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14 Comae Berenices

Star in the constellation Coma Berenices

Star in the constellation Coma Berenices

| b-v = | u-b = +0.18

14 Comae Berenices is a single star in the northern constellation of Coma Berenices, and is the second brightest member of the Coma Star Cluster. It is a faint star but visible to the naked eye with an apparent visual magnitude of 4.95. Parallax measurements place the star at a distance of about 289 light years.

The spectrum of this star is peculiar and it has been assigned a number of different stellar classifications: A5, F0p, F0 III Sr, F0 vp, F1 IV: np Sr shell, A9 IV np Sr II, F1 IV, and A9 V + shell. Abt & Morrell (1995) designated this a Lambda Boötis star but this was later refuted. No surface magnetic field has been detected on 14 Comae Berenices.

14 Comae Berenices is a well-known shell star with a high rate of spin, showing a projected rotational velocity of 226 km/s. This is giving the star an oblate shape with an equatorial bulge that is 12% larger than the polar radius. It is radiating 56 times the Sun's luminosity from its photosphere at an effective temperature of .

References

References

  1. "14 Com".
  2. {{Cite Gaia DR3. 4009103588563247104
  3. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal.
  4. (2022). "Rapidly oscillating TESS A-F main-sequence stars: Are the roAp stars a distinct class?". Monthly Notices of the Royal Astronomical Society.
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f-type-subgiants shell-stars ap-stars coma-berenices durchmusterung-objects flamsteed-objects henry-draper-catalogue-objects hipparcos-objects bright-star-catalogue-objects
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