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An Improved Test of the Binary Black Hole Hypothesis for Quasars with Double-peaked Broad Balmer Lines

Autor: Doan, Anh, Eracleous, Michael, Runnoe, Jessie C., Liu, Jia, Mathes, Gavin, Flohic, Helene M. L. G., State, Penn, IGC, Michigan, U., U., Vanderbilt, U., Princeton, U., New Mexico State, Pacific, U. of the

Velocity offsets in the broad Balmer lines of quasars and their temporal variations serve as indirect evidence for bound supermassive black hole binaries (SBHBs) at sub-parsec separations. In this work, we test the SBHB hypothesis for 14 quasars with

Externí odkaz: http://arxiv.org/abs/1909.10560

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51 Eri and GJ 3305: A 10-15 Myr old binary star system at 30 parsecs

Autor: Feigelson, E. D., Lawson, W. A., Stark, M., Townsley, L., Garmire, G. P., State, Penn, UNSW/ADFA, Wyoming

Publikováno v: Astron.J.131:1730-1739,2006

Following the suggestion of Zuckerman et al. (2001, ApJ, 562, L87), we consider the evidence that 51 Eri (spectral type F0) and GJ 3305 (M0), historically classified as unrelated main sequence stars in the solar neighborhood, are instead a wide physi

Externí odkaz: http://arxiv.org/abs/astro-ph/0511618

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The Chandra Deep Field-North Survey: XVII. Evolution of magnetic activity in old late-type stars

Autor: Feigelson, E. D., Hornschemeier, A. E., Micela, G., Bauer, F. E., Alexander, D. M., Brandt, W. N., Favata, F., Sciortino, S., Garmire, G. P., State, Penn, Hopkins, Johns, Palermo, Cambridge, ESTEC

Publikováno v: Astrophys.J.611:1107-1120,2004

The extremely sensitive Chandra Deep Field-North (CDF-N) pencil-beam X-ray survey is used to identify and characterize the X-ray emission from old high-latitude main sequence Galactic stars. Our principal goal is to investigate the expected long-term

Externí odkaz: http://arxiv.org/abs/astro-ph/0405026

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