Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Richards, GT"'
Publikováno v:
Rivera, A B, Richards, G T, Gallagher, S C, McCaffrey, T V, Rankine, A L, Hewett, P C & Shemmer, O 2022, ' Exploring Changes in Quasar Spectral Energy Distributions across C iv Parameter Space ', Astrophysical Journal, vol. 931, no. 2, 154, pp. 1-19 . https://doi.org/10.3847/1538-4357/ac6a5d
Physics and Astronomy Publications
Physics and Astronomy Publications
We examine the UV/X-ray properties of 1378 quasars in order to link empirical correlations to theoretical models of the physical mechanisms dominating quasars as a function of mass and accretion rate. The clarity of these correlations is improved whe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1255b585ada59e4a54476162d0a93316
https://hdl.handle.net/20.500.11820/6201842a-b88f-4baa-a1b3-de2d870a5513
https://hdl.handle.net/20.500.11820/6201842a-b88f-4baa-a1b3-de2d870a5513
We use multi-epoch quasar spectroscopy to determine how accurately single-epoch spectroscopy can locate quasars in emission-line parameter space in order to inform investigations where time-resolved spectroscopy is not available. We explore the impro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b608d1a6e83d8e6012b4bc7134f8fb3
https://www.repository.cam.ac.uk/handle/1810/309491
https://www.repository.cam.ac.uk/handle/1810/309491
The C $\small \text{IV}$λλ1498,1501 broad emission line is visible in optical spectra to redshifts exceeding $z$ ∼ 5. C $\small \text{IV}$ has long been known to exhibit significant displacements to the blue and these ‘blueshifts’ almost cert
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d5424778b01d6e969894fc2f0b398c8
https://www.repository.cam.ac.uk/handle/1810/261989
https://www.repository.cam.ac.uk/handle/1810/261989
Black-hole masses are crucial to understanding the physics of the connection between quasars and their host galaxies and measuring cosmic black hole-growth. At high redshift, z > 2.1, black hole masses are normally derived using the velocity-width of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bcb2ef8921d2c91850f9c703d2551996
Autor:
Archambault, S, Aune, T, Behera, B, Beilicke, M, Benbow, W, Berger, K, Bird, R, Biteau, J, Bugaev, V, Byrum, K, Cardenzana, JV, Cerruti, M, Chen, X, Ciupik, L, Connolly, MP, Cui, W, Dumm, J, Errando, M, Falcone, A, Federici, S, Feng, Q, Finley, JP, Fleischhack, H, Fortson, L, Furniss, A, Galante, N, Gillanders, GH, Griffin, S, Griffiths, ST, Grube, J, Gyuk, G, Hanna, D, Holder, J, Hughes, G, Humensky, TB, Johnson, CA, Kaaret, P, Kertzman, M, Khassen, Y, Kieda, D, Krawczynski, H, Krennrich, F, Kumar, S, Lang, MJ, Madhavan, AS, Maier, G, McCann, A, Meagher, K, Moriarty, P, Mukherjee, R, Nieto, D, De Bhróithe, AOF, Ong, RA, Otte, AN, Park, N, Pohl, M, Popkow, A, Prokoph, H, Quinn, J, Ragan, K, Rajotte, J, Reyes, LC, Reynolds, PT, Richards, GT, Roache, E, Sembroski, GH, Shahinyan, K, Staszak, D, Telezhinsky, I, Tucci, JV, Tyler, J, Varlotta, A, Vassiliev, VV, Vincent, S, Wakely, SP, Weinstein, A, Welsing, R, Wilhelm, A, Williams, DA, Ackermann, M, Ajello, M, Albert, A, Baldini, L, Bastieri, D, Bellazzini, R, Bissaldi, E, Bregeon, J, Buehler, R, Buson, S, Caliandro, GA, Cameron, RA, Caraveo, PA
Publikováno v:
