Zobrazeno 51 - 60
of 1 514
pro vyhledávání: '"Georgakakis, A."'
Autor:
Pâris, I., Petitjean, P., Aubourg, E., Myers, A. D., Streblyanska, A., Lyke, B. W., Anderson, S. F., Armengaud, E., Bautista, J., Blanton, M. R., Blomqvist, M., Brinkmann, J., Brownstein, J. R., Brandt, W. N., Burtin, E., Dawson, K., de la Torre, S., Georgakakis, A., Gil-Marin, H., Green, P. J., Hall, P. B., Kneib, J. -P., LaMassa, S. M., Goff, J. -M. Le, MacLeod, C., Mariappan, V., McGreer, I. D., Merloni, A., Noterdaeme, P., Delabrouille, N. Palanque, Percival, W. J., Ross, A. J., Rossi, G., Schneider, D. P., Seo, H. -J., Tojeiro, R., Weaver, B. A., Weijmans, A. -M., Yèche, C., Zarrouk, P., Zhao, G. -B.
Publikováno v:
A&A 613, A51 (2018)
We present the Data Release 14 Quasar catalog (DR14Q) from the extended Baryon Oscillation Spectroscopic Survey (eBOSS) of the Sloan Digital Sky Survey IV (SDSS-IV). This catalog includes all SDSS-IV/eBOSS objects that were spectroscopically targeted
Externí odkaz:
http://arxiv.org/abs/1712.05029
Autor:
Kocevski, Dale D., Barro, Guillermo, Faber, S. M., Dekel, Avishai, Somerville, Rachel S., Young, Joshua A., Williams, Christina C., McIntosh, Daniel H., Georgakakis, Antonis, Hasinger, Guenther, Nandra, Kirpal, Civano, Francesca, Alexander, David M., Almaini, Omar, Conselice, Christopher J., Donley, Jennifer L., Ferguson, Harry C., Giavalisco, Mauro, Grogin, Norman A., Hathi, Nimish, Hawkins, Matthew, Koekemoer, Anton M., Koo, David C., McGrath, Elizabeth J., Mobasher, Bahram, Gonzalez, Pablo G. Perez, Pforr, Janine, Primack, Joel R., Santini, Paola, Stefanon, Mauro, Trump, Jonathan R., van der Wel, Arjen, Wuyts, Stijn, Yan, Haojing
Publikováno v:
2017ApJ...846..112K
We examine the fraction of massive ($M_{*}>10^{10} M_{\odot}$), compact star-forming galaxies (cSFGs) that host an active galactic nucleus (AGN) at $z\sim2$. These cSFGs are likely the direct progenitors of the compact quiescent galaxies observed at
Externí odkaz:
http://arxiv.org/abs/1710.05921
Autor:
Mountrichas, G., Corral, A., Masoura, V. A., Georgantopoulos, I., Ruiz, A., Georgakakis, A., Carrera, F. J., Fotopoulou, S.
Publikováno v:
A&A 608, A39 (2017)
We present photometric redshifts for 1,031 X-ray sources in the X-ATLAS field, using the machine learning technique TPZ (Carrasco Kind & Brunner 2013). X-ATLAS covers 7.1 deg2 observed with the XMM-Newton within the Science Demonstration Phase (SDP)
Externí odkaz:
http://arxiv.org/abs/1710.01313
Autor:
John K. Pearman, Laura Casas, Craig Michell, Naroa Aldanondo, Nazia Mojib, Karie Holtermann, Ioannis Georgakakis, Joao Curdia, Susana Carvalho, Amr Gusti, Xabier Irigoien
Publikováno v:
Metabarcoding and Metagenomics, Vol 6, Iss , Pp 101-115 (2022)
Increasing anthropogenic pressures on the coastal marine environments impact these ecosystems via a variety of mechanisms including nutrient loading, leading to eutrophication and increases in algal blooms. Here, we use a metagenomics approach to ass
Externí odkaz:
https://doaj.org/article/839c1f83d2f442e7bd59a490a26f3663
Publikováno v:
In The Leadership Quarterly June 2022 33(3)
Publikováno v:
In Long Range Planning June 2022 55(3)
We use deep Chandra X-ray imaging to measure the distribution of specific black hole accretion rates ($L_X$ relative to the stellar mass of the galaxy) and thus trace AGN activity within star-forming and quiescent galaxies, as a function of stellar m
Externí odkaz:
http://arxiv.org/abs/1705.01132
Autor:
Georgakakis, A., Aird, J., Schulze, A., Dwelly, T., Salvato, M., Nandra, K., Merloni, A., Schneider, Donald P.
This paper estimates the specific accretion-rate distribution of AGN using a sample of 4821 X-ray sources from both deep and shallow surveys. The specific accretion-rate distribution is defined as the probability of a galaxy with a given stellar mass
Externí odkaz:
http://arxiv.org/abs/1705.01133
Autor:
Georgakakis, A., Salvato, M., Liu, Z., Buchner, J., Brandt, W. N., Ananna, T. Tasnim, Schulze, A., Shen, Yue, LaMassa, S., Nandra, K., Merloni, A., McGreer, I. D.
The wide-area XMM-XXL X-ray survey is used to explore the fraction of obscured AGN at high accretion luminosities, $L_X (\rm 2-10 \, keV) > 10^{44} \, erg \,s ^{-1}$, and out to redshift $z\approx1.5$. The sample covers an area of about $\rm14\,deg^2
Externí odkaz:
http://arxiv.org/abs/1704.08296
Autor:
Dwelly, T., Salvato, M., Merloni, A., Brusa, M., Buchner, J., Anderson, S. F., Boller, Th., Brandt, W. N., Budavári, T., Clerc, N., Coffey, D., Del Moro, A., Georgakakis, A., Green, P. J., Jin, C., Menzel, M. -L., Myers, A. D., Nandra, K., Nichol, R. C., Ridl, J., Schwope, A. D., Simm, T.
SPIDERS (SPectroscopic IDentification of eROSITA Sources) is an SDSS-IV survey running in parallel to the eBOSS cosmology project. SPIDERS will obtain optical spectroscopy for large numbers of X-ray-selected AGN and galaxy cluster members detected in
Externí odkaz:
http://arxiv.org/abs/1704.01796