Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21714402r&link_type=abstract
American Astronomical Society, AAS Meeting #217, #144.02; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
The eclipsing binary system DN UMa (HD 103483) is a likely triple system with a possible pulsating component that has been studied extensively. The period of 1.7-d has been determined by Gimenez and Queseda (1982). Wilson (1953) reported a systemic radial velocity of -8 km/s, based on a limited data-set. To investigate this interesting object further, we initiated a photometric campaign in April 2009 on the Automatic Photoelectric Telescope in Patagonia, AZ. In January 2010 we followed up DN UMa spectroscopically at the 2.1 m telescope at Kitt Peak National Observatory. The high-resolution echelle spectra have been processed in IRAF. The exposures have been cleaned of cosmic rays, and the extracted spectra have been wavelength-calibrated and flux-normalized. In conjunction with photometry, the spectroscopic data were used to determine fundamental parameters (radii, masses, and temperatures) of the binary star components. We present the results of the modeling based on archival and newly acquired data.
Engle Scott
Kirk Brian
Prsa Andrej
Robertson Jordan
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