Archambault, S; Aune, T; Behera, B; Beilicke, M; Benbow, W; Berger, K; et al.(2014). Deep broadband observations of the distant gamma-ray blazar PKS 1424+240. Astrophysical Journal Letters, 785(1). doi: 10.1088/2041-8205/785/1/L16. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/02c2w6nz
We present deep VERITAS observations of the blazar PKS 1424+240, along with contemporaneous Fermi Large Area Telescope, Swift X-ray Telescope, and Swift UV Optical Telescope data between 2009 February 19 and 2013 June 8. This blazar resides at a reds
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od_______325::9e7810723515454b899d03a530ba0375
http://www.escholarship.org/uc/item/02c2w6nz
http://www.escholarship.org/uc/item/02c2w6nz
Autor:
Richards, GT, Weinstein, MA, Schneider, DP, Fan, XH, Strauss, MA, Vanden Berk, DE, Annis, J, Burles, S, Laubacher, EM, York, DG, Frieman, JA, Johnston, D, Scranton, R, Gunn, JE, Nichol, RC, Ivezic, Z, Budavari, T, Csabai, I, Szalay, AS, Connolly, AJ, Szokoly, GP, Bahcall, NA, Benitez, N, Brinkmann, J, Brunner, R, Fukugita, M, Hall, PB, Hennessy, GS, Knapp, GR, Kunszt, PZ, Lamb, DQ, Munn, JA, Newberg, HJ, Stoughton, C
Publikováno v:
ASTRONOMICAL JOURNAL
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
We demonstrate that the design of the Sloan Digital Sky Survey (SDSS) filter system and the quality of the SDSS imaging data are sufficient for determining accurate and precise photometric redshifts (``photo-z''s) of quasars. Using a sample of 2625 q
Autor:
Agueros, MA, Ivezic, Z, Covey, KR, Obric, M, Hao, L, Walkowicz, LM, West, AA, Vanden Berk, DE, Lupton, RH, Knapp, GR, Gunn, JE, Richards, GT, Bochanski, J, Brooks, A, Claire, M, Haggard, D, Kaib, N, Kimball, A, Gogarten, SM, Seth, A, Solontoi, M
Publikováno v:
The Astronomical Journal, 130(3), 1022-1036. IOP PUBLISHING LTD
We discuss the ultraviolet, optical, and infrared properties of the Sloan Digital Sky Survey (SDSS) sources detected by the Galaxy Evolution Explorer ( GALEX) as part of its All-sky Imaging Survey Early Release Observations. Virtually all (> 99%) the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=narcis______::bbbde7c07c24a2e2a85484dcbc576788
https://research.rug.nl/en/publications/b402ce54-acef-4150-9bf7-f977b261a8a8
https://research.rug.nl/en/publications/b402ce54-acef-4150-9bf7-f977b261a8a8
Autor:
Garavini, G, Aldering, G, Amadon, A, Amanullah, R, Astier, P, Balland, C, Blanc, G, Conley, A, Dahlen, T, Deustua, SE, Ellis, R, Fabbro, S, Fadeyev, V, Fan, X, Folatelli, G, Frye, B, Gates, EL, Gibbons, R, Goldhaber, G, Goldman, B, Goobar, A, Groom, DE, Haissinski, J, Hardin, D, Hook, I, Howell, DA, Kent, S, Kim, AG, Knop, RA, Kowalski, M, Kuznetsova, N, Lee, BC, Lidman, C, Mendez, J, Miller, GJ, Moniez, M, Mouchet, M, Mourao, A, Newberg, H, Nobili, S, Nugent, PE, Pain, R, Perdereau, O, Perlmutter, S, Quimby, R, Regnault, N, Rich, J, Richards, GT, Ruiz-Lapuente, P, Schaefer, BE, Schahmaneche, K, Smith, E, Spadafora, AL, Stanishev, V, Thomas, RC, Walton, NA, Wang, L, Wood-Vasey, WM, Project, SC
Publikováno v:
The Astronomical Journal
The Astronomical Journal, American Astronomical Society, 2005, 130, pp.2278-2292. ⟨10.1086/444595⟩
Astronomical Journal
Astronomical Journal, American Astronomical Society, 2005, 130, pp.2278-2292. ⟨10.1086/444595⟩
