Three very young HgMn stars in the Orion OB1 association

被引：15
|
作者：
Woolf, VM
Lambert, DL
机构：
[1] Univ Texas, Dept Astron, Austin, TX 78712 USA
[2] Univ Texas, McDonald Observ, Austin, TX 78712 USA
来源：
ASTROPHYSICAL JOURNAL | 1999年 / 520卷 / 01期
基金：
美国国家科学基金会;
关键词：
open clusters and associations : individual (Orion OB1); stars : abundances; stars : chemically peculiar; stars; individual; (BD-0; degrees; 984; HD; 37492; 37886);
D O I：
10.1086/312146
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report the detection of three mercury-manganese stars in the Orion OB1 association. HD 37886 and ED -0 degrees 984 are in the approximately 1.7 million year old Orion OB1b. HD 37492 is in the approximately 4.6 million year old Orion OB1c. Orion OB1b is now the youngest cluster with known HgMn star members. This places an observational upper limit on the timescale needed to produce the chemical peculiarities seen in mercury-manganese stars, which should help in the search for the cause or causes of the peculiar abundances in HgMn and other chemically peculiar upper main-sequence stars.
引用
收藏
页码：L55 / L58
页数：4
相关论文
共 50 条
  • [41] The massive binaries in Car OB1 association
    Solivella, GR
    Niemela, VS
    WORKSHOP ON HOT STARS IN OPEN CLUSTERS OF THE GALAXY AND THE MAGELLANIC CLOUDS, 1999, 8 : 145 - 147
  • [42] Brown dwarf and very low mass stars search in Orion Ob1a and OB1b asociations
    Downes, J. J.
    Briceno, C.
    Hernandez, J.
    XI IAU REGIONAL LATIN AMERICAN MEETING OF ASTRONOMY, 2006, 26 : 37 - +
  • [43] Comparing the spatial and kinematic distribution of gas and young stars around the shell-like structure in the CMa OB1 association
    Gregorio-Hetem, J.
    Lefloch, B.
    Hetem, A.
    Montmerle, T.
    Fernandes, B.
    Mendoza, E. F.
    De Simone, M.
    ASTRONOMY & ASTROPHYSICS, 2021, 654
  • [44] The multiplicity of massive stars in the Scorpius OB1 association through high-contrast imaging
    Pauwels, T.
    Reggiani, M.
    Sana, H.
    Rainot, A.
    Kratter, K.
    ASTRONOMY & ASTROPHYSICS, 2023, 678
  • [45] Interstellar bubbles surrounding O and Of stars in Per OB1
    Cappa, C
    Herbstmeier, U
    STARS, GAS AND DUST IN GALAXIES: EXPLORING THE LINKS, PROCEEDINGS, 2000, 221 : 37 - 40
  • [46] Neutral hydrogen observations of three Wolf-Rayet stars and one supernova remnant towards the CYG OB1 association
    Pineault, S
    GaumontGuay, S
    Madore, B
    ASTRONOMICAL JOURNAL, 1996, 112 (01): : 201 - &
  • [47] Runaways and shells around the CMa OB1 association
    Fernandes, B.
    Montmerle, T.
    Santos-Silva, T.
    Gregorio-Hetem, J.
    ASTRONOMY & ASTROPHYSICS, 2019, 628
  • [48] The Ara OB1 association and its molecular complex
    Arnal, EM
    Romero, GA
    May, J
    Minniti, D
    COOL UNIVERSE: OBSERVING COSMIC DAWN, 2005, 344 : 173 - 178
  • [49] AN INFRARED SUPERSHELL SURROUNDING THE CYGNUS OB1 ASSOCIATION
    SAKEN, JM
    SHULL, JM
    GARMANY, CD
    NICHOLSBOHLIN, J
    FESEN, RA
    ASTROPHYSICAL JOURNAL, 1992, 397 (02): : 537 - 541
  • [50] A HIERARCHY OF WINDBLOWN SHELLS IN THE CYGNUS OB1 ASSOCIATION
    LOZINSKAYA, TA
    SITNIK, TG
    SOVIET ASTRONOMY LETTERS, 1988, 14 (02): : 100 - 103
12345