Two rare magnetic cataclysmic variables with extreme cyclotron features identified in the sloan digital sky survey
| Autor: | Paula Szkody, Scott F. Anderson, Gary Schmidt, Patrick B. Hall, Bruce Margon, Antonino Miceli, Mark SubbaRao, James Frith, Hugh Harris, Suzanne Hawley, Brandon Lawton, Ricardo Covarrubias, Kevin Covey, Xiaohui Fan, Thomas Murphy, Vijay Narayanan, Sean Raymond, Armin Rest, Michael A. Strauss, Christopher Stubbs, Edwin Turner, Wolfgang Voges, Amanda Bauer, J. Brinkmann, Gillian R. Knapp, Donald P. Schneider |
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| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
Physics
Accretion (meteorology) media_common.quotation_subject Astrophysics::High Energy Astrophysical Phenomena Cyclotron Astrophysics (astro-ph) FOS: Physical sciences Astronomy and Astrophysics Plasma Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Spectral line law.invention Magnetic field Amplitude Space and Planetary Science law Sky Astrophysics::Solar and Stellar Astrophysics Emission spectrum Astrophysics::Galaxy Astrophysics media_common |
| Zdroj: | ASTROPHYSICAL JOURNAL Artículos CONICYT CONICYT Chile instacron:CONICYT |
| Popis: | Two newly identified magnetic cataclysmic variables discovered in the Sloan Digital Sky Survey (SDSS), SDSSJ155331.12+551614.5 and SDSSJ132411.57+032050.5, have spectra showing highly prominent, narrow, strongly polarized cyclotron humps with amplitudes that vary on orbital periods of 4.39 and 2.6 hrs, respectively. In the former, the spacing of the humps indicates the 3rd and 4th harmonics in a magnetic field of ~60 MG. The narrowness of the cyclotron features and the lack of strong emission lines imply very low temperature plasmas and very low accretion rates, so that the accreting area is heated by particle collisions rather than accretion shocks. The detection of rare systems like these exemplifies the ability of the SDSS to find the lowest accretion rate close binaries. Accepted for publication in the Astrophysical Journal, vol. 583, February 1, 2003; slight revisions and additions in response to referee's comments; 17 pages, 6 figures, AASTeX v4.0 |
| Databáze: | OpenAIRE |
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