Garavini, G.; Aldering, G.; Amadon, A.; Amanullah, R.; Astier, P.; Balland, C.; et al.(2005). Spectroscopic Observations and Analysis of the Unusual Type Ia SN 1999ac. Lawrence Berkeley National Laboratory. Lawrence Berkeley National Laboratory: Lawrence Berkeley National Laboratory. Retrieved from: http://www.escholarship.org/uc/item/4zs7m56f
The Astronomical Journal, 2005, 130, pp.2278-2292. ⟨10.1086/444595⟩
The Astronomical Journal, American Astronomical Society, 2005, 130, pp.2278-2292. ⟨10.1086/444595⟩
Astronomical Journal
Astronomical Journal, American Astronomical Society, 2005, 130, pp.2278-2292. ⟨10.1086/444595⟩
Garavini, G.; Aldering, G.; Amadon, A.; Amanullah, R.; Astier, P.; Balland, C.; et al.(2005). Spectroscopic Observations and Analysis of the Unusual Type Ia SN 1999ac. Lawrence Berkeley National Laboratory. Lawrence Berkeley National Laboratory: Lawrence Berkeley National Laboratory. Retrieved from: http://www.escholarship.org/uc/item/4zs7m56f
The Astronomical Journal, 2005, 130, pp.2278-2292. ⟨10.1086/444595⟩
We present optical spectra of the peculiar Type Ia supernova (SN Ia) 1999ac. The data extend from -15 to +42 days with respect to B-band maximum and reveal an event that is unusual in several respects. Prior to B-band maximum, the spectra resemble th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6e1467b36ad77573287640f9896f761
http://hal.in2p3.fr/in2p3-00025098
http://hal.in2p3.fr/in2p3-00025098
Publikováno v:
AGN Physics with the Sloan Digital Sky Survey. 311
The Universe became fully reionized, and observable optically, at a time corresponding to redshift z~6.5, so it is only by studying the HI and molecular absorption lines against higher-redshift, radio-loud sources that one can hope to make detailed s
Autor:
Garavini, G, Folatelli, G, Goobar, A, Nobili, S, Aldering, G, Amadon, A, Amanullah, R, Astier, P, Balland, C, Blanc, G, Burns, MS, Conley, A, Dahlen, T, Deustua, SE, Ellis, R, Fabbro, S, Fan, X, Frye, B, Gates, EL, Gibbons, R, Goldhaber, G, Goldman, B, Groom, DE, Haissinski, J, Hardin, D, Hook, IM, Howell, DA, Kasen, D, Kent, S, Kim, AG, Knop, RA, Lee, BC, Lidman, C, Mendez, J, Miller, GJ, Moniez, M, Mourao, A, Newberg, H, Nugent, PE, Pain, R, Perdereau, O, Perlmutter, S, Prasad, V, Quimby, R, Raux, J, Regnault, N, Rich, J, Richards, GT, Ruiz-Lapuente, P, Sainton, G, Schaefer, BE, Schahmaneche, K, Smith, E, Spadafora, AL, Stanishev, V, Walton, NA, Wang, L, Wood-Vasey, WM, Project, SC
Publikováno v:
Garavini, G.; Folatelli, G.; Goobar, A.; Nobili, S.; Aldering, G.; Amadon, A.; et al.(2003). Spectroscopic observations and analysis of the peculiar SN 1999aa. Lawrence Berkeley National Laboratory. Lawrence Berkeley National Laboratory: Lawrence Berkeley National Laboratory. Retrieved from: http://www.escholarship.org/uc/item/0bh468rg
We present an extensive new time-series of spectroscopic data of the peculiar SN 1999aa in NGC 2595. Our data set includes 25 optical spectra between -11 and +58 days with respect to B-band maximum light, providing an unusually complete time history.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1522f93e41ca234f38fd840cd965b1f0
http://www.escholarship.org/uc/item/0bh468rg
http://www.escholarship.org/uc/item/0bh468rg