Latour M, Irrgang A, Heber U, Schaffenroth V (2015)
Publication Status: Published
Publication Type: Conference contribution
Publication year: 2015
Publisher: ASTRONOMICAL SOC PACIFIC, 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
Book Volume: 493
Pages Range: 9-14
HD188112 is an extremely low mass white dwarf in a close binary system. According to a previous study, the mass of HD188112 is similar to 0.24 M-circle dot and a lower limit of 0.73 M-circle dot could be put for the mass of its unseen companion, a compact degenarate object. We used HST STIS spectra to measure the rotational broadening of UV metallic lines in HD188112, in order to put tighter constraints on the mass of its companion. By assuming that the system in is synchronous rotation, we derive a companion mass between 1.05 and 1.25 M-circle dot. We also measure abundances for magnesium, silicon, and iron, respectively log N(X)/N(H) = -6.40, -7.25, and -5.81. The radial velocities measured from the UV spectra are found to be in very good agreement with the prediction based on the orbital parameters derived in the previous study made a decade ago.
APA:
Latour, M., Irrgang, A., Heber, U., & Schaffenroth, V. (2015). HD188112: Supernova Ia Progenitor? (pp. 9-14). ASTRONOMICAL SOC PACIFIC, 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA.
MLA:
Latour, Marilyn, et al. "HD188112: Supernova Ia Progenitor?" ASTRONOMICAL SOC PACIFIC, 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA, 2015. 9-14.
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