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40 Arietis

Binary star in the constellation Aries

Summary

Binary star in the constellation Aries

| r-i = 0.44 | v-r = | b-v = +1.20 | u-b = 1.13

40 Arietis is a probable binary star system in the northern constellation of Aries. 40 Arietis is the Flamsteed designation. Their combined apparent magnitude is 5.82, putting the system near the limit of naked eye visibility. Based upon an annual parallax shift of just , it is 445 ly away from the Sun. At that distance, its brightness is diminished by 0.21 in magnitude from extinction caused by interstellar gas and dust.

This is a suspected spectroscopic binary with an angular separation of between the two components. The visible component is an evolved giant star with a stellar classification of K1 III. It is a suspected variable star of unknown type, and is around 2.6 billion years old with 1.6 times the mass of the Sun. With the supply of hydrogen at its core exhausted, the star has expanded to 20 times the Sun's radius. It is radiating 128 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,473 K.

References

| display-authors=1 | last1=Feuillet | first1=Diane K.

| display-authors=1 | last1=Samus | first1=N. N.

References

  1. {{cite DR2. 83740218616410624
  2. Wilson, Ralph Elmer. (1953). "General Catalogue of Stellar Radial Velocities". [[Carnegie Institution of Washington]].
  3. (1978). "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System". Astronomy and Astrophysics Supplement Series.
  4. (September 2008). "A catalogue of multiplicity among bright stellar systems". [[Monthly Notices of the Royal Astronomical Society]].
  5. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics.
  6. "40 Ari".
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k-type-giants spectroscopic-binaries suspected-variables aries-(constellation) durchmusterung-objects flamsteed-objects henry-draper-catalogue-objects hipparcos-objects bright-star-catalogue-objects
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