Results 41 to 50 of about 43,328 (216)

Mining Double-line Spectroscopic Candidates in the LAMOST Medium-resolution Spectroscopic Survey Using a Human–AI Hybrid Method

The Astrophysical Journal Supplement Series
We utilize a hybrid approach that integrates the traditional cross-correlation function (CCF) and machine learning to detect spectroscopic multiple star systems, specifically focusing on double-line spectroscopic binaries (SB2s).
Shan-shan Li, Chun-qian Li, Chang-hua Li, Dong-wei Fan, Yun-fei Xu, Lin-ying Mi, Chen-zhou Cui, Jian-rong Shi   +7 more
doaj   +1 more source

A Spectroscopic Study of Field and Runaway OB Stars

, 2006
Identifying binaries among runaway O- and B-type stars offers valuable insight into the evolution of open clusters and close binary stars. Here we present a spectroscopic investigation of 12 known or suspected binaries among field and runaway OB stars ...
Allen C., Aslanov A. A., Aslanov A. A., Beardsley W. R., Blaauw A., Douglas R. Gies, Erika D. Grundstrom, Keenan F. P., M. Virginia McSwain, Mayer P., Moffat A. F. J., Plaskett J. S., Poveda A., Schaller G., Stickland D. J., Tabetha S. Boyajian, Voges W., Wesselius P. R., Zejnalov S. K.   +18 more
core   +1 more source

Catalogue of Bright IDS Stars with Extensive Cross-Identifications

Open Astronomy, 2014
A new catalogue of bright binary stars is presented. The catalogue1 includes bright IDS systems and bright spectroscopic binaries. Besides IDS data (coordinates, relative positions, magnitudes and spectral classification), the catalogue contains ...
Lipaeva N. A., Sementsov V. N., Malkov O. Yu.   +2 more
doaj   +1 more source

The Poincaré Pear and Poincaré-Darwin Fission Theory in Astrophysics, 1885-1901

Philosophia Scientiæ, 2023
In the early 1880s, Henri Poincaré discovered an equilibrium figure for uniformly-rotating fluid masses—the pear, or piriform figure—and speculated that in certain circumstances the pear splits into two unequal parts, and provides thereby a model for the
Scott A. Walter
doaj   +1 more source

Lithium abundances in CEMP stars

, 2012
Carbon-enhanced metal-poor (CEMP) stars are believed to show the chemical imprints of more massive stars (M > 0.8 Msun) that are now extinct. In particular, it is expected that the observed abundance of Li should deviate in these stars from the standard ...
Abia, Alvarez, Amanda Karakas, Aoki, Aoki, Aoki, Aoki, Aoki, Aoki, Aoki, Asplund, Asplund, Bertrand Plez, Christlieb, Cohen, Cristallo, Denissenkov, Denissenkov, Eggleton, Frebel, Goriely, Herwig, Hobbs, Iwamoto, Jennifer A. Johnson, Johnson, Johnson, Karakas, Lawler, Lucatello, Lucatello, Lucatello, Lucatello, Lucatello, Masseron, Nollett, Norbert Christlieb, Norris, Norris, Norris, Norris, Palmerini, Preston, Richard, Roederer, Ryan, Ryan, Sara Lucatello, Siess, Sneden, Spite, Spite, Steffen, Suda, Suda, Thomas Masseron, Thompson, Thorburn, Timothy C. Beers, Tsangarides, VandenBerg   +60 more
core   +3 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

Old Dogs, New Tricks: Re-examining Photographic Spectra of Plaskett’s Star

The Astronomical Journal
Photographic spectra of Plaskett’s Star (HR 2420, HD 47129, V640 Monocerotis) that were recorded at the Dominion Astrophysical Observatory have been digitized with a flatbed scanner.
T. J. Davidge
doaj   +1 more source

Evidence of a Decreased Binary Fraction for Massive Stars within 20 milliparsecs of the Supermassive Black Hole at the Galactic Center

The Astrophysical Journal, 2023
We present the results of the first systematic search for spectroscopic binaries within the central 2 × 3 arcsec ^2 around the supermassive black hole at the center of the Milky Way galaxy.
Devin S. Chu, Tuan Do, Andrea Ghez, Abhimat K. Gautam, Anna Ciurlo, Kelly Kosmo O’neil, Matthew W. Hosek Jr., Aurélien Hees, Smadar Naoz, Shoko Sakai, Jessica R. Lu, Zhuo Chen, Rory O. Bentley, Eric E. Becklin, Keith Matthews   +14 more
doaj   +1 more source

The XO Planetary Survey Project - Astrophysical False Positives

, 2010
Searches for planetary transits find many astrophysical false positives as a by-product. There are four main types analyzed in the literature: a grazing-incidence eclipsing binary star, an eclipsing binary star with a small radius companion star, a blend
Beatty, Brown, Burke, Burke, Burke, Charbonneau, Christopher J. Burke, Creevey, Dommanget, Drilling, Garcia-Melendo, Hoyer, Jeff A. Valenti, Johns-Krull, Kenneth Janes, Kurucz, McCullough, McCullough, Minniti, Nidever, O’Donovan, Pavel Machalek, Peter R. McCullough, Radosaw Poleski, Skrutskie   +24 more
core   +1 more source

A High Angular Resolution Survey of Massive Stars in Cygnus OB2: Results from the Hubble Space Telescope Fine Guidance Sensors [PDF]

, 2013
We present results of a high angular resolution survey of massive OB stars in the Cygnus OB2 association that we conducted with the Fine Guidance Sensor 1R (FGS1r) on the Hubble Space Telescope.
Caballero-Nieves, Saida M., DeGioia-Eastwood, Katherine, Gies, Douglas R., Herrero, Artemio, Jao, Wei-Chun, Mason, Brian D., Massey, Philip, Moffat, Anthony F. J., Nelan, Edmund P., Walborn, Nolan R., Wallace, Debra J.   +10 more
core   +2 more sources