FLAMES spectroscopy of low-mass stars in the young clusters σ Ori and Ori

被引：0
|
作者：
Sacco, G.G. [1 ,2 ]
Franciosini, E. [1 ]
Randich, S. [4 ]
Pallavicini, R. [1 ,3 ]
机构：
[1] INAF, Osservatorio Astronomico di Palermo, Piazza del Parlamento, 1, 90134 Palermo, Italy
[2] Consorzio COMETA, via S. Sofia, 64, 95123 Catania, Italy
[3] INAF, Headquarters, viale del Parco Mellini 84, 00136 Roma, Italy
[4] INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi, 50125 Firenze, Italy
来源：
Astronomy and Astrophysics | 2008年 / 488卷 / 01期
关键词：
Aims. We performed a detailed membership selection and studied the accretion properties of low-mass stars in the two apparently very similar young (1-10 Myr) clusters Ori and Ori. Methods. We observed 98 and 49 low-mass (0.2-1.0 ) stars in Ori and Ori respectively; using the multi-object optical spectrograph FLAMES at the VLT; with the high-resolution () HR15N grating (6470-6790 Å). We used radial velocities; Li and H to establish cluster membership and H and other optical emission lines to analyze the accretion properties of members.Results. We identified 65 and 45 members of the Ori and Ori clusters; respectively; and discovered 16 new candidate binary systems. We also measured rotational broadening for 20 stars and estimated the mass accretion rates in 25 stars of the Ori cluster; finding values between and yr and in 4 stars of the Ori cluster; finding values between and yr. Comparing our results with the infrared photometry obtained by the Spitzer satellite; we find that the fraction of stars with disks and the fraction of active disks is larger in the Ori cluster (% and %) than in Ori (% and %). Conclusions. The different disk and accretion properties of the two clusters could be due either to the effect of the high-mass stars and the supernova explosion in the Ori cluster or to different ages of the cluster populations. Further observations are required to draw a definitive conclusion. © 2008 ESO;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Journal article (JA)
引用
收藏
页码：167 / 179
相关论文
共 50 条
  • [21] Low-mass stars pull weight in globular clusters
    不详
    ASTRONOMY & GEOPHYSICS, 2012, 53 (01) : 6 - 6
  • [22] Extreme Coronal Mass Ejections in Young Low-Mass Stars
    Aarnio, A. N.
    Stassun, K. G.
    Matt, S. P.
    Hughes, W. J.
    McGregor, S. L.
    16TH CAMBRIDGE WORKSHOP ON COOL STARS, STELLAR SYSTEMS AND THE SUN, 2012, 448 : 43 - 51
  • [23] The population of young low-mass stars in Trumpler 14
    Itrich, Dominika
    Testi, Leonardo
    Beccari, Giacomo
    Manara, Carlo F.
    Reiter, Megan
    Preibisch, Thomas
    Mcleod, Anna F.
    Rosotti, Giovanni
    Klessen, Ralf
    Molinari, Sergio
    Hennebelle, Patrick
    ASTRONOMY & ASTROPHYSICS, 2024, 685
  • [24] MAGNETIC ACTIVITY AND EVOLUTION OF LOW-MASS YOUNG STARS
    MONTMERLE, T
    IAU SYMPOSIA, 1990, (137): : 363 - 370
  • [25] Spitzer spectroscopy of low-mass stars and brown dwarfs
    Cushing, MC
    Marley, MS
    Roellig, TL
    PROCEEDINGS OF THE 13TH CAMBRIDGE WORKSHOP ON COOL STARS, STELLAR SYSTEMS AND THE SUN - PROCEEDINGS, VOLS 1 AND 2, 2005, 560 : 245 - 248
  • [26] OPTICAL SPECTROSCOPY OF VERY LOW-MASS STARS IN THE PLEIADES
    HAMILTON, D
    STAUFFER, JR
    ASTRONOMICAL JOURNAL, 1993, 105 (05): : 1855 - 1859
  • [27] LOW-MASS STARS
    JAHREISS, H
    ASTROPHYSICS AND SPACE SCIENCE, 1994, 217 (1-2) : 63 - 68
  • [28] Low-mass stars and star clusters in the dark Galactic halo
    Kerins, EJ
    ASTRONOMY & ASTROPHYSICS, 1997, 328 (01) : 5 - 11
  • [29] The Effects of Starspots on Spectroscopic Mass Estimates of Low-mass Young Stars
    Flores, C.
    Connelley, M. S.
    Reipurth, B.
    Duchene, G.
    ASTROPHYSICAL JOURNAL, 2022, 925 (01):
  • [30] ACCRETION ONTO PLANETARY MASS COMPANIONS OF LOW-MASS YOUNG STARS
    Zhou, Yifan
    Herczeg, Gregory J.
    Kraus, Adam L.
    Metchev, Stanimir
    Cruz, Kelle L.
    ASTROPHYSICAL JOURNAL LETTERS, 2014, 783 (01)
12345