; MASS-LOSS RATES ; SMALL-MAGELLANIC-CLOUD ; AGB STARS ; CIRCUMSTELLAR ENVELOPES ; FUNDAMENTAL PARAMETERS ; INFRARED EXCESSES ; RED SUPERGIANTS ; ISOTOPE RATIOS ; DUST BUDGET |
| 资助项目 | N/A |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001643386000010 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | [AS-IA-106-M03] ; [1285221N] ; [MOST104-2628-M-001-004-MY3] ; [MOST107-2119-M-001-031-MY3] ; [PAPIIT IA104822] ; [PAPIIT IA104824] ; [Consolidator 646758] ; [DE230100183] ; [11873086] ; [NRF-2021R1A2C1008928] ; [2023-1-840-00] ; [NSTC 112-2112-M-001-032-MY3] ; [CEX2020-001058-M] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28810]  |
| 专题 | 云南天文台_其他 |
| 通讯作者 | Srinivasan, S. |
| 作者单位 | 1.Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, United Kingdom 2.Institute of Astronomy, KU Leuven, Celestijnenlaan 200D bus 2401, Leuven, 3001, Belgium; 3.Institute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building, No.1, Sec. 4, Roosevelt Rd., Taipei, 106319, Taiwan; 4.Centre for Astrophysics Research, Department of Physics, Astronomy and Mathematics, University of Hertfordshire, College Lane Campus, Hatfield, AL10 9AB, United Kingdom; 5.European Southern Observatory, Alonso de Cordova, RM, Santiago, 3107, Chile; 6.Space Science Institute, 4750 Walnut Street, Suite 205, Boulder, CO, 80301, United States; 7.Instituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro #8701, Ex-Hda. San José de la Huerta, Michoacán, Morelia, 58089, Mexico; 8.East Asian Observatory (JCMT), 660 N. A’ohoku Place, Hilo, HI, 96720, United States; 9.JBCA, Department Physics and Astronomy, University of Manchester, Manchester, M13 9PL, United Kingdom; 10.School of Physical Sciences, The Open University, Walton Hall, Milton Keynes, MK7 6AA, United Kingdom; |
| 推荐引用方式 GB/T 7714 | Wallström, S. H.,Scicluna, P.,Srinivasan, S.,et al. The Nearby Evolved Stars Survey III. First data release of JCMT CO-line observations[J]. Astronomy and Astrophysics,2025,704. |
| APA | Wallström, S. H..,Scicluna, P..,Srinivasan, S..,Wouterloot, J. G..,McDonald, I..,...&Wesson, R..(2025).The Nearby Evolved Stars Survey III. First data release of JCMT CO-line observations.Astronomy and Astrophysics,704. |
| MLA | Wallström, S. H.,et al."The Nearby Evolved Stars Survey III. First data release of JCMT CO-line observations".Astronomy and Astrophysics 704(2025). |
入库方式： OAI收割
来源：云南天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。