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
  • [11] Disk evolution in the Orion OB1 association
    Calvet, N
    Briceño, C
    Hernández, J
    Hoyer, S
    Hartmann, L
    Sicilia-Acuilar, A
    Megeath, ST
    D'Alessio, P
    ASTRONOMICAL JOURNAL, 2005, 129 (02): : 935 - 946
  • [12] SPECTROSCOPIC BINARIES IN THE ORION OB1 ASSOCIATION
    MORRELL, N
    LEVATO, H
    ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1991, 75 (04): : 965 - 985
  • [13] Massive Magnetic CP Stars in the Orion OB1 Association: Subgroup 1a
    Romanyuk, I. I.
    Semenko, E. A.
    Moiseeva, A. V.
    Yakunin, I. A.
    Kudryavtsev, D. O.
    PHYSICS OF MAGNETIC STARS, 2019, 518 : 3 - 17
  • [14] Magnetic Fields of CP Stars in the Orion OB1 Association. III. Stars of Subgroup (a)
    I. I. Romanyuk
    E. A. Semenko
    A. V. Moiseeva
    I. A. Yakunin
    D. O. Kudryavtsev
    Astrophysical Bulletin, 2019, 74 : 55 - 61
  • [15] Magnetic Fields of CP Stars in the Orion OB1 Association. III. Stars of Subgroup (a)
    Romanyuk, I. I. z
    Semenko, E. A.
    Moiseeva, A. V.
    Yakunin, I. A.
    Kudryavtsev, D. O.
    ASTROPHYSICAL BULLETIN, 2019, 74 (01) : 55 - 61
  • [16] THE ORION OB1 ASSOCIATION .1. STELLAR CONTENT
    BROWN, AGA
    DEGEUS, FJ
    DEZEEUW, PT
    ASTRONOMY & ASTROPHYSICS, 1994, 289 (01) : 101 - 120
  • [17] Spitzer observations of the Orion OB1 association:: Disk census in the low-mass stars
    Hernandez, Jesus
    Calvet, Nuria
    Briceno, C.
    Hartmann, L.
    Vivas, A. K.
    Muzerolle, J.
    Downes, J.
    Allen, L.
    Gutermuth, R.
    ASTROPHYSICAL JOURNAL, 2007, 671 (02): : 1784 - 1799
  • [18] THE ORION OB1 ASSOCIATION .2. THE ORION-ERIDANUS BUBBLE
    BROWN, AGA
    HARTMANN, D
    BURTON, WB
    ASTRONOMY & ASTROPHYSICS, 1995, 300 (03) : 903 - 922
  • [19] Redshifted diffuse interstellar bands in the Orion OB1 association
    Krelowski, J.
    Galazutdinov, G. A.
    Mulas, G.
    Maszewska, M.
    Cecchi-Pestellini, C.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2015, 451 (03) : 3210 - 3218
  • [20] Magnetic Fields of CP Stars in the Orion OB1 Association. V. Stars of Subgroups (c) and (d)
    I. I. Romanyuk
    E. A. Semenko
    A. V. Moiseeva
    I. A. Yakunin
    D. O. Kudryavtsev
    Astrophysical Bulletin, 2021, 76 : 163 - 184
12345