VLBI Imaging and astrometry of the RS CVn binary star IM Pegasi

被引：0
|
作者：
Lebach, DE
Ratner, MI
Shapiro, II
Ransom, RR
Bartel, N
Bietenholz, MF
Lestrade, JF
机构：
[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[2] York Univ, Dept Phys & Astron, N York, ON M3J 1P3, Canada
[3] Observ Paris, F-92195 Meudon, France
来源：
GALAXIES AND THEIR CONSTITUENTS AT THE HIGHEST ANGULAR RESOLUTIONS | 2001年 / 205期
关键词：
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have made 3.6 cm VLBI observations of the RS CVn binary star IM Pegasi (HR 8703) approximately four times per year since 1997 in support of the NASA/Stanford Relativity Gyroscope Experiment (Gravity Probe B). Phase-referenced maps reveal structural changes in the radio emission of the star on hour time scales during several of the sessions. Analyses of the VLBI phase delays with a Kalman-filter estimator reveal submilliarcsecond motions of the radio centroid of the star on hour and even subhour time scales. The observed structural changes and centroid motions often coincide with rapid changes in the star's flux density, as measured with the VLA. We report on our latest results and summarize our findings to date.
引用
收藏
页码：318 / 321
页数：4
相关论文
共 50 条
  • [1] Magnetic field topology of the RS CVn star II Pegasi
    Kochukhov, O.
    Mantere, M. J.
    Hackman, T.
    Ilyin, I.
    ASTRONOMY & ASTROPHYSICS, 2013, 550
  • [2] Magnetic field topology of the RS CVn star II Pegasi
    1600, EDP Sciences (550):
  • [3] The long-period RS CVn binary IM Pegasi II. First surface images
    Berdyugina, SV
    Berdyugin, AV
    Ilyin, I
    Tuominen, I
    ASTRONOMY & ASTROPHYSICS, 2000, 360 (01): : 272 - 280
  • [4] VLBI for Gravity Probe B: the guide star, IM Pegasi
    Bartel, N.
    Bietenholz, M. F.
    Lebach, D. E.
    Ransom, R. R.
    Ratner, M. I.
    Shapiro, I. I.
    CLASSICAL AND QUANTUM GRAVITY, 2015, 32 (22)
  • [5] Distribution and evolution of starspots on the RS CVn binary II Pegasi in 2004
    Xiang, Yue
    Gu, Sheng-hong
    Cameron, A. Collier
    Barnes, J. R.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2014, 438 (03) : 2307 - 2316
  • [6] An orbital solution for RS CVn binary star XY UMa
    Pojmanski, G
    Udalski, A
    ACTA ASTRONOMICA, 1997, 47 (04): : 451 - 466
  • [7] Doppler images of the RS CVn binary II Pegasi during the years 1994-2002
    Lindborg, M.
    Korpi, M. J.
    Hackman, T.
    Tuominen, I.
    Ilyin, I.
    Piskunov, N.
    ASTRONOMY & ASTROPHYSICS, 2011, 526
  • [8] Starspot activity on the RS CVn-type binary II Pegasi during 1999-2001
    Gu, SH
    Tan, HS
    Wang, XB
    Shan, HG
    ASTRONOMY & ASTROPHYSICS, 2003, 405 (02) : 763 - 768
  • [9] First Doppler imaging of the RS CVn binary FF UMa
    Senavci, H., V
    Bahar, E.
    Ozavci, I
    Kilicoglu, T.
    CONTRIBUTIONS OF THE ASTRONOMICAL OBSERVATORY SKALNATE PLESO, 2020, 50 (02): : 594 - 600
  • [10] RS CVn binary IM Peg - investigation of stellar activity and surface flows
    Korhonen, Heidi
    Weber, Michael
    Wittkowski, Markus
    Granzer, Thomas
    Strassmeier, Klaus G.
    SOLAR AND STELLAR VARIABILITY: IMPACT ON EARTH AND PLANETS, 2010, (264): : 267 - +
12345