Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Dunn, Jay"'
Publikováno v:
2018, ApJ, 854, 166D
We analyze the 2011 HST/COS spectrum of the Seyfert 1 galaxy NGC 3516, which demonstrates clear changes in one of the intrinsic absorption troughs (component 5), slight evidence of change in a second trough (component 6), and the appearance of a new
Externí odkaz:
http://arxiv.org/abs/1805.04406
Autor:
Dunn, Jay P., Wasik, Branden, Holtzclaw, Christin L., Yenerall, David, Bautista, Manuel, Arav, Nahum, Hayes, Daniel, Moe, Max, Ho, Luis C., Dutton, S. Harper
Publikováno v:
ApJ, 808, 94, 2015
We conduct a spectroscopic search of quasars observed by the Sloan Digital Sky Survey (SDSS) with broad absorption line (BAL) troughs due to Mg II and troughs due to Fe II that simultaneously exhibit strong Balmer narrow emission lines (NELs). We fin
Externí odkaz:
http://arxiv.org/abs/1509.05060
Autor:
Dunn, Jay Patrick
Publikováno v:
Physics and Astronomy Dissertations.
We present a survey of 72 Seyfert galaxies and quasars observed by the Far Ultraviolet Spectroscopic Explorer (FUSE). Our survey is the largest to date searching for intrinsic UV absorption with high spectral resolution, and is the first step toward
Externí odkaz:
http://digitalarchive.gsu.edu/phy_astr_diss/21
http://digitalarchive.gsu.edu/cgi/viewcontent.cgi?article=1020&context=phy_astr_diss
http://digitalarchive.gsu.edu/cgi/viewcontent.cgi?article=1020&context=phy_astr_diss
Autor:
Bautista, Manuel A., Fivet, Vanessa, Quinet, Pascal, Dunn, Jay, Kallman, Theodore R. Gull. Timothy R., Mendoza, Claudio
We present a method for computing uncertainties in spectral models, i.e. level populations, line emissivities, and emission line ratios, based upon the propagation of uncertainties originating from atomic data. We provide analytic expressions, in the
Externí odkaz:
http://arxiv.org/abs/1301.3463
Autor:
Dunn, Jay P., Arav, Nahum, Aoki, Kentaro, Wilkins, Ashlee, Laughlin, Courtney, Edmonds, Doug, Bautista, Manuel
Publikováno v:
2012 ApJ, 750, 143
We present a study of Broad Absorption Line (BAL) quasar outflows that show S IV ?1063 and S IV* ?1073 troughs. The fractional abundance of S IV and C IV peak at similar value of the ionization parameter, implying that they arise from the same physic
Externí odkaz:
http://arxiv.org/abs/1206.7026
We present analysis of the UV-spectrum of the low-z AGN IRAS-F22456-5125 obtained with the Cosmic Origins Spectrograph on board the Hubble Space Telescope. The spectrum reveals six main kinematic components, spanning a range of velocities of up to 80
Externí odkaz:
http://arxiv.org/abs/1205.0189
Autor:
Edmonds, Doug, Borguet, Benoit, Arav, Nahum, Dunn, Jay P., Penton, Steve, Kriss, Gerard A., Korista, Kirk, Costantini, Elisa, Steenbrugge, Katrien, Gonzalez-Serrano, J. Ignacio, Aoki, Kentaro, Bautista, Manuel, Behar, Ehud, Benn, Chris, Crenshaw, D. Micheal, Everett, John, Gabel, Jack, Kaastra, Jelle, Moe, Maxwell, Scott, Jennifer
We present absorption line analysis of the outflow in the quasar IRAS F04250-5718. Far-ultraviolet data from the Cosmic Origins Spectrograph onboard the Hubble Space Telescope reveal intrinsic narrow absorption lines from high ionization ions (e.g.,
Externí odkaz:
http://arxiv.org/abs/1106.2084
Autor:
Aoki, Kentaro, Oyabu, Shinki, Dunn, Jay P., Arav, Nahum, Edmonds, Doug, Korista, Kirk T., Matsuhara, Hideo, Toba, Yoshiki
We present Subaru observations of the newly discovered luminous quasar AKARI J1757+5907, which shows an absorption outflow in its spectrum. The absorption consists of 9 distinct troughs, and our analysis focuses on the troughs at ~ -1000$ km s^{-1} f
Externí odkaz:
http://arxiv.org/abs/1101.4340
Autor:
Bautista, Manuel A., Dunn, Jay P.
We show that time variations in the UV ionizing continuum of quasars, on scales of $\sim$1 year, affect the dynamic structure of the plasmas responsible for low ionization broad absorption lines. Variations of the ionizing continuum produce non-equil
Externí odkaz:
http://arxiv.org/abs/1006.0919
Autor:
Dunn, Jay P., Bautista, Manuel A., Arav, Nahum, Moe, Maxwell, Korista, Kirk T., Costantini, Elisa, Benn, Chris, Ellison, Sara, Edmonds, Doug
Publikováno v:
Astrophys.J.709:611-631,2010
We present high spectral resolution VLT observations of the BAL quasar SDSS J0318-0600. This high quality data set allows us to extract accurate ionic column densities and determine an electron number density of n_e=10^3.3 +/- 0.2 cm^-3 for the main
Externí odkaz:
http://arxiv.org/abs/0911.3896