Zobrazeno 1 - 10
of 13
pro vyhledávání: '"N. A. Bahcall"'
Autor:
Amy Kimball, Daniel Oravetz, Scott F. Anderson, Michael Richmond, Xiaohui Fan, Ohad Shemmer, Patrick B. Hall, A. Simmonds, Donald P. Schneider, W. Voges, N. A. Bahcall, K. Pan, A. M. Diamond-Stanic, S. A. Snedden, D. G. York, Howard Brewington, Dmitry Bizyaev, W. N. Brandt, E. Malanushenko, V. Malanushenko, Richard M. Plotkin
Publikováno v:
Astronomical Journal, 139(2), 390-414. IOP Publishing Ltd.
We present a sample of 723 optically selected BL Lac candidates from the SDSS DR7 spectroscopic database encompassing 8250 deg^2 of sky; our sample constitutes one of the largest uniform BL Lac samples yet derived. Each BL Lac candidate has a high-qu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba5dd6d4e3f309e93fc5fefa9a8a89b2
https://dare.uva.nl/personal/pure/en/publications/optically-selected-bl-lacertae-candidates-from-the-sloan-digital-sky-survey-data-release-seven(52bcd583-8b1b-45a1-814d-7d4b4ffe546d).html
https://dare.uva.nl/personal/pure/en/publications/optically-selected-bl-lacertae-candidates-from-the-sloan-digital-sky-survey-data-release-seven(52bcd583-8b1b-45a1-814d-7d4b4ffe546d).html
Autor:
N. A. Bahcall, David J. Schlegel, David Shih, Masataka Fukugita, J. Brinkmann, David H. Weinberg, Steve Kent, Renyue Cen, Uroš Seljak, D. E. vanden Berk, John W. Briggs, Scott Burles, Z. Ivezic, Donald P. Schneider, Patrick McDonald
Publikováno v:
The Astrophysical Journal. 635:761-783
We analyze the SDSS Ly-alpha forest P_F(k,z) measurement to determine the linear theory power spectrum. Our analysis is based on fully hydrodynamic simulations, extended using hydro-PM simulations. We account for the effect of absorbers with damping
Autor:
K. Shimasaku, J. Brinkmann, David W. Hogg, Michael S. Vogeley, Ivan K. Baldry, I. Csabai, David H. Weinberg, Robert H. Lupton, M. R. Blanton, Daniel J. Eisenstein, Jeffrey A. Munn, Michael A. Strauss, Robert C. Nichol, N. A. Bahcall, S. Okamura, Masataka Fukugita, Jonathan Loveday, James E. Gunn, Z. Ivezic, David J. Schlegel, D. Q. Lamb
Publikováno v:
The Astrophysical Journal. 594:186-207
Using photometry and spectroscopy of 183,487 galaxies from the Sloan Digital Sky Survey, we present bivariate distributions of pairs of seven galaxy properties: four optical colors, surface brightness, radial profile shape as measured by the Sersic i
Autor:
D. P. Finkbeiner, Max Tegmark, N. A. Bahcall, Jonathan Loveday, D. G. York, Gillian R. Knapp, James E. Gunn, Alexey Makarov, Robert H. Lupton, M. R. Blanton, Daniel J. Eisenstein, David J. Schlegel, Michael A. Strauss, Nikhil Padmanabhan, J. Brinkmann, U. Seljak, Donald P. Schneider, Z. Ivezic, David W. Hogg, Robert C. Nichol
Publikováno v:
Padmanabhan, N, Schlegel, D J, Seljak, U, Makarov, A, Bahcall, N A, Blanton, M R, Brinkmann, J, Eisenstein, D J, Finkbeiner, D P, Gunn, J E, Hogg, D W, Ivezic, Z, Knapp, G R, Loveday, J, Lupton, R H, Nichol, R C, Schneider, D P, Strauss, M A, Tegmark, M & York, D G 2007, ' The clustering of luminous red galaxies in the Sloan Digital Sky Survey imaging data ', Monthly Notices of the Royal Astronomical Society, vol. 378, no. 3, pp. 852-872 . https://doi.org/10.1111/j.1365-2966.2007.11593.x
We present the 3D real space clustering power spectrum of a sample of \~600,000 luminous red galaxies (LRGs) measured by the Sloan Digital Sky Survey (SDSS), using photometric redshifts. This sample of galaxies ranges from redshift z=0.2 to 0.6 over
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d553f324999c1a6c3e67849872e35975
https://researchportal.port.ac.uk/portal/en/publications/the-clustering-of-luminous-red-galaxies-in-the-sloan-digital-sky-survey-imaging-data(9ca70e6e-f7e2-45d3-8f7b-91675018b11a).html
