Results 41 to 50 of about 96,398 (314)

A Radial Velocity Survey of the Cygnus OB2 Association [PDF]

, 2006
We conducted a radial velocity survey of the Cygnus OB2 Association over a 6 year (1999 - 2005) time interval to search for massive close binaries. During this time we obtained 1139 spectra on 146 OB stars to measure mean systemic radial velocities and ...
Andy J. Monson, B. Uzpen, Blaauw A., Blaauw A., Christopher L. Fryer, Comeron F., Daniel C. Kiminki, Dequennoy A., Hall D. S., Henry A. Kobulnicky, Jennifer S. Irwin, K. Kinemuchi, Kazarovets E. V., Knodlseder J., Leitherer C., Lennon D. J., Maeder A., Michael J. Pierce, Nations H. L., R. C. Berrington, Rios L. Y., Romano G., S. E. Woosley, Torres-Dodgen A. V., van der Woerd H., Vanbeveren D., Vanbeveren D., Voelcker K., Wegner W.   +28 more
core   +3 more sources

The Galactic O-Star Spectroscopic Survey (GOSSS). III. 142 additional O-type systems [PDF]

, 2016
This is the third installment of GOSSS, a massive spectroscopic survey of Galactic O stars, based on new homogeneous, high signal-to-noise ratio, R~2500 digital observations selected from the Galactic O-Star Catalog (GOSC).
Alfaro, E. J., Apellániz, J. Maíz, Arias, J. I., Barbá, R. H., Gamen, R. C., Herrero, A., Leão, J. R. S., Marco, A., Negueruela, I., Simón-Díaz, S., Sota, A., Walborn, N. R.   +11 more
core   +4 more sources

The Binarity of Early-type Stars from LAMOST medium-resolution Spectroscopic Survey [PDF]

, 2021
Massive binaries play significant roles in many fields. Identifying massive stars, particularly massive binaries, is of great importance. In this paper, by adopting the technique of measuring the equivalent widths of several spectral lines, we identified
Yanjun Guo, Jiao Li, Jian-ping Xiong, Jiangdan Li, Luqian Wang, H. Xiong, Fengfang Luo, Y. Hou, Chao Liu, Zhanwen Han, Xuefei Chen   +10 more
semanticscholar   +1 more source

Towards an Accurate Determination of Parameters for Very Massive Stars: the Eclipsing Binary LMC-SC1-105 [PDF]

, 2008
This paper presents a photometric and spectroscopic study of the bright blue eclipsing binary LMC-SC1-105, selected from the OGLE catalog as a candidate host of very massive stars (>=30Mo).
Alceste Z. Bonanos, Andersen, Bagnuolo, Bally, Bonanos, Bonanos, Bonanos, Bouret, Bromm, Claret, Derekas, Elmegreen, Faccioli, Fitzpatrick, Gies, González, Hadrava, Herrero, Hilditch, Howarth, Kelson, Krumholz, Lanz, Massey, Massey, Massey, Mayer, Maíz Apellániz, Mochnacki, Nelson, O'Connell, Oey, Pinsonneault, Prša, Ribas, Santolaya-Rey, Schaerer, Schaller, Schwarzenberg-Czerny, Simon, Soszynski, Stickland, Walborn, Zebrun   +43 more
core   +1 more source

The Orbital and Physical Properties of Five Southern Be+sdO Binary Systems

The Astronomical Journal, 2023
Close binary interactions may play a critical role in the formation of the rapidly rotating Be stars. Mass transfer can result in a mass gainer star spun up by the accretion of mass and angular momentum, while the mass donor is stripped of its envelope ...
Luqian Wang, Douglas R. Gies, Geraldine J. Peters, Zhanwen Han   +3 more
doaj   +1 more source

New spectroscopic binaries among nearby stars [PDF]

Astronomy & Astrophysics, 2003
In the course of surveying a large number of nearby ( ≈ 50 pc or less) stars for indicators of youth, we have discovered a number of hitherto unknown spectroscopic binaries. Here we present a list of these new binaries with pertinent data. Two of these (HD 143705 and HD 89959) have been observed six times each, and their respective radial velocity ...
J. H. M. M. Schmitt, Swetlana Hubrig, R. Wichmann   +2 more
openaire   +2 more sources

Early-type stars in the young open cluster NGC 2244 and in the Mon OB2 association I. The multiplicity of O-type stars [PDF]

, 2009
Aims. We present the results obtained from a long-term spectroscopic campaign devoted to the multiplicity of O-type stars in the young open cluster NGC2244 and in the Mon OB2 association. Methods.
Bisiacchi, Chen, Conti, Conti, Conti, Conti, Conti, Cruz-González, De Becker, De Becker, de Wit, E. Gosset, Feldmeier, Frost, Fullerton, G. Rauw, García, Garmany, Gies, González, Gosset, H. Sana, Heck, Hensberge, Hiltner, Huang, Johnson, Kharchenko, L. Mahy, Li, Linder, Lindroos, Liu, M. De Becker, Martins, Martins, Mason, Mason, Massey, Mathys, Mathys, Maíz-Apellániz, Morgan, Morgan, Munari, Ogura, P. Eenens, Penny, Petrie, Plaskett, Pérez, Rauw, Sana, Sana, Sana, Sanford, Simón-Díaz, Stickland, Tadross, Turner, Turner, Underhill, Walborn, Walborn, Walborn, Wang, Y. Nazé, Zagury, Zinnecker   +68 more
core   +2 more sources

Gamma Cas Stars as Be+White Dwarf Binary Systems

The Astrophysical Journal Letters, 2022
The origin of the bright and hard X-ray emission flux among the γ Cas subgroup of B-emission line (Be) stars may be caused by gas accretion onto an orbiting white dwarf (WD) companion.
Douglas R. Gies, Luqian Wang, Robert Klement   +2 more
doaj   +1 more source

Application of a new non-linear least squares velocity curve analysis technique for spectroscopic binary stars [PDF]

, 2008
Using measured radial velocity data of nine double lined spectroscopic binary systems NSV 223, AB And, V2082 Cyg, HS Her, V918 Her, BV Dra, BW Dra, V2357 Oph, and YZ Cas, we find corresponding orbital and spectroscopic elements via the method introduced ...
K. Karami, R. Mohebi, M. Soltanzadeh
semanticscholar   +1 more source

The New Version of the Binary Star Database (BDB)

Open Astronomy, 2012
The Binary star database contains data on about 100 000 stellar systems of multiplicity 2 to 22, taken from a large variety of published catalogues for all types of binary stars: visual, orbital, astrometric, interferometric, spectroscopic, photometric ...
Kaygorodov P., Debray B., Kolesnikov N., Kovaleva D., Malkov O.   +4 more
doaj   +1 more source