The nature of faint companions to G-type stars from adaptive optics

被引：5
|
作者：
Chakraborty, A [1 ]
Ge, J [1 ]
Debes, JH [1 ]
机构：
[1] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
来源：
ASTRONOMICAL JOURNAL | 2002年 / 124卷 / 02期
关键词：
instrumentation : high angular resolution; stars; low-mass; brown dwarfs; techniques : photometric;
D O I：
10.1086/341378
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
High spatial resolution (0."30) near-IR photometric observations using the adaptive optics of the Mount Wilson 100 inch (2.5 m) telescope and the Penn State IR Imager and Spectrograph have revealed faint companions to HD 190067 and HIP 13855. HD 190067B is found to be of mass 0.075-0.1 M-circle dot with an age from 0.5 Gyr to a few gigayears. HIP 13855B is a low-mass star (age 100-500 Myr) of mass between 0.1 and 0.2 M-circle dot. Further near-IR spectroscopic observations will be necessary to classify their spectral types precisely.
引用
收藏
页码：1127 / 1131
页数：5
相关论文
共 50 条
  • [31] Initial results from the Palomar Adaptive Optics Survey of Young solar-type stars: A brown dwarf and three stellar companions
    Metchev, SA
    Hillenbrand, LA
    ASTROPHYSICAL JOURNAL, 2004, 617 (02): : 1330 - 1346
  • [32] MK CLASSIFICATIONS FOR F-TYPE AND G-TYPE STARS .3.
    HARLAN, EA
    ASTRONOMICAL JOURNAL, 1974, 79 (06): : 682 - 686
  • [33] THE ROTATIONAL VELOCITIES OF A-TYPE, F-TYPE, AND G-TYPE GIANT STARS
    OKE, JB
    GREENSTEIN, JL
    ASTROPHYSICAL JOURNAL, 1954, 120 (03): : 384 - 390
  • [34] CARBON AND IRON ABUNDANCES FOR 20 F-TYPE AND G-TYPE STARS
    HEARNSHAW, JB
    ASTRONOMY & ASTROPHYSICS, 1974, 36 (02) : 191 - 199
  • [35] Brown dwarf companions to G-type stars. I. Gliese 417b and Gliese 584C
    Kirkpatrick, JD
    Dahn, CC
    Monet, DG
    Reid, IN
    Gizis, JE
    Liebert, J
    Burgasser, AJ
    ASTRONOMICAL JOURNAL, 2001, 121 (06): : 3235 - 3253
  • [36] MK CLASSIFICATIONS FOR F-TYPE AND G-TYPE STARS .4.
    HARLAN, EA
    ASTRONOMICAL JOURNAL, 1981, 86 (12): : 1896 - 1897
  • [37] MK CLASSIFICATIONS FOR F-TYPE AND G-TYPE STARS .2.
    HARLAN, EA
    TAYLOR, DC
    ASTRONOMICAL JOURNAL, 1970, 75 (02): : 165 - &
  • [38] COLORS OF G-TYPE AND K-TYPE GIANT STARS .1.
    GUSTAFSSON, B
    BELL, RA
    ASTRONOMY & ASTROPHYSICS, 1979, 74 (03) : 313 - 352
  • [39] CORONAL ACTIVITY IN F-TYPE, G-TYPE AND K-TYPE STARS
    MEWE, R
    SCHRIJVER, CJ
    ZWAAN, C
    SPACE SCIENCE REVIEWS, 1981, 30 (1-4) : 191 - 199
  • [40] Rotation and differential rotation in field F- and G-type stars
    Reiners, A
    Schmitt, JHMM
    ASTRONOMY & ASTROPHYSICS, 2003, 398 (02) : 647 - 661
12345