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38 Arietis

Star in the constellation Aries

Summary

Star in the constellation Aries

| r-i = | v-r = | b-v = +0.235 | u-b = +0.121

38 Arietis (abbreviated 38 Ari) is a variable star in the northern constellation of Aries. 38 Arietis is the Flamsteed designation. It was once designated 88 Ceti, forming part of the neighboring constellation of Cetus. With an apparent visual magnitude of about +5.2 it is bright enough to be viewed with the naked eye. The measured annual parallax shift of 27.52 mas is equivalent to a distance of approximately 119 ly from Earth.

Rober L. Millis discovered that 38 Arietis is a variable star, at Lowell Observatory, in October 1966. The discovery was announced in 1967. It was given its variable star designation, UV Arietis, in 1970.

The spectrum of this star matches a stellar classification of A7 III-IV, with the luminosity class of III-IV indicating it shows traits part way between the subgiant and giant star stages of its evolution. It is a Delta Scuti variable with a period of 0.0355 days (51 minutes) and a magnitude change of 0.040. This star is larger than the Sun, with more than double the Sun's radius and 11 times the luminosity. This energy is being radiated into outer space from the atmosphere at an effective temperature of 7,638 K, giving it the white-hued glow of an A-type star.

References

References

  1. {{cite constellation. 38 Arietis
  2. (June 1967). "Photoelectric Observations of Two New Short-Period Variables". Publications of the Astronomical Society of the Pacific.
  3. (October 1970). "57th Name-List of Variable Stars". Information Bulletin on Variable Stars.
  4. (January 1974). "Photometric observations of delta Scuti stars. II. HR 432, HR 515, HR 812". Astronomy & Astrophysics Supplement Series.
  5. van Leeuwen, F.. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics.
  6. (April 1969). "A study of the bright A stars. I. A catalogue of spectral classifications". Astronomical Journal.
  7. Wagman, M.. (August 1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy.
  8. (October 2002). "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i". Astronomy and Astrophysics.
  9. (1966). "A System of photometric standards". Publicaciones Universidad de Chile, Department de Astronomy.
  10. Wilson, R. E.. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute of Washington D.C..
  11. (June 2012). "Age Determination for 346 Nearby Stars in the Herschel DEBRIS Survey". The Astronomical Journal.
  12. (February 2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy and Astrophysics.
  13. (June 2000). "A revised catalogue of delta Sct stars". Astronomy and Astrophysics Supplement Series.
  14. (September 2002). "On the Period-Luminosity-Colour-Metallicity relation and the pulsational characteristics of lambda Bootis type stars". Astronomy and Astrophysics.
  15. "38 Ari".
  16. (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports.
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aries-(constellation) henry-draper-catalogue-objects hipparcos-objects delta-scuti-variables flamsteed-objects objects-with-variable-star-designations bright-star-catalogue-objects durchmusterung-objects
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