Results 21 to 30 of about 81,865 (295)

The triple degenerate star WD1704+481 [PDF]

, 2000
WD1704+481 is a visual binary in which both components are white dwarfs. We present spectra of the H-alpha line of both stars which show that one component (WD1704+481.2 = Sanduleak B = GR 577) is a close binary with two white dwarf components.
Han, Z., Marsh, T. R., Maxted, P. F. L., Moran, C. K. J.   +3 more
core   +4 more sources

Binary star astrometry with milli and sub-milli arcsecond precision [PDF]

Serbian Astronomical Journal, 2014
The past several decades have seen accelerating progress in improving binary stars fundamental parameters determinations, as new observational techniques have produced visual orbits of many spectroscopic binaries with a milli arcsecond precision.
Jankov S., Cvetković Z., Pavlović R.
doaj   +1 more source

The High Angular Resolution Multiplicity of Massive Stars

, 2008
We present the results of a speckle interferometric survey of Galactic massive stars that complements and expands upon a similar survey made over a decade ago.
Alzner, Alzner, Alzner, Baize, Baize, Baize, Baize, Barnaby, Brendley, Brendley, Brian D. Mason, Clarke, Couteau, Couteau, Couteau, Cvetkovic, Cvetkovic, Docobo, Docobo, Docobo, Docobo, Docobo, Docobo, Docobo, Docobo, Docobo, Docobo, Docobo, Docobo, Docobo, Docobo, Docobo, Docobo, Douglas R. Gies, ESA, Espin, Fekel, Finsen, Finsen, Finsen, Finsen, Finsen, Finsen, Finsen, Finsen, Forveille, Gies, Hartkopf, Hartkopf, Hartkopf, Hartkopf, Hartkopf, Hartkopf, Hartkopf, Hartkopf, Hartkopf, Hartkopf, Hartkopf, Harvey, Harvin, Heintz, Heintz, Heintz, Heintz, Heintz, Heintz, Heintz, Heintz, Holden, Honig, Hoogerwerf, Horch, Hummel, Hummel, Isobe, Isobe, John W. Helsel, Lane, Leonard, Ling, Ling, Ling, Ling, Mante, Mante, Mante, Mante, Mante, Mante, Mante, Mason, Mason, Mason, Mason, Mason, Mason, Mason, Mason, Maíz-Apellániz, Maíz-Apellániz, Mourao, Muller, Nelan, Niemela, Nys, Olevic, Olevic, Olevic, Olevic, Olevic, Olevic, Olevic, Patience, Penny, Petr, Popovic, Romero, Romero, Romero, Romero, Rossiter, Scardia, Scardia, Scardia, Seymour, Seymour, Seymour, Seymour, Seymour, Simon, Starikova, Starikova, Starikova, Söderhjelm, Tamazian, Todd J. Henry, Tokovinin, Tokovinin, Turner, Turner, van den Bos, Vanbeveren, Walborn, Weigelt, William I. Hartkopf, Zaera, Zirm, Zirm, Zulevic, Zulevic, Öpik   +150 more
core   +1 more source

Accurate M Dwarf Metallicities from Spectral Synthesis: A Critical Test of Model Atmospheres [PDF]

, 2006
We describe a method for accurately determining M dwarf metallicities with spectral synthesis based on abundance analyses of visual binary stars. We obtained high resolution, high signal-to-noise spectra of each component of five visual binary pairs at ...
Bean, Jacob L., Benedict, G. Fritz, Hauschildt, Peter H., Johns-Krull, Christopher M., Sneden, Christopher   +4 more
core   +2 more sources

The Census of Exoplanets in Visual Binaries: Population Trends from a Volume-Limited Gaia DR2 and Literature Search

Frontiers in Astronomy and Space Sciences, 2021
We present results from an extensive search in the literature and Gaia DR2 for visual co-moving binary companions to stars hosting exoplanets and brown dwarfs within 200 pc.
Clémence Fontanive, Daniella Bardalez Gagliuffi   +1 more
doaj   +1 more source

Multiplicity of late-type B stars with HgMn peculiarity

, 2010
Observations at various wavelengths of late B-type stars exhibiting strong overabundances of the chemical elements Hg and Mn in their atmospheres indicate that these stars are frequently found in binary and multiple systems.
Abt, Abt, Adelman, Aikman, Alzner, Andrade, Behar, Berghöfer, Brandner, Briquet, Castelli, Chochol, Cole, Correia, Dolk, Duchêne, Dworetsky, Gahm, González, González, Guthrie, Guthrie, Hartkopf, Hartkopf, Hubrig, Hubrig, Hubrig, Hubrig, Hutchings, Isobe, Kochukhov, Kouwenhoven, Lenzen, Levato, Lindroos, Lindroos, M. Schöller, Masciadri, Mason, Mason, Mason, Mason, McAlister, N. Ageorges, Nordstrom, Novakovic, Olevic, Oudmaijer, Pourbaix, Renson, Roberts, Roberts, Rousset, S. Correia, S. Hubrig, Scarfe, Schneider, Stickland, Tokovinin, Wahlgren, Wolff, Zentelis   +61 more
core   +1 more source

