The Gaia-ESO Survey: projected rotational velocities of B stars in the Carina Nebula

被引：0

作者：

Santos, W. ^{[1
,2
]}

Daflon, S. ^{[1
]}

Silva, J.V. Sales ^{[1
]}

Cunha, K. ^{[1
,3
]}

Blomme, R. ^{[4
]}

Morel, T. ^{[5
]}

Herrero, A. ^{[6
,7
]}

Apellániz, J. Maiz ^{[8
]}

Mahy, L. ^{[4
,5
,9
]}

Berlanas, S.R. ^{[6
,7
]}

Bensby, T. ^{[10
]}

Bragaglia, A. ^{[11
]}

Damiani, F. ^{[12
]}

Frasca, A. ^{[13
]}

Gilmore, G. ^{[14
,15
]}

Kalari, V. ^{[16
]}

Lanzafame, A. ^{[13
]}

Randich, S. ^{[17
]}

Van Eck, S. ^{[17
]}

Zaggia, S. ^{[18
]}

Kerber, L.O. ^{[2
]}

Santrich, O.J. Katime ^{[2
]}

机构：

[1] Observatório Nacional (ON), MCTI, Rua José Cristino, 77, Rio de Janeiro

[2] Universidade Estadual de Santa Cruz, UESC, Rodovia Ilhéus/Itabuna, km 16, Ilhéus

[3] Steward Observatory, University of Arizona, Tucson, 85721, AZ

[4] Royal Observatory of Belgium, Ringlaan 3, Brussels

[5] Space Sciences, Technologies, and Astrophysics Research (STAR) Institute, Université de Liège, Quartier Agora, Bât B5c, Allee du 6 août, 19c, Liège

[6] Instituto de Astrofisica de Canarias, La Laguna, Tenerife

[7] Departamento de Astrofisica, Universidad de La Laguna, La Laguna, Tenerife

[8] Centro de Astrobiologia (CSIC-INTA), ESAC campus, Camino bajo del castillo s/n, Madrid

[9] Instituut voor Sterrenkunde, KU Leuven, Celestijnlaan 200D, Bus 2401, Leuven

[10] Lund Observatory, Division of Astrophysics, Department of Physics, Lund University, Box 118, Lund

[11] INAF, Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, via P. Gobetti 93/3, Bologna

[12] INAF, Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, Palermo

[13] INAF, Osservatorio Astrofisico di Catania, Via S. Sofia 78, Catania

[14] Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge

[15] Institute of Astrophysics, FORTH Cert, N. Plastira 100, Crete

[16] Gemini Observatory, NSF’s NOIRLab, Casilla 603, La Serena

[17] INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, Firenze

[18] INAF, Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, Padova

来源：

Monthly Notices of the Royal Astronomical Society | 2025年 / 541卷 / 02期

基金：

英国科学技术设施理事会;

关键词：

associations: individual: Carina Nebula; open clusters; stars: early-type; stars: rotation;

D O I：

10.1093/mnras/staf912

中图分类号：

学科分类号：

摘要：

The Carina Nebula is an active star-forming region with several open clusters rich in massive OB stars, thus making it an optimal target for studying stellar properties such as rotation for large samples of these early-type stars. We studied a sample of early-type stars probable members of the eight open clusters in the Carina Complex. The observational data consist of high-resolution spectra from the Gaia-ESO public Spectroscopic Survey. Astrometric and photometric data from Gaia EDR3 and radial velocities measured from the observed spectra are used to confirm the cluster members. The projected rotational velocities of 330 early-type stars of Carina are derived from the widths of He I lines at 4388 and 4471 Å. The reported V sin i values are the first estimates for 222 early-type stars. The V sin i distribution for the Carina clusters peaks at ∼100–150 km s−1, consistent with the distributions for B stars in Galactic clusters. V sin i estimates for stars members of the clusters Trumpler 15, Collinder 228, Collinder 232, and Bochum 11 are presented for the first time in the literature. For a subsample of stars with earlier spectral types from B0 to B3, we find a bimodal distribution, with a third, small peak towards the upper values of V sin i. When the full sample is split according to the parent cluster, we find that the oldest cluster in our sample, NGC 3293, presents a higher concentration of rapidly rotating stars. In contrast, Collinder 228 presents a larger number of stars with lower V sin i. © 2025 The Author(s).

引用

页码：1449 / 1471

页数：22

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