Results 31 to 40 of about 77,751 (271)

The hard X-ray view of bright infrared galaxies

, 2009
Aims. The synthesis of the cosmic X-ray background (CXB) requires a large population of Compton-thick active galactic nuclei that have not been detected so far.
Akylas, Armus, Barger, Bassani, Courvoisier, Dadina, de Rosa, Franceschini, Genzel, Gilli, Gondoin, González-Martín, Grimm, Guainazzi, Kawakatu, Kennicutt, La Franca, Lebrun, Lynden-Bell, Matt, Mushotzky, N. Cabral, Paltani, R. Walter, Risaliti, Risaliti, Sanders, Schmidt, Setti, Terashima, Tozzi, Tueller, Ubertini, Vega, Vignati, Walter, Watabe, Wilkes, Wilkes, Zdziarski   +39 more
core   +1 more source

The Ubiquity and Dual Nature of Ultra Compact Dwarfs [PDF]

, 2011
We present the discovery of several Ultra Compact Dwarfs (UCDs) located in field/group environments. Examination of these objects, plus literature objects, confirms the existence of two distinct formation channels for UCDs.
Kannappan, Sheila J., Norris, Mark A.
core   +3 more sources

Origin of very high energy emission in galaxy clusters

EPJ Web of Conferences, 2017
The Perseus cluster of galaxies with the central galaxy NGC 1275 is ideally suitable for studying both the physics of relativistic jets from Active Galactic Nuclei and for revealing the feedback role of the central galaxy.
Sinitsyna V.G., Sinitsyna V.Y.
doaj   +2 more sources

NUclei of GAlaxies [PDF]

Astronomy & Astrophysics, 2007
Accepted for publication by A&A; 13 pages and 6 figures; Fig.5 & 6 have been ...
Krips, M., Eckart, Andreas, Krichbaum, Thomas P., Pott, Jörg-Uwe, Léon, Sylvie, Neri, Roberto, García-Burillo, Santiago, Combes, Françoise, Boone, Frédéric, Baker, Andrew J., Tacconi, L. J., Schinnerer, Eva, Hunt, Leslie K.   +12 more
openaire   +5 more sources

Shock heating by FR I radio sources in galaxy clusters

, 2007
Feedback by active galactic nuclei (AGN) is frequently invoked to explain the cut-off of the galaxy luminosity function at the bright end and the absence of cooling flows in galaxy clusters. Meanwhile, there are recent observations of shock fronts around
Brueggen, M., Heinz, S., Roediger, E., Ruszkowski, M., Simionescu, A.   +4 more
core   +1 more source

Revealing components of the galaxy population through nonparametric techniques [PDF]

, 2008
The distributions of galaxy properties vary with environment, and are often multimodal, suggesting that the galaxy population may be a combination of multiple components.
Adelman-McCarthy, Alex L. Rojas, Baldry, Baldry, Baldwin, Ball, Balogh, Balogh, Barnes, Beisbart, Blanton, Bower, Cherkassky, Christopher J. Miller, Christopher R. Genovese, Conselice, Croton, Dressler, Driver, Ellis, Giuricin, Gómez, Hogg, Kass, Kauffmann, Kewley, Kewley, Koenker, Larry Wasserman, Lewis, McLachlan, Miller, Moustakas, Nakamura, Park, Peter E. Freeman, Richstone, Robert C. Nichol, Schwarz, Silk, Springel, Stasińska, Steven P. Bamford, Strateva, Tremonti, Weinmann, Weisberg, Wolf, Yu, Zehavi   +49 more
core   +2 more sources

TeV Diffuse Emission From the Inner Galaxy

Frontiers in Astronomy and Space Sciences, 2018
The TeV diffuse emission from the Galactic plane is produced by multi TeV electrons and nuclei interacting with radiation fields and ambient gas, respectively. Measurements of the TeV diffuse emission help constrain CR origin and transport properties. We
Amid Nayerhoda, Francisco Salesa Greus, Sabrina Casanova   +2 more
doaj   +1 more source

HIDDEN ACTIVE GALACTIC NUCLEI IN EARLY-TYPE GALAXIES [PDF]

The Astrophysical Journal, 2016
ABSTRACT We present a stacking analysis of the complete sample of early-type galaxies (ETGs) in the Chandra COSMOS (C-COSMOS) survey, to explore the nature of the X-ray luminosity in the redshift and stellar luminosity ranges and
Alessandro Paggi, Giuseppina Fabbiano, Francesca Civano, Silvia Pellegrini, Martin Elvis, Dong-Woo Kim   +5 more
openaire   +2 more sources

Substituent‐Based Modulation of Self‐Assembly and Immunogenicity of Amphipathic Peptides

Advanced Science, EarlyView.
This study systematically investigates how positional and subtle changes, such as substituents on the phenyl ring attached to short amphipathic peptides, influence their self‐assembly, fibril morphology, and immunogenic responses. ABSTRACT Self‐assembled peptide‐based biomaterials provide versatile platforms for biomedical uses, featuring customizable ...
Anirban Das, Ushasi Pramanik, Elise M. Brown, Chih‐Yun Liu, Huan Gong, Jonathan Fascetti, Mark Gibson, Samuel Stealey, Silviya P. Zustiak, Cory Berkland, Piyoosh Sharma, Meredith E. Jackrel, Mark A. White, Jai S. Rudra   +13 more
wiley   +1 more source

Compact Nuclei in Galaxies at Moderate Redshift:II. Their Nature and Implications for the AGN Luminosity Function

, 1998
This study explores the space density and properties of active galaxies to z=0.8. We have investigated the frequency and nature of unresolved nuclei in galaxies at moderate redshift as indicators of nuclear activity such as Active Galactic Nuclei (AGN ...
Avni Y., Boyle B. J., Boyle B. J., Chen L.-W., Cheney J. E., Cheng F. Z., Hasinger G., Kalinkov M., Kavan Ratnatunga, Kotilainen J. K., Richard E. Griffiths, Richard F. Green, Tresse L., Vicki L. Sarajedini   +13 more
core   +1 more source