Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...394..603s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 394, no. 2, Aug. 1, 1992, p. 603-608. Research supported by Space Telescope
Astronomy and Astrophysics
Astrophysics
66
Stellar Magnetic Fields, Stellar Mass, White Dwarf Stars, Astronomical Polarimetry, Balmer Series, Line Spectra, Stellar Evolution, Stellar Parallax, Stellar Spectrophotometry, Stellar Temperature
Scientific paper
New CCD spectrophotometry and circular spectropolarimetry data are presented for white dwarfs PG 1658+441 and PG 0136+251. The data confirm a magnetic field of mean surface strength Bs = 2.3 +/-0.2 MG for the former star but provide only marginal evidence for a much weaker longitudinal component of Be = -75 +/-35 kG (1 sigma) for the latter object. By adopting straightforward approximations for the magnetic object, the lines are successfully fitted with synthetic spectra from stellar atmosphere models, allowing the T(eff) and surface gravity of each star to be determined. It is found that the enhanced Balmer lines of both stars can be attributed to unusually large surface gravities and therefore high mass (greater than 1.2 solar mass). The implications of the results are discussed.
Bergeron Pierre
Liebert James
Saffer Rex A.
Schmidt Gary D.
No associations
LandOfFree
Two ultramassive white dwarfs found among candidates for magnetic fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Two ultramassive white dwarfs found among candidates for magnetic fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two ultramassive white dwarfs found among candidates for magnetic fields will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1165682