SOFT-X-RAY OBSERVATIONS OF THE BINARY SIGMA-CR B WITH HEAO-1

被引:8
作者
AGRAWAL, PC
RIEGLER, GR
GARMIRE, GP
机构
[1] Jet Propulsion Laboratory, California Institute of Technology, Pasadena,CA, United States
[2] California Institute of Technology, Pasadena,CA, United States
基金
美国国家航空航天局;
关键词
Astrophysics; -; NASA;
D O I
10.1093/mnras/190.4.853
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A new soft X-ray source H 1613 + 33 has been detected with the Low Energy Detector 1 (LED1) of the HEAO A-2 experiment. The binary a Corona Borealis (σ Cr B), the primary star (HD 143631) of which is a spectroscopic binary of period 1.1 day, lies near the centre of the error box of the source. On the bases of positional coincidence and the resemblance of the optical characteristics of HD 146361 with those of a RS CVn binary, we propose identification of H 1613 + 33 with HD 146361. The observed energy spectrum of the source is consistent with thermal emission from a hot plasma at a temperature of (6.3+9.5-2.3)× {106 K. The observed energy flux of 1.7 × 10 -10 erg cm-2 s-1 in the 0.15-2 keV band corresponds to a luminosity of 1.6× {1031 erg s-1 for a distance of 23 pc. The characteristicsof HD146361 are compared with those of other X-ray emitting RS CVn binaries. It is suggested that the soft X-rays are probably of coronal origin. © 1980 Royal Astronomical Society. Provided by the NASA Astrophysics Data System.
引用
收藏
页码:853 / 859
页数:7
相关论文
共 28 条
  • [1] BATTEN AH, 1967, PUBL DOM ASTROPHYS O, V13, P119
  • [2] SURVEY OF INTER-STELLAR H-I FROM L-ALPHA ABSORPTION-MEASUREMENTS .2.
    BOHLIN, RC
    SAVAGE, BD
    DRAKE, JF
    [J]. ASTROPHYSICAL JOURNAL, 1978, 224 (01) : 132 - 142
  • [3] SURVEY OF H-ALPHA EMISSION IN V711 TAU (HR 1099) AND RELATED CA II EMISSION BINARIES
    BOPP, BW
    TALCOTT, JC
    [J]. ASTRONOMICAL JOURNAL, 1978, 83 (12) : 1517 - 1521
  • [4] EVIDENCE FOR X-RAY-EMISSION FROM CAPELLA
    CATURA, RC
    ACTON, LW
    JOHNSON, HM
    [J]. ASTROPHYSICAL JOURNAL, 1975, 196 (02) : L47 - L49
  • [5] STARSPOTS AS THE CAUSE OF THE INTRINSIC LIGHT VARIATIONS IN RS CANUM VENATICORUM TYPE STARS
    EATON, JA
    HALL, DS
    [J]. ASTROPHYSICAL JOURNAL, 1979, 227 (03) : 907 - 922
  • [6] DISCOVERY OF STRONG RADIO FLARING FROM HR 1099
    FELDMAN, PA
    TAYLOR, AR
    GREGORY, PC
    SEAQUIST, ER
    BALONEK, TJ
    COHEN, NL
    [J]. ASTRONOMICAL JOURNAL, 1978, 83 (12) : 1471 - 1484
  • [7] GARMIRE GP, 1978, P COSPAR S XRAY ASTR
  • [8] GIBSON DM, 1979, IAU3337 CIRC
  • [9] Giclas H. L., 1967, LOWELL OBS B, V7, P49
  • [10] Giclas H. L., 1965, LOWELL OBS B, V6, P155