Astronomy:RV Andromedae

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Short description: Star in the constellation Andromeda
RV Andromedae
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The visual band light curve of RV Andromedae, plotted from ASAS-SN data[1]
Observation data
Equinox J2000.0]] (ICRS)
Constellation Andromeda
Right ascension  02h 11m 02.56581s[2]
Declination 48° 56′ 45.0634″[2]
Apparent magnitude (V) 9.0–11.5[3]
Characteristics
Spectral type M4e[3]
B−V color index 1.607[4]
Variable type Semi-regular[3]
Astrometry
Radial velocity (Rv)−10.0±2.0[5] km/s
Proper motion (μ) RA: 10.456(48)[2] mas/yr
Dec.: −0.958(56)[2] mas/yr
Parallax (π)1.0950 ± 0.0483[2] mas
Distance3,000 ± 100 ly
(910 ± 40 pc)
Other designations
BD+48 616, HIP 10192[5]
Database references
SIMBADdata

RV Andromedae is a variable star in the constellation of Andromeda. It is classified as a semiregular variable pulsating giant star, and varies from an apparent visual magnitude of 11.5 at minimum brightness to a magnitude of 9.0 at maximum brightness, with a period of approximately 168.9 days.[3]

In 1904, English amateur astronomer Arthur Stanley Williams examined photographic plates taken during the previous two years and determined that RV Andromedae was a variable star whose period he estimated to be 182 days.[6] In 1907, Annie Jump Cannon listed it with its variable star designation in her Second Catalogue of Variable Stars.[7]

This is one of the Mira variables where mode switching of pulsations have been observed; amplitude and periods have been seen decreasing and subsequently increasing back to values near the previous ones.[8]

References

  1. ↑ "ASAS-SN Variable Stars Database". ASAS-SN. https://asas-sn.osu.edu/variables/lookup. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 3.2 3.3 RV And, database entry, Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.), N. N. Samus, O. V. Durlevich, et al., CDS ID II/250 Accessed on line 2009-06-30.
  4. ↑ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy & Astrophysics 355: L27–L30, Bibcode: 2000A&A...355L..27H. 
  5. ↑ 5.0 5.1 "RV And". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=RV+And. 
  6. ↑ Williams, A. Stanley (April 1904). "New variable star 17.1904 Andromedae". Astronomische Nachrichten 165 (8): 125. doi:10.1002/asna.19041650806. Bibcode: 1904AN....165..125W. https://articles.adsabs.harvard.edu/pdf/1904AN....165..125W. Retrieved 2 November 2024. 
  7. ↑ Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory 55: 1–94. Bibcode: 1907AnHar..55....1C. https://articles.adsabs.harvard.edu/pdf/1907AnHar..55....1C. Retrieved 2 November 2024. 
  8. ↑ Cadmus, R. R. Jr. et al. (1991), "Observation of Possible Mode Switching in Three Semiregular Variable Stars", Astronomical Journal 101: 1043, doi:10.1086/115746, Bibcode: 1991AJ....101.1043C. 



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