Results 81 to 90 of about 202,502 (193)

ON THE MASS-RATIO OF THE ECLIPSING BINARIES OF W UMa TYPE

Odessa Astronomical Publications, 2017
The discrepancy between the photometric and spectroscopic mass-ratio in W UMa-type systems is examined by using all the available mass-ratio data derived by modern techniques from photoelectric and radial velocity curves. The new additional data confirm,
P. G. Niarchos, H. W. Dnerbeck
doaj   +1 more source

Where Are Be/black-hole Binaries?

, 2003
We apply the tidal truncation model proposed by Negueruela & Okazaki(2001) to arbitrary Be/compact star binaries to study the truncation efficiency dependance on the binary parameters. We find that the viscous decretion disks around the Be stars could be
Fan Zhang, Kaper L., Lee U., Porter J. M., Raguzova N. V., Smith D. M., Waters L. B. F. M., X.‐D. Li, Yokogawa J., Z.‐R. Wang, Zamanov R. K., Ziolkowski J.   +11 more
core   +2 more sources

The binary proletariat

First Monday, 2000
In the endless quest to transform itself, capitalism has spawned a new working class. The proletariat was an essential product of the industrial revolution, and the lighter, more efficient capitalism of the digital revolution has created the Binary Proletariat.
openaire   +1 more source

Binary and Millisecond Pulsars [PDF]

Living Reviews in Relativity, 1998
77 pages, 30 figures, available on-line at http://www.livingreviews.org/lrr-2005 ...
openaire   +12 more sources

The Search for Symbiotic Stars in the IPHAS Survey

Open Astronomy, 2012
We have started a project to search for symbiotic stars using the data from IPHAS, the Hα survey of the Northern Galactic plane. Candidates are selected from the IPHAS photometric catalogue based on their colors, combined with the information in the near-
Corradi R. L. M.
doaj   +1 more source

Jet X-Ray Properties of EXO 1846-031 During Its 2019 Outburst

Universe
The Galactic X-ray transient EXO 1846-031 was first discovered during an outburst in 1985 by the EXOSAT mission. The source remained in a quiescent state for nearly 34 years after the first outburst. The source started its second outburst on 23 July 2019.
Riya Bhowmick, Sujoy Kumar Nath, Dipak Debnath, Hsiang-Kuang Chang   +3 more
doaj   +1 more source

Symbiotic Stars: Observations Confront Theory

Open Astronomy, 2012
In this paper, I present and discuss some recent observational results which may have important implications for our understanding of late phases of binary evolution.
Mikołajewska J.
doaj   +1 more source

LONG-TERM ACTIVITY CHANGES OF UV PISOIUM

Odessa Astronomical Publications, 2017
UV Psc has been observed since 1976 at the Ankara and Ege University Observatories. Mean light curves in B and V colours obtained using the maxima levels of observed light curves of the system.
V. Keskin, Z. Tunca, C. Ibanoglu, Z. Aslan, S. O. Selam, Z. Muyesseroglu   +5 more
doaj   +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., Erastova L., Tovmassian G., Torrealba J., Valdez J. R.   +4 more
doaj   +1 more source

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., Kamath U. S., Gurugubelli U. K., Mikołajewska J.   +3 more
doaj   +1 more source