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Proceedings of the American Mathematical Society, 1961 The above sequences have the following interpretation [2]: the elements which are -1 are those with subscript given mod n by n=5: Mn4+3, mf O (mod5), n= 7: rm2+3, mf O (mod7), n = 11: -M2 2, (mod 11), n = 13: llm4 1, (mod 13). It will be shown here that for odd n, these are all the sequences with the property Ck I < 1. For the sake of completeness, the
R. Turyn, J. Storer
openaire +1 more source
SBS 0802+529: A New Variable Star from the Second Byurakan Survey
Open Astronomy, 2012 A new emission line star was discovered on the plates of the Second Byurakan Survey (SBS). the follow up spectroscopy demonstrated that the object had a spectrum dominated by a late-type giant star with superposed hydrogen emission lines.
Chavushyan V. +4 more
doaj +1 more source
The evolution of photo-evaporating viscous discs in binaries [PDF]
, 2017 A large fraction of stars are in binary systems, yet the evolution of proto-planetary discs in binaries has been little explored from the theoretical side.
Clarke, Cathie J., Rosotti, Giovanni P.
core +2 more sources
Spectroscopic Monotoring of the Symbiotic Star BX Monocerotis
Open Astronomy, 2012 Low resolution optical spectra of the symbiotic star BX Monocerotis in the 3500-9000 Å range obtained during 1999–2010 are described. the spectrum of BX Mon at all phases is dominated by the cool component, with a red continuum and TiO absorption ...
Anupama G. C. +3 more
doaj +1 more source
Evaluating GAIA performances on eclipsing binaries. I. Orbits and stellar parameters for V505 Per, V570 Per and OO Peg [PDF]
, 2001 The orbits and physical parameters of three detached, double-lined A-F eclipsing binaries have been derived combining H_P, V_T, B_T photometry from the Hipparcos/Tycho mission with 8500-8750 Ang ground-based spectroscopy, mimicking the photometric ...
A. Prša +26 more
core +4 more sources
News on the X-ray emission from hot subdwarf stars
Open Astronomy, 2017 In latest years, the high sensitivity of the instruments on-board the XMM-Newton and Chandra satellites allowed us to explore the properties of the X-ray emission from hot subdwarf stars.
Palombara Nicola La, Mereghetti Sandro
doaj +1 more source
Search for Supermassive Black Hole Binaries in the Sloan Digital Sky Survey Spectroscopic Sample
, 2013 Supermassive black hole (SMBH) binaries are expected in a Lambda CDM cosmology given that most (if not all) massive galaxies contain a massive black hole at their center. So far, however, direct evidence for such binaries has been elusive.
Badenes, Carles +4 more
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Gravitational Radiation from Black Hole Binaries in Globular Clusters [PDF]
, 2001 A populations of stellar mass black hole binaries may exist in globular clusters. The dynamics of globular cluster evolution imply that there may be at most one black hole binary is a globular cluster.
Benacquista M J +3 more
core +3 more sources
Visual Binaries in the Orion Nebula Cluster
, 2007 We have carried out a major survey for visual binaries towards the Orion Nebula Cluster using HST images obtained with an H-alpha filter. Among 781 likely ONC members more than 60" from theta-1 Ori C, we find 78 multiple systems (75 binaries and 3 ...
Baraffe I. +15 more
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Low Frequency Gravitational Waves from White Dwarf MACHO Binaries [PDF]
, 2000 The possibility that Galactic halo MACHOs are white dwarfs has recently attracted much attention. Using the known properties of white dwarf binaries in the Galactic disk as a model, we estimate the possible contribution of halo white dwarf binaries to ...
Ben Kulick +4 more
core +2 more sources