Dynamical detection of three triple stellar systems in open clusters [PDF]

, 2014
We present a kinematic analysis of three triple stellar systems belonging to two open clusters: CPD-60{\deg}961 and HD66137 in NGC2516, and HD315031 in NGC6530.
Cowley, C. R., Gonzalez, J. F., Veramendi, M. E.   +2 more
core   +3 more sources

The primordial binary population II: Recovering the binary population for intermediate mass stars in Sco OB2

, 2007
We characterize the binary population in the young and nearby OB association Scorpius OB2 using available observations of visual, spectroscopic, and astrometric binaries with intermediate-mass primaries.
A. G. A. Brown, Alencar, Andersen, Bahcall, Balega, Barbier-Brossat, Basri, Bate, Bertiau, Blaauw, Blaauw, Bouy, Brown, Brown, Buscombe, Chabrier, Chanamé, Chen, Close, Correia, Cruzalebes, de Bruijne, de Geus, de Zeeuw, Duflot, Duquennoy, Eggleton, Evans, Fryer, Fryer, Girardi, Gualandris, Hanson, Hartkopf, Heacox, Heacox, Heggie, Hillebrandt, Hills, Hoogerwerf, Hut, Jilinski, Jordi, Kouwenhoven, Kouwenhoven, Kraicheva, Kraus, Kraus, Kroupa, Kroupa, Kroupa, Kroupa, Kurosawa, L. Kaper, Levato, Lindegren, Lindroos, M. B. N. Kouwenhoven, Malkov, Mamajek, Mason, Mason, Mathieu, Mathis, McAlister, Meibom, Meynet, Miura, Oblak, Palla, Perryman, Perryman, Plummer, Portegies Zwart, Portegies Zwart, Preibisch, Preibisch, Preibisch, Robin, S. F. Portegies Zwart, Shatsky, Slesnick, Slettebak, Sowell, Svechnikov, Söderhjelm, Thackeray, Tokovinin, Tokovinin, van Albada, van den Heuvel, Vereshchagin, Verschueren, Worley, Worley, Yungelson   +95 more
core   +1 more source

Carina OB Stars: X-ray Signatures of Wind Shocks and Magnetic Fields [PDF]

, 2011
The Chandra Carina Complex contains 200 known O- and B type stars. The Chandra survey detected 68 of the 70 O stars and 61 of 127 known B0-B3 stars. We have assembled a publicly available optical/X-ray database to identify OB stars that depart from the ...
Anthony F. J. Moffat, Antokhin, Babel, Benaglia, Berghoefer, Bessell, Broos, Cassinelli, Cassinelli, Castelli, Cohen, Cohen, Cohen, Corcoran, Daniel, David H. Cohen, de Jager, DeGioia-Eastwood, Evans, Evans, Feigelson, Feldmeier, Forte, Freyhammer, Gagne, Gagné, Gamen, Garrett Fehon, Gayley, Getman, Hamaguchi, Hillier, Hoffmeister, Ignace, Leisa K. Townsley, Leutenegger, Lida M. Oskinova, Lépine, Lépine, Maiz Apellaniz, Marc Gagné, Massey, Matthew S. Povich, Maíz Apellániz, Mermilliod, Michael F. Corcoran, Michael R. Savoy, Miroshnichenko, Moffat, Mullan, Nancy Remage Evans, Nelan, Nelan, Nolan R. Walborn, Owocki, Patience, Patrick S. Broos, Pollock, Puls, Rauw, Reed, Robitaille, Robitaille, Sanchawala, Schulz, Skiff, Skinner, Skinner, Smith, Smith, Sota, Stelzer, Turner, ud-Doula, Vazquez, Walborn, Walborn, Walborn, Walborn, Walborn, Waldron, Wegner, Wojdowski, Wolk, Wright, Yaël Nazé, Zinnecker   +86 more
core   +4 more sources

Spectroscopic Orbits of Subsystems in Multiple Stars. XI

The Astronomical Journal
Adding to the large radial velocity survey of nearby solar-type stars (summary in Tokovinin, 2023a), spectroscopic orbits are determined for four hierarchical systems: HIP 49442 (inner and outer periods of 164.55 days and 34 yr, respectively), HIP 55691 (
Andrei Tokovinin
doaj   +1 more source