Zobrazeno 61 - 70
of 503
pro vyhledávání: '"Hall, Patrick B."'
Autor:
Richards, Gordon T., Kruczek, Nicholas E., Gallagher, S. C., Hall, Patrick B., Hewett, Paul C., Leighly, Karen M., Deo, Rajesh P., Kratzer, Rachael M., Shen, Yue
Publikováno v:
Astron.J.141:167-183,2011
Using a sample of 30,000 quasars from SDSS-DR7, we explore the range of properties exhibited by high-ionization, broad emission lines, such as CIV 1549. Specifically we investigate the anti-correlation between L_UV and emission line EQW (the Baldwin
Externí odkaz:
http://arxiv.org/abs/1011.2282
Autor:
Rafiee, Alireza, Hall, Patrick B.
We find that the recently reported departure from the Eddington luminosity limit for the highest quasar black hole masses at a given redshift is an artifact due to biases in black hole mass measurements. This sub-Eddington boundary (with non-unity sl
Externí odkaz:
http://arxiv.org/abs/1011.1268
Autor:
Hall, Patrick B., Anosov, Konstantin, White, R. L., Brandt, W. N., Gregg, M. D., Gibson, R. R., Becker, R. H., Schneider, D. P.
We have observed a dramatic change in the spectrum of the formerly heavily absorbed `overlapping-trough' iron low-ionization broad absorption line (FeLoBAL) quasar FBQS J1408+3054. Over a time span of between 0.6 to 5 rest-frame years, the Mg II trou
Externí odkaz:
http://arxiv.org/abs/1010.3728
Autor:
Rogerson, Jesse A., Hall, Patrick B., Snedden, Stephanie A., Brotherton, Michael S., Anderson, Scott F.
Publikováno v:
New Astronomy, 16, 128-137 (2011)
We report sensitive Chandra X-ray non-detections of two unusual, luminous Iron Low-Ionization Broad Absorption Line Quasars (FeLoBALs). The observations do detect a non-BAL, wide-binary companion quasar to one of the FeLoBAL quasars. We combine X-ray
Externí odkaz:
http://arxiv.org/abs/1007.3464
Autor:
Shen, Yue, Richards, Gordon T., Strauss, Michael A., Hall, Patrick B., Schneider, Donald P., Snedden, Stephanie, Bizyaev, Dmitry, Brewington, Howard, Malanushenko, Viktor, Malanushenko, Elena, Oravetz, Dan, Pan, Kaike, Simmons, Audrey
Publikováno v:
Astrophys.J. Suppl. 194 (2011) 45
We present a compilation of properties of the 105,783 quasars in the SDSS Data Release 7 (DR7) quasar catalog. In this value-added product, we compile continuum and emission line measurements around the Halpha, Hbeta, MgII and CIV regions, as well as
Externí odkaz:
http://arxiv.org/abs/1006.5178
Autor:
Inada, Naohisa, Oguri, Masamune, Shin, Min-Su, Kayo, Issha, Strauss, Michael A., Hennawi, Joseph F., Morokuma, Tomoki, Becker, Robert H., White, Richard L., Kochanek, Christopher S., Gregg, Michael D., Chiu, Kuenley, Johnston, David E., Clocchiatti, Alejandro, Richards, Gordon T., Schneider, Donald P., Frieman, Joshua A., Fukugita, Masataka, Gott III, J. Richard, Hall, Patrick B., York, Donald G., Castander, Francisco J., Bahcall, Neta A.
Publikováno v:
Astron.J.140:403-415,2010
We present the second report of our systematic search for strongly lensed quasars from the data of the Sloan Digital Sky Survey (SDSS). From extensive follow-up observations of 136 candidate objects, we find 36 lenses in the full sample of 77,429 spe
Externí odkaz:
http://arxiv.org/abs/1005.5570
Autor:
Schneider, Donald P., Richards, Gordon T., Hall, Patrick B., Strauss, Michael A., Anderson, Scott F., Boroson, Todd A., Ross, Nicholas P., Shen, Yue, Brandt, W. N., Fan, Xiaohui, Inada, Naohisa, Jester, Sebastian, Knapp, G. R., Krawczyk, Coleman M., Thakar, Anirudda R., Berk, Daniel E. Vanden, Voges, Wolfgang, Yanny, Brian, York, Donald G., Bahcall, Neta A., Bizyaev, Dmitry, Blanton, Michael R., Brewington, Howard, Brinkmann, J., Eisenstein, Daniel, Frieman, Joshua A., Fukugita, Masataka, Gray, Jim, Gunn, James E., Hibon, Pascale, Ivezic, Zeljko, Kent, Stephen M., Kron, Richard G., Lee, Myung Gyoon, Lupton, Robert H., Malanushenko, Elena, Malanushenko, Viktor, Oravetz, Dan, Pan, K., Pier, Jeffrey R., Price III, Ted N., Saxe, David H., Schlegel, David J., Simmons, Audry, Snedden, Stephanie A., SubbaRao, Mark U., Szalay, Alexander S., Weinberg, David H.
Publikováno v:
Astron.J.139:2360-2373,2010
We present the fifth edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog, which is based upon the SDSS Seventh Data Release. The catalog, which contains 105,783 spectroscopically confirmed quasars, represents the conclusion of the SDSS-I an
Externí odkaz:
http://arxiv.org/abs/1004.1167
Autor:
McGreer, Ian D., Hall, Patrick B., Fan, Xiaohui, Bian, Fuyan, Inada, Naohisa, Oguri, Masamune, Strauss, Michael A., Schneider, Donald P., Farnsworth, Kara
We report the discovery of a gravitationally lensed quasar identified serendipitously in the Sloan Digital Sky Survey (SDSS). The object, SDSS J094604.90+183541.8, was initially targeted for spectroscopy as a luminous red galaxy, but the SDSS spectru
Externí odkaz:
http://arxiv.org/abs/1002.3832
Autor:
Kayo, Issha, Inada, Naohisa, Oguri, Masamune, Morokuma, Tomoki, Hall, Patrick B., Kochanek, Christopher S., Schneider, Donald P.
Publikováno v:
Astron.J.139:1614-1621,2010
We report the discovery and confirmation of eight new two-image lensed quasars by the Sloan Digital Sky Survey (SDSS) Quasar Lens Search. The lenses are SDSSJ0904+1512 (image separation \theta=1"13, source redshift z_s=1.826), SDSSJ1054+2733 (\theta=
Externí odkaz:
http://arxiv.org/abs/0912.1462
Autor:
Ross, Nicholas P., Shen, Yue, Strauss, Michael A., Berk, Daniel E. Vanden, Connolly, Andrew J., Richards, Gordon T., Schneider, Donald P., Weinberg, David H., Hall, Patrick B., Bahcall, Neta A., Brunner, Robert J.
We present measurements of the quasar two-point correlation function, \xi_{Q}, over the redshift range z=0.3-2.2 based upon data from the SDSS. Using a homogeneous sample of 30,239 quasars with spectroscopic redshifts from the DR5 Quasar Catalogue, o
Externí odkaz:
http://arxiv.org/abs/0903.3230