DM Lyrae (DM Lyr for short) is a dwarf nova in the constellation Lyra. This binary system is composed of a primary star of unknown type, and a white dwarf companion. It erupted in 1928 and 1996 and reached about magnitude 13.[1]

DM Lyrae

A visual band light curve for DM Lyrae, adapted from Nogami et al. (2003).[1] The inset plot shows the superhump variations.
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Lyra
Right ascension 18h 58m 44.43s[2]
Declination +30° 15′ 33.0″[2]
Apparent magnitude (V) +18 (quiet), +13.6 (burst)[2]
Characteristics
Spectral type ? / White dwarf
Variable type SU UMa[1]
Orbit[3]
Period (P)0.0654092±0.000002 d
Periastron epoch (T)2,451,343.8565±0.0015 HJD
Semi-amplitude (K1)
(primary)
37±5 km/s
Details
Donor star
Mass0.095±0.022[4] M
Radius0.145±0.011[4] R
Other designations
Lyr 1928, AN 250.1929, 1RXS J185845.1+301548, AAVSO 1854+30, DM Lyr[5]
Database references
SIMBADdata

See also

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References

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  1. ^ a b c Nogami, D.; et al. (2003). "The SU UMa Nature of the Dwarf Nova, DM Lyrae". Publications of the Astronomical Society of Japan. 55 (2): 483–488. arXiv:astro-ph/0301036. Bibcode:2003PASJ...55..483N. doi:10.1093/pasj/55.2.483. S2CID 18844865.
  2. ^ a b c Downes, Ronald A.; et al. (2001). "A Catalog and Atlas of Cataclysmic Variables: The Living Edition". Publications of the Astronomical Society of the Pacific. 113 (784): 764. arXiv:astro-ph/0102302. Bibcode:2001PASP..113..764D. doi:10.1086/320802. S2CID 16285959.
  3. ^ Thorstensen, John R.; Fenton, William H. (January 2003). "Five Dwarf Novae with Orbital Periods below Two Hours". The Publications of the Astronomical Society of the Pacific. 115 (803): 37–42. arXiv:astro-ph/0209172. Bibcode:2003PASP..115...37T. doi:10.1086/345103. S2CID 119343404.
  4. ^ a b Knigge, Christian (December 2006). "The donor stars of cataclysmic variables". Monthly Notices of the Royal Astronomical Society. 373 (2): 484–502. arXiv:astro-ph/0609671. Bibcode:2006MNRAS.373..484K. doi:10.1111/j.1365-2966.2006.11096.x. S2CID 2616606.
  5. ^ "DM Lyr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-11-15.
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