Search Results - (Author, Cooperation:M. A. Alpar)
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1Latest Papers from Table of Contents or Articles in PressE. Altindis ; M. A. Alpar ; E. Aksay ; J. Beckwith ; C. Bokel ; R. F. Curl ; R. B. Darnell ; S. J. Elledge ; B. Erman ; J. Frahm ; S. P. Goff ; P. Greengard ; R. Hoffmann ; B. Ilhan ; J. Kaslin ; S. M. Lipkin ; C. Poulopoulou ; E. Raz ; M. A. Rubin ; M. Salturk ; R. R. Schrock ; A. Trautmann ; D. Unutmaz ; H. Weinstein ; C. Kizil
American Association for the Advancement of Science (AAAS)
Published 2013Staff ViewPublication Date: 2013-07-23Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Asphyxia/*chemically induced/mortality ; Hospitalization/statistics & numerical data ; *Human Rights ; Humans ; Tear Gases/*toxicity ; Turkey ; Violence/*prevention & control ; Wounds and Injuries/etiology/mortalityPublished by: -
2Articles: DFG German National LicensesStaff View
ISSN: 1572-946XKeywords: Stars: activity, flare ; Binaries: visual ; X-rays: starsSource: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract Using the archival ROSAT PSPC observations, AB Dor is found to be variable in X-rays. The periodic variations are consistent with previously reported rotational period of 0 d .514. The average spectrum of AB Dor is best represented with two-temperature Raymond-Smith model with kT values of 0.19±0.07 and 1.17±0.02 keV. The quiescent luminosity of the system is found to be 4.36±0.6×1030 ergs s−1. A flare with a rise time of ∼350 seconds is detected during which X-ray luminosity rises from 5.8±1.6×1030 to 15.8±4.9×1030 ergs s−1. We conclude that AB Dor is very similar to the active components of RS CVn binaries and other active classes. In view of the wide separation from the binary companion Rst 137B, this activity must be intrinsic to the active star.Type of Medium: Electronic ResourceURL: -
3Articles: DFG German National LicensesAlpar, M. A. ; Fushiki, I. ; Lamb, F. K. ; Miller, G. S. ; Park, M.-G. ; Pines, D.
[s.l.] : Nature Publishing Group
Published 1989Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] THE supernova explosion of February 1987 in the Large Magellanic Cloud has so far provided a wealth of data which, at least in broad outline, has confirmed our expectations of such an event and its aftermath. As the diffuse remnant has expanded and faded, astrophysicists have watched with mounting ...Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesAlpar, M. A. ; Cheng, A. F. ; Ruderman, M. A. ; Shaham, J.
[s.l.] : Nature Publishing Group
Published 1982Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Several kinds of observations support the view that many neutron stars in the close accreting binaries which constitute the galactic bulge X-ray sources have weak (B " 1011 G) surface magnetic fields: (1) analyses of post-burst cooling of X-ray bursters imply that accretion has been effective over ...Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesLamb, F. K. ; Shibazaki, N. ; Alpar, M. A. ; Shaham, J.
[s.l.] : Nature Publishing Group
Published 1985Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Quasi-periodic oscillations with frequencies in the range 5–50 Hz have recently been discovered in X-rays from two bright galactic-bulge sources and ScoX-1. We propose that these sources are weakly magnetic neutron stars accreting from disks in which the plasma is clumped. The interaction of ...Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesStaff View
ISSN: 1573-7357Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract A simple model for the rotating two-fluid system with cylindrical symmetry is examined. Separable solutions for the rates of rotation are found. These solutions have a time-invariant spatial dependence of the rotation rates, whose overall scale $$\tilde \Omega _s (t)$$ evolves with time according to $$\tilde \Omega _s (t) = {{\tilde \Omega _s (0)} \mathord{\left/ {\vphantom {{\tilde \Omega _s (0)} {(1 \pm \alpha \tilde \Omega (0)t)}}} \right. \kern-\nulldelimiterspace} {(1 \pm \alpha \tilde \Omega (0)t)}}$$ , where α is a constant determined by the mutual friction parameters. Experimental prospects are discussed.Type of Medium: Electronic ResourceURL: