THE HOT R CORONAE BOREALIS STAR DY CENTAURI IS A BINARY

Journal Article · Tue Nov 20 00:00:00 EST 2012 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/760/1/L3· OSTI ID:22078436

Kameswara Rao, N ^[1]; Lambert, David L; McArthur, Barbara ^[2]; Garcia-Hernandez, D A ^[3]; Simon Jeffery, C ^[4]

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1. 543, 17th Main, IV Sector, HSR Layout, Bangalore 560102 (India)
2. W. J. McDonald Observatory, University of Texas, Austin, TX 78712-1083 (United States)
3. Instituto de Astrofisica de Canarias, C/Via Lactea s/n, E-38205 La Laguna (Spain)
4. Armagh Observatory, College Hill, Armagh BT61 9DG (United Kingdom)

The remarkable hot R Coronae Borealis (RCB) star DY Cen is revealed to be the first and only binary system to be found among the RCB stars and their likely relatives, including the extreme helium stars and the hydrogen-deficient carbon stars. Radial velocity determinations from 1982 to 2010 have shown that DY Cen is a single-lined spectroscopic binary in an eccentric orbit with a period of 39.67 days. It is also one of the hottest and most H-rich member of the class of RCB stars. The system may have evolved from a common envelope to its current form.

• OSTI ID: 22078436
• Journal Information: Astrophysical Journal Letters, Vol. 760, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BINARY STARS
CARBON STARS
HELIUM
HYDROGEN
ORBITS
RADIAL VELOCITY
STAR EVOLUTION