Results 51 to 60 of about 3,864 (175)

The population of hot subdwarf stars studied with Gaia II. The Gaia DR2 catalogue of hot subluminous stars

, 2018
Based on data from the ESA Gaia Data Release 2 (DR2) and several ground-based, multi-band photometry surveys we compiled an all-sky catalogue of $39\,800$ hot subluminous star candidates selected in Gaia DR2 by means of colour, absolute magnitude and ...
Fusillo, N. P. Gentile, Geier, S., Marsh, T. R., Raddi, R.   +3 more
core   +1 more source

The Potential of Multicolor Photometry for Pulsating Subdwarf B Stars

The Astrophysical Journal Supplement Series, 2005
Accepted for publication in The Astrophysical Journal Supplement ...
Randall, S. K., Fontaine, G., Brassard, P., Bergeron, P.   +3 more
openaire   +2 more sources

A search for pulsating blue stars in the vicinity of NGC 6791 using Kepler LC data

EPJ Web of Conferences, 2015
There are 18 known pulsating subdwarf B stars in the field of view of the Kepler spacecraft during phase one. The majority of them were observed in the short cadence mode and have been successfully investigated via asteroseismic methods.
Sowicka Paulina, Bachulski Szymon, Baran Andrzej   +2 more
doaj   +1 more source

NLTE wind models of hot subdwarf stars

, 2010
We calculate NLTE models of stellar winds of hot compact stars (central stars of planetary nebulae and subdwarf stars). The studied range of subdwarf parameters is selected to cover a large part of these stars.
A. Feldmeier, A.W.A. Pauldrach, D.G. Hummer, D.H. Cohen, G. Fontaine, G. Gräfener, G. Meynet, J. Krtička, J. Krtička, J. Krtička, J. Krtička, J. Krtička, J. Krtička, J. Puls, J. Puls, J.S. Vink, J.S. Vink, J.S. Vink, Jiří Krtička, Jiří Kubát, K. Omukai, K. Unglaub, M.J. Seaton, P.A. Crowther, S.P. Owocki, S.P. Owocki, T. Lanz, V. Votruba, Ç. Püsküllü   +28 more
core   +1 more source

The population of hot subdwarf stars studied with Gaia I. The catalogue of known hot subdwarf stars [PDF]

, 2016
In preparation for the upcoming all-sky data releases of the Gaia mission we compiled a catalogue of known hot subdwarf stars and candidates drawn from the literature and yet unpublished databases.
Fusillo, N. P. Gentile, Geier, S., Green, E. M., Gänsicke, B. T., Nemeth, P., Schaffenroth, J., Telting, J. H., Østensen, R. H.   +7 more
core   +3 more sources

The detection of binary companions to subdwarf B stars [PDF]

Monthly Notices of the Royal Astronomical Society, 1998
Intermediate dispersion spectroscopy of a sample of 40 hot subdwarf B stars between 5500 and 9000A has been obtained. The sample includes a large fraction of targets which have been studied photometrically. Seven targets show strong lines arising from the infrared Ca ii triplet, the unequivocal signature of a cool companion.
C. S. Jeffery, D. L. Pollacco
openaire   +1 more source

The Unseen Population of F to K-type Companions to Hot Subdwarf Stars

, 2012
We present a method to select hot subdwarf stars with A to M-type companions using photometric selection criteria. We cover a wide range in wavelength by combining GALEX ultraviolet data, optical photometry from the SDSS and the Carlsberg Meridian ...
Abazajian, Allard, Aungwerojwit, Aznar Cuadrado, Aznar Cuadrado, B. T. Gänsicke, Ballouz, Bertone, Blanchette, Brown, Budavári, C. M. Copperwheat, Carpenter, Castellani, Castelli, Clausen, Copperwheat, D'Cruz, D. Steeghs, de Jong, Dobrzycka, Dorman, Dye, E. Breedt, Edelmann, Fekel, Ferguson, Fitzpatrick, Friedrich, Geier, Geier, Girardi, Girven, Green, Green, Green, Gänsicke, Han, Heber, Heber, Heber, Heber, Heber, Heber, Howarth, Humason, Iben, J. Girven, Jeffery, Jurić, Kilkenny, Koester, Li, Lisker, Marsh, Martin, Maxted, Maxted, Mengel, Michaud, Moni Bidin, Morales-Rueda, Morrissey, Napiwotzki, Napiwotzki, O'Toole, P. Longa-Peña, Papoular, Penning, Pickles, Politano, Rebassa-Mansergas, Reed, Ringwald, Ritter, S. Pyrzas, Saffer, Saffer, Saio, Schlegel, Skrutskie, Stark, Stark, Stroeer, Szkody, Szkody, T. R. Marsh, Thejll, Tillich, Tutukov, U. Heber, Ulla, Vennes, Viton, Wade, Wade, Webbink, Williams, Østensen   +98 more
core   +1 more source

Atmospheric parameters of field subdwarf B stars

The Astrophysical Journal, 1994
High signal-to-noise ratio optical spectrophotometry of a sample of field subluminous B stars drawn largely from the Palomar Green ultraviolet-excess survey is analyzed with a new grid of model atmospheres and synthetic spectra. The stellar effective temperatures, surface gravities, and photospheric helium abundances are determined simultaneously from ...
Rex A. Saffer, P. Bergeron, D. Koester, James Liebert   +3 more
openaire   +1 more source

X-rays from Hot Subdwarfs [PDF]

, 2015
Thanks to the high sensitivity of the instruments on board the XMM-Newton and Chandra satellites, it has become possible to explore the properties of the X-ray emission from hot subdwarfs.
La Palombara, Nicola, Mereghetti, Sandro
core   +3 more sources

Primeval very low-mass stars and brown dwarfs - VI. Population properties of metal-poor degenerate brown dwarfs [PDF]

, 2019
© 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.We presented 15 new T dwarfs that were selected from UKIRT Infrared Deep Sky Survey, Visible and Infrared Survey Telescope for Astronomy, and Wide ...
Allard, F., Burgasser, A. J., Galvez-Ortiz, M. C., Lodieu, N., Osorio, M. R. Zapatero, Pinfield, D. J., Zhang, Z. H.   +6 more
core   +5 more sources