https://researchportal.port.ac.uk/portal/en/publications/the-clustering-of-luminous-red-galaxies-in-the-sloan-digital-sky-survey-imaging-data(9ca70e6e-f7e2-45d3-8f7b-91675018b11a).html
Autor:
Jonathan Loveday, Huan Lin, Daniel J. Eisenstein, Karl Glazebrook, Robert C. Nichol, J. Annis, M. R. Blanton, J. Brinkmann, Ivan K. Baldry, I. Csabai, N. A. Bahcall, D. P. Schneider, Timothy M. Heckman, Tamás Budavári
Publikováno v:
Baldry, I K, Glazebrook, K, Budavari, T, Eisenstein, D J, Annis, J, Bahcall, N A, Blanton, M, Brinkmann, J, Csabai, I, Heckman, T M, Lin, H, Loveday, J, Nichol, B & Schneider, D P 2005, ' The Sloan Digital Sky Survey u-band Galaxy Survey : luminosity functions and evolution ', Monthly Notices of the Royal Astronomical Society, vol. 358, no. 2, pp. 441-456 . https://doi.org/10.1111/j.1365-2966.2005.08799.x
We construct and analyse a u-band selected galaxy sample from the Sloan Digital Sky Survey (SDSS) Southern Survey, which covers 275 deg2. The sample includes 43223 galaxies with spectroscopic redshifts in the range 0.005 < z < 0.3 and with 14.5 < u <
Autor:
Ravi K. Sheth, Daniel J. Eisenstein, Scott Burles, Mark SubbaRao, Robert H. Lupton, Paul L. Schechter, J. Brinkmann, Douglas P. Finkbeiner, David J. Schlegel, David W. Hogg, Kazuhiro Shimasaku, Z. Ivezic, Mariangela Bernardi, Joshua A. Frieman, N. A. Bahcall
The distribution of early-type galaxy velocity dispersions, phi(sigma), is measured using a sample drawn from the SDSS database. Its shape differs significantly from that which one obtains by simply using the mean correlation between luminosity, L, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0fdad35f5edd451340fd2c2eabac2b2d
http://arxiv.org/abs/astro-ph/0303092
http://arxiv.org/abs/astro-ph/0303092
Autor:
Kristen Menou, Daniel E. Vanden Berk, Željko Ivezić, Rita S. J. Kim, Gillian R. Knapp, Gordon T. Richards, Iskra Strateva, Xiaohui Fan, James E. Gunn, Patrick B. Hall, Tim Heckman, Julian Krolik, Robert H. Lupton, Donald P. Schneider, Donald G. York, S. F. Anderson, N. A. Bahcall, J. Brinkmann, R. Brunner, I. Csabai, M. Fukugita, G. S. Hennessy, P. Z. Kunszt, D. Q. Lamb, J. A. Munn, R. C. Nichol, G. P. Szokoly
Publikováno v:
ASTROPHYSICAL JOURNAL
Artículos CONICYT
CONICYT Chile
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Artículos CONICYT
CONICYT Chile
instacron:CONICYT
We present 13 Broad Absorption Line (BAL) quasars, including 12 new objects, which were identified in the Sloan Digital Sky Survey (SDSS) and matched within 2'' to sources in the FIRST radio survey catalog. The surface density of this sample of radio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a30b29ce794aabc91012db89d32c12a
Autor:
N. A. Bahcall, M. A. Hausman
Publikováno v:
The Astrophysical Journal. 213:93
Star counts on short-exposure plates are presented for eight globular clusters. The data are given to several limiting magnitudes for each cluster. Projected radial distributions are determined from the star counts; no significant segregation is obse
Autor:
H. Spinrad, N. A. Bahcall
Publikováno v:
Publications of the Astronomical Society of the Pacific. 88:660
The redshifts of the cluster Abell 2241 have been determined from spectra of five galaxies. The area is found to contain two clusters (or groups) with different redshifts (z = 0.063 and z = 0.101). The X-ray luminosity of the cluster, if the identifi
Publikováno v:
The Astrophysical Journal. 209:L17
Radio observations at 610 MHz with the Westerbork Synthesis Radio Telescope (WSRT) are combined with optical data from the 48 inch Palomar telescope to search for radio-optical candidates for five high-latitude Uhuru X-ray sources (3U 0042+32, 0917+6