Results 21 to 30 of about 84,288 (244)

Resonant Oscillations and Tidal Heating in Coalescing Binary Neutron Stars [PDF]

, 1994
Tidal interaction in a coalescing neutron star binary can resonantly excite the g-mode oscillations of the neutron star when the frequency of the tidal driving force equals the intrinsic g-mode frequencies.
Lai, Dong
core   +3 more sources

Three Ultra-short-period Contact Eclipsing Binary Systems Mined from Massive Astronomical Surveys

The Astronomical Journal, 2023
We present the photometric analysis of three ultra-short-period total eclipsing binaries in contact configuration, CRTS_J172718.0+431624, OGLE-BLG-ECL-000104, and OGLE-BLG-ECL-000012, mined from massive astronomical surveys.
Athanasios Papageorgiou, Panagiota-Eleftheria Christopoulou, C. E. Ferreira Lopes, Eleni Lalounta, Márcio Catelan, Andrew J. Drake   +5 more
doaj   +1 more source

1318 New Variable Stars in a 0.25 Square Degree Region of the Galactic Plane [PDF]

, 2010
We have conducted a deep photometric survey of a 0.5 deg x 0.5 deg area of the Galactic Plane using the WFI instrument on the 2.2-m ESO telescope on La Silla, Chile. The dataset comprises a total of 267 R-band images, 204 from a 16 day observation run in
Alard, Albrecht, Albrow, Albrow, Albrow, Bayne, Bessell, Bonnarel, Bramich, C. Afonso, Cargile, Carpenter, Christiansen, Covino, Davidge, Hebb, Irwin, Lomb, M. D. Albrow, Monet, O'Connell, Ochsenbein, Pojmanski, Rucinski, Rucinski, Rucinski, Skrutskie, Soszynski, Soszynski, Soszynski, Stassun, Stassun, Stellingwerf, Stetson, Th. Henning, V. R. Miller, Weldrake, Weldrake, Wozniak, Wyrzykowski   +39 more
core   +2 more sources

On the properties of contact binary stars

, 2004
A catalogue of light curve solutions of contact binary stars has been compiled. It contains the results of 159 light curve solutions. Properties of contact binary stars were studied by using the catalogue data. As it is well known since Lucy's (1968a,b)
Binnendijk, Bradstreet, Flower, Kalimeris, Kuiper, Kähler, Kähler, Kähler, Kähler, Kähler, Liu, Lucy, Lucy, Lucy, Maceroni, Maceroni, Mochnacki, P. Klagyivik, Pribulla, Rucinski, Sz. Csizmadia, Vinkó, Webbink   +22 more
core   +1 more source

A ROSAT Survey of Contact Binary Stars

, 2005
Contact binary stars are common variable stars which are all believed to emit relatively large fluxes of x-rays. In this work we combine a large new sample of contact binary stars derived from the ROTSE-I telescope with x-ray data from the ROSAT All-Sky ...
Hunsch M., M. T. Geske, McGale P. A., S. J. Gettel, T. A. McKay, Voges W.   +5 more
core   +1 more source

The Frequency of Binary Stars in the Core of 47 Tucanae

, 2001
Differential time series photometry has been derived for 46422 main-sequence stars in the core of 47 Tucanae. The observations consisted of near-continuous 160-s exposures alternating between the F555W and F814W filters for 8.3 days in 1999 July with ...
Alard C., Ata Sarajedini, Bacon D., Belloni T., Bertelli G., Bopp B. W., Callanan P. J., Cutispoto G., Davies M. B., Duquennoy A., Elson R. A. W., Heggie D. C., Heggie D. C., Kaluzny J., Kaluzny J., Kaluzny J., Keppens R., Keppens R., Mathieu R. D., Menzies J. W., Meylan G., Michael D. Albrow, Peter D. Edmonds, Portegies Zwart S. F., Puragra Guhathakurta, Rahunen T., Robertson J. A., Ronald L. Gilliland, Timothy M. Brown, van den Berg M., Vilhu O., Yan L.   +31 more
core   +1 more source

Eclipsing binaries in the MACHO database: New periods and classifications for 3031 systems in the Large Magellanic Cloud [PDF]

, 2007
Eclipsing binaries offer a unique opportunity to determine fundamental physical parameters of stars using the constraints on the geometry of the systems. Here we present a reanalysis of publicly available two-color observations of about 6800 stars in the
A. Derekas, Aubourg E., Giuricin G., Johnson A., L. L. Kiss, Lah P., Palen S., Pojmanski G., T. R. Bedding, Udalski A.   +9 more
core   +2 more sources

X-Ray and UV Observations of the Contact Binary KIC 9832227

The Astronomical Journal, 2023
We investigate the X-ray and UV emission from the contact binary star KIC 9832227, which was observed with XMM-Newton for one orbital cycle. The binary is detected with an average X-ray luminosity of 3.4 × 10 ^30 erg s ^−1 .
Dirk Pandel, Lawrence A. Molnar
doaj   +1 more source

Hydrodynamics of Coalescing Binary Neutron Stars: Ellipsoidal Treatment

, 1994
We employ an approximate treatment of dissipative hydrodynamics in three dimensions to study the coalescence of binary neutron stars driven by the emission of gravitational waves.
Lai, Dong, Shapiro, Stu
core   +1 more source

Contact-binary Evolution with Energy Transfer and Saturated Magnetic Braking

The Astrophysical Journal
The evolution of low-mass contact binaries is influenced by angular momentum loss, mass and energy transfer (ET), and the nuclear evolution of the components.
Matthias Fabry, Andrej Prša
doaj   +1 more source