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Your search keyword '"Hailey, C.J."' showing total 2 results
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2 results on '"Hailey, C.J."'

1. The Phoenix galaxy as seen by NuSTAR

Author

Stephanie M. LaMassa, Matteo Guainazzi, Fiona A. Harrison, Dominic J. Walton, Walter Craig, C. J. Hailey, Michael Koss, S. E. Boggs, Daniel Stern, Andrea Comastri, Franz E. Bauer, Finn Erland Christensen, Claudio Ricci, M. Brightman, Mislav Baloković, Duncan Farrah, Simonetta Puccetti, P. G. Boorman, William W. Zhang, Poshak Gandhi, Alberto Masini, Masini, A., Comastri, A., Puccetti, S., Baloković, M., Gandhi, P., Guainazzi, M., Bauer, F.E., Boggs, S.E., Boorman, P.G., Brightman, M., Christensen, F.E., Craig, W.W., Farrah, D., Hailey, C.J., Harrison, F.A., Koss, M.J., Lamassa, S.M., Ricci, C., Stern, D., Walton, D.J., and Zhang, W.W.

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Seyfert [Galaxies], active [Galaxies], biology, 010308 nuclear & particles physics, galaxies: active, Flux, FOS: Physical sciences, Astronomy and Astrophysics, Context (language use), Astrophysics, Astronomy and Astrophysic, biology.organism_classification, 01 natural sciences, Galaxy, galaxies: Seyfert, galaxies [X-rays], X-rays: galaxies, Space and Planetary Science, 0103 physical sciences, Astrophysics - High Energy Astrophysical Phenomena, Phoenix, 010303 astronomy & astrophysics, X-rays: galaxie
Abstract

著者人数: 21名, Accepted: 2016-09-01, 資料番号: SA1160316000

Published
2016
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2. NuSTAR reveals extreme absorption in z < 0.5 Type 2 quasars

Author

Finn Erland Christensen, Fiona A. Harrison, C. J. Hailey, Franz E. Bauer, A. Del Moro, Francesca Civano, James Aird, Roberto J. Assef, Birong Luo, Brian W. Grefenstette, Daniel Stern, Michael Koss, David M. Alexander, L. Zappacosta, Stephanie M. LaMassa, A. Annuar, Simonetta Puccetti, Ryan C. Hickox, M. Brightman, Andrea Comastri, S. E. Boggs, George B. Lansbury, William W. Craig, Poshak Gandhi, William W. Zhang, Mislav Baloković, W. N. Brandt, Ezequiel Treister, David R. Ballantyne, Cristian Vignali, Lansbury, G.B., Gandhi, P., Alexander, D.M., Assef, R.J., Aird, J., Annuar, A., Ballantyne, D.R., Baloković, M., Bauer, F.E., Boggs, S.E., Brandt, W.N., Brightman, M., Christensen, F.E., Civano, F., Comastri, A., Craig, W.W., Del Moro, A., Grefenstette, B.W., Hailey, C.J., Harrison, F.A., Hickox, R.C., Koss, M., Lamassa, S.M., Luo, B., Puccetti, S., Stern, D., Treister, E., Vignali, C., Zappacosta, L., Zhang, W.W., ITA, and USA

Subjects
Physics, education.field_of_study, active [Galaxies], 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Population, galaxies: active, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Quasar, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Type (model theory), 01 natural sciences, Astrophysics - Astrophysics of Galaxies, Redshift, galaxies [X-rays], X-rays: galaxies, Space and Planetary Science, 0103 physical sciences, Source counts, Absorption (electromagnetic radiation), education, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics
Abstract

The intrinsic column density (NH) distribution of quasars is poorly known. At the high obscuration end of the quasar population and for redshifts z 1.5e24 cm^-2) type 2 quasars (CTQSO2s); five new NuSTAR observations are reported herein, and four have been previously published. The candidate CTQSO2s lie at z~ 90 net source counts at 8-24 keV). For these NuSTAR-detected sources direct (i.e., X-ray spectral) constraints on the intrinsic AGN properties are feasible, and we measure column densities ~2.5-1600 times higher and intrinsic (unabsorbed) X-ray luminosities ~10-70 times higher than pre-NuSTAR constraints from Chandra and XMM-Newton. Assuming the NuSTAR-detected type 2 quasars are representative of other Compton-thick candidates, we make a correction to the NH distribution for optically selected type 2 quasars as measured by Chandra and XMM-Newton for 39 objects. With this approach, we predict a Compton-thick fraction of f_CT = 36^{+14}_{-12} %, although higher fractions (up to 76%) are possible if indirect absorption diagnostics are assumed to be reliable., Comment: 19 pages, 13 figures, 5 tables. Accepted for publication in ApJ

Published
2015

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