Sneden's Star

Source: Wikipedia, the free encyclopedia.
Sneden's Star
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 17m 01.65585s[1]
Declination −16° 39′ 27.0519″[1]
Apparent magnitude (V) 13.21[2]
Characteristics
Spectral type KIIvw[3][failed verification]
B−V color index 0.78[3]
Distance
approx. 17,000 ly
(approx. 5,000 pc)
Absolute magnitude (MV)−0.23[4]
Details
Gyr
Other designations
BPS CS 22892-0052, HE 2214-1654[7]
Database references
SIMBADdata

BPS CS22892-0052 (Sneden's Star) is an old

Schmidt telescope at the Cerro Tololo Inter-American Observatory in Chile. Extended high-resolution spectroscopic observations since around 1995 (with Chris Sneden from the University of Texas at Austin as the leading observer) allowed observers to determine the abundances of 53 chemical elements
in this star, as of December 2005 only second in number to the Sun.

From barium (Z=56) on, all elements show the pattern of the r-process contribution to the abundances of the elements in the Solar System. Comparing the observed abundances for a

CS31082-001, BD+17°3248 and HE 1523-0901) from thorium-to-uranium
ratios.

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    S2CID 119249291
    . 136.
  3. ^
    S2CID 121307016
    .
  4. S2CID 121564385
    .
  5. ISSN 0004-6361
    .
  6. S2CID 166227927
    .
  7. ^ "BPS CS 22892-0052". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-03-29.

Sources

  • Beers T.C., Preston G.W., Shectman S.A., A search for stars of very low metal abundance. I., Astron. J., 90, 2089-2102 (1985)
  • Beers T.C., Preston G.W., Shectman S.A., A search for stars of very low metal abundance. II., Astron. J., 103, 1987-2034 (1992)
  • Kratz, Karl-Ludwig; Bitouzet, Jean-Philippe; Thielemann, Friedrich-Karl; Moeller, Peter; Pfeiffer, Bernd, Isotopic r-process abundances and nuclear structure far from stability - Implications for the r-process mechanism, Astrophysical Journal, vol. 403, no. 1, p. 216-238 (1993)
  • Sneden, Christopher; McWilliam, Andrew; Preston, George W.; Cowan, John J.; Burris, Debra L.; Armosky, Bradley J., The Ultra--Metal-poor, Neutron-Capture--rich Giant Star CS 22892-052, Astrophysical Journal v.467, p. 819 (1996)
  • Cowan, John J.; Pfeiffer, B.; Kratz, K.-L.; Thielemann, F.-K.; Sneden, Christopher; Burles, Scott; Tytler, David; Beers, Timothy C., R-Process Abundances and Chronometers in Metal-poor Stars The Astrophysical Journal, Volume 521, Issue 1, pp. 194–205 (1999)

External links

Retrieved from "https://en.wikipedia.org/w/index.php?title=Sneden%27s_Star&oldid=1227585017"