Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Rex A. Saffer"'
Publikováno v:
The Astrophysical Journal. 672:540-552
We present a comprehensive analysis of the far-ultraviolet spectra offive DB white dwarfs spanning the effective temperature range between 14,700 and 20,800 K. The FUSE line analysis shows that carbon features, previously observed in several hot DB s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97416716a944456fc3acd93b728d7b74
https://doi.org/10.1086/523699
https://doi.org/10.1086/523699
Autor:
John A. Ouellette, Rex A. Saffer, Thierry Lanz, Michael M. Shara, David R. Zurek, J. F. Sepinsky, Orsola De Marco
Publikováno v:
The Astrophysical Journal. 632:894-919
We present a spectroscopic analysis of HST/STIS and FOS low- and intermediate-resolution spectroscopy of 55 stars (turn-off stars, horizontal branch stars and blue stragglers) in four globular clusters (47 Tucanae, M3, NGC6752, and NGC6397). Stars we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d3f03e7a7c4d49412b4ba17abeb09688
https://doi.org/10.1086/444372
https://doi.org/10.1086/444372
Autor:
Francis P. Keenan, Jonathan Smoker, Rex A. Saffer, W. R. J. Rolleston, B.B. Lynn, Philip Dufton
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 349:821-832
High-resolution (R 40 000) echelle spectroscopic observations of 13 high-latitude early-type stars are presented. These stars comprise the final part of a complete magnitude range limited sample based on low-resolution spectroscopy of targets drawn f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50f9013dff8edafafa27c647aa496c41
https://doi.org/10.1111/j.1365-2966.2004.07493.x
https://doi.org/10.1111/j.1365-2966.2004.07493.x
Autor:
M. Billères, James Liebert, Stéphane Charpinet, Pierre Brassard, Rex A. Saffer, Gilles Fontaine
Publikováno v:
The Astrophysical Journal. 563:1013-1030
We report the discovery of low-amplitude, short-period, multiperiodic luminosity variations in the hot B subdwarf PG 0014+067. This star was selected as a potential target in the course of our ongoing survey to search for pulsators of the EC 14026 ty
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24557e530b9f07a3eb00c2df2508443f
https://doi.org/10.1086/323959
https://doi.org/10.1086/323959
Publikováno v:
Publications of the Astronomical Society of the Pacific. 113:937-943
We have obtained the optical spectrum (3750-7500 A u ) and ultraviolet fluxes at 1521 and 2260 A u for the quasar candidate UITBOC 1574. The optical spectrum shows strong Balmer absorption lines through at least and the He ii line at 4686 A u . We co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d533fdb5410f5e928e164230b147225
https://doi.org/10.1086/322915
https://doi.org/10.1086/322915
Autor:
Jay B. Holberg, R. S. Stobie, Rex A. Saffer, Edward M. Sion, Darragh O'Donoghue, D. Stys, D. Kilkenny, Chris Koen, R. Slevinsky
Publikováno v:
Publications of the Astronomical Society of the Pacific. 112:354-358
We report the discovery of a peculiar new hot high-gravity predegenerate star, EC 11481–2303 from the Edinburgh-Cape Blue Object Survey, based upon the analysis of far-UV International Ultraviolet Explorer (IUE) echelle and low-resolution spectra a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a2e21ae1e7c2eedb861aa1f60778050
https://doi.org/10.1086/316525
https://doi.org/10.1086/316525
Autor:
Rex A. Saffer, Pierre Brassard, M. Billères, Stéphane Charpinet, Gilles Fontaine, James Liebert
Publikováno v:
The Astrophysical Journal. 530:441-453
We report the discovery of multiperiodic luminosity variations in the hot B subdwarf KPD 1930+2752. This star was selected as a potential target in the course of our ongoing survey to search for pulsators of the EC 14026 type. Our model atmosphere an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff4a614479cf254253fff626f5666be8
https://doi.org/10.1086/308369
https://doi.org/10.1086/308369
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 306:213-222
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::214a9120cf87ed8c0b6c51c14eb85583
https://doi.org/10.1046/j.1365-8711.1999.02506.x
https://doi.org/10.1046/j.1365-8711.1999.02506.x
Publikováno v:
The Astrophysical Journal. 517:399-415
We present new determinations of effective temperature, surface gravity, and masses for a sample of 46 hot DA white dwarfs selected from the EUVE and ROSAT Wide Field Camera bright source lists in the course of a near-IR survey for low mass companion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79eb39d113eb51b576374b775e5178fa
https://doi.org/10.1086/307170
https://doi.org/10.1086/307170
Autor:
P. Bergeron, F. Wesemael, Rex A. Saffer, Gilles Fontaine, A. Beauchamp, Pierre Brassard, J. W. Liebert
Publikováno v:
The Astrophysical Journal. 516:887-891
We have secured optical spectra for the eight currently known variable DB, or V777 Her, stars. With the help of a new generation of synthetic spectra, spectroscopic effective temperatures are derived for these objects, as well as for 15 other DB or D
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d399775eadf2736e1c9ed234289767cb
https://doi.org/10.1086/307148
https://doi.org/10.1086/307148