The rotation speed of the companion star in V395 CAR (=2S0921-630)

Bibcode
1999A&A...344..101S
Shahbaz, T.; Kuulkers, E.; Charles, P. A.; van der Hooft, F.; Casares, J.; van Paradijs, J.
Bibliographical reference

Astronomy and Astrophysics, v.344, p.101-104 (1999)

Advertised on:
4
1999
Journal
Astronomy and Astrophysics
Number of authors
6
IAC number of authors
1
Citations
17
Refereed citations
16
Description
We have obtained high resolution optical spectroscopy of the accretion disc corona source 2S0921-630 (=V395 Car) that constrains the spectral type of the companion star to be most probably K0iii. At 6500 Angstroms the secondary star is found to contribute ~ 25% to the observed flux. The absorption line spectrum of the K0iii companion star is broadened (compared to template stars) by a projected rotational velocity of 65+/-9 km s(-1) (1-sigma ).
Type
Refereed

It may interest you

  • Refereed
    TESS and ESPRESSO discover a super-Earth and a mini-Neptune orbiting the K-dwarf TOI-238*
    The number of super-Earth and mini-Neptune planet discoveries has increased significantly in the last two decades thanks to transit and radial velocity (RV) surveys. When it is possible to apply both techniques, we can characterise the internal composition of exoplanets, which in turn provides unique insights on their architecture, formation and
    D'Odorico, V. et al.

    Advertised on:

    5
    2024
    Bibcode
    2024A&A...685A..56S
    Citations
    0
  • Refereed
    Dramatic Drop in the X-Ray Polarization of Swift J1727.8–1613 in the Soft Spectral State
    Black hole X-ray binaries exhibit different spectral and timing properties in different accretion states. The X-ray outburst of a recently discovered and extraordinarily bright source, Swift J1727.8–1613, has enabled the first investigation of how the X-ray polarization properties of a source evolve with spectral state. The 2–8 keV polarization
    Svoboda, Jiří et al.

    Advertised on:

    5
    2024
    Bibcode
    2024ApJ...966L..35S
    Citations
    0
  • Refereed
    Overmassive Black Holes at Cosmic Noon: Linking the Local and the High-redshift Universe
    We report for the first time a sample of 12 supermassive black holes (SMBHs) hosted by low-mass galaxies at cosmic noon, i.e., in a redshift range consistent with the peak of star formation history: z ∼ 1–3. These black holes are 2 orders of magnitude too massive for the stellar content of their hosts when compared with the local relation for
    Mezcua, Mar et al.

    Advertised on:

    5
    2024
    Bibcode
    2024ApJ...966L..30M
    Citations
    0