Surf Wiki
Save to docs
science/astronomy

From Surf Wiki (app.surf) — the open knowledge base

15 Arietis

Single, variable star in the constellation Aries

Summary

Single, variable star in the constellation Aries

| r-i = | v-r = | b-v = +1.64 | u-b = +1.91

15 Arietis (abbreviated 15 Ari) is a single variable star in the northern constellation of Aries. 15 Arietis is the Flamsteed designation; it also bears the variable star designation AV Arietis. It has an apparent visual magnitude of 5.74, which is just bright enough to be visible to the naked eye from dark suburban skies. An annual parallax shift of 5.84 mas corresponds to a physical distance of approximately 560 ly from Earth. At that distance, the star's brightness is reduced by 0.33 in magnitude because of extinction from interstellar gas and dust.

This is a red giant star with a stellar classification of M3 III. The measured angular diameter of this star is 3.67 ± 0.11 mas. At its estimated distance, this yields a physical size of about 67 times the radius of the Sun. The radius determined from the observed brightness and colour of the star is .

15 Arietis is a short period semiregular variable with the designation AV Arietis. The period given in the General Catalogue of Variable Stars is 5.032 days. Longterm photometry finds that the strongest pulsation period is 18.1 days with an amplitude of 0.028 magnitudes, while a second is 21.9 days and 0.030 in magnitude.

References

. The radius (R*) is given by: :\begin{align} 2\cdot R_* & = \frac{(170\cdot 3.67\cdot 10^{-3})\ \text{AU}}{0.0046491\ \text{AU}/R_{\bigodot}} \ & \approx 134\cdot R_{\bigodot} \end{align}

References

  1. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society.
  2. van Leeuwen, F.. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics.
  3. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics.
  4. (December 2009). "Long-term photometry and periods for 261 nearby pulsating M giants". [[Monthly Notices of the Royal Astronomical Society]].
  5. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society.
  6. (February 2005). "CHARM2: An updated Catalog of High Angular Resolution Measurements". Astronomy and Astrophysics.
  7. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data.
  8. (1992). "Asymptotic Giant Branch Stars Near the Sun". The Astronomical Journal.
  9. (2000). "Rapidly oscillating M giant stars?". Monthly Notices of the Royal Astronomical Society.
  10. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S.
Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

henry-draper-catalogue-objects hipparcos-objects flamsteed-objects aries-(constellation) m-type-giants objects-with-variable-star-designations bright-star-catalogue-objects short-period-semiregular-variable durchmusterung-objects asymptotic-giant-branch-stars
Want to explore this topic further?

Ask Mako anything about 15 Arietis — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report