Results 31 to 40 of about 49,283 (254)

Cluster detection from surface-brightness fluctuations in SDSS data [PDF]

, 2001
Galaxy clusters can be detected as surface brightness enhancements in smoothed optical surveys. This method does not require individual galaxies to be identifiable, and enables clusters to be detected out to surprisingly high redshifts, as recently ...
Aragón-Salamanca, Bahcall, Bahcall, Bartelmann, Brainerd, Carlberg, Carlberg, Carlberg, Dalcanton, Fukugita, Gonzalez, Hoessel, M. Bartelmann, Metcalfe, Navarro, Navarro, Postman, Postman, S. D. M. White, Schneider, van Dokkum, van Dokkum, Woods, Zaritsky, Zaritsky   +24 more
core   +2 more sources

Searching for overlooked TDEs in the 4XMM catalogue

Astronomische Nachrichten, Volume 344, Issue 4, May 2023., 2023
Abstract Tidal disruption events (TDEs) are usually discovered as bright transients, either in the X‐ray or optical/UV band. These events are often characterized by a “super‐soft” emission in the X‐ray band, which has not been observed in any other extragalactic source, with few exceptions (novae and supersoft active galactic nuclei, AGN), which can ...
Andrea Sacchi, Guido Risaliti, Giovanni Miniutti   +2 more
wiley   +1 more source

A Gradual Decline of Star Formation since Cluster Infall: New Kinematic Insights into Environmental Quenching at 0.3 < z < 1.1

The Astrophysical Journal, 2023
The environments where galaxies reside crucially shape their star formation histories. We investigate a large sample of 1626 cluster galaxies located within 105 galaxy clusters spanning a large range in redshift (0.26 < z < 1.13). The galaxy clusters are
Keunho J. Kim, Matthew B. Bayliss, Allison G. Noble, Gourav Khullar, Ethan Cronk, Joshua Roberson, Behzad Ansarinejad, Lindsey E. Bleem, Benjamin Floyd, Sebastian Grandis, Guillaume Mahler, Michael A. McDonald, Christian L. Reichardt, Alexandro Saro, Keren Sharon, Taweewat Somboonpanyakul, Veronica Strazzullo   +16 more
doaj   +1 more source

The build-up of the colour-magnitude relation in galaxy clusters since z~0.8 [PDF]

, 2006
Using galaxy clusters from the ESO Distant Cluster Survey, we study how the distribution of galaxies along the colour-magnitude relation has evolved since z~0.8.
Aragon-Salamanca, Alfonso, Clowe, Douglas, De Lucia, Gabriella, Halliday, Claire, Jablonka, Pascale, Milvang-Jensen, Bo, Pello', Roser, Poggianti, Bianca M., Rudnick, Gregory, Saglia, Roberto P., Simard, Luc, von der Linden, Anja, White, Simon D. M., Zaritsky, Dennis   +13 more
core   +3 more sources

Optical signatures of high-redshift galaxy clusters [PDF]

The Astrophysical Journal, 1994
We combine an N-body and gasdynamic simulation of structure formation with an updated population synthesis code to explore the expected optical characteristics of a high-redshift cluster of galaxies. We examine a poor (2 keV) cluster formed in a biased, cold dark matter cosmology and employ simple, but plausible, threshold criteria to convert gas into ...
Evrard, August E., Charlot, S.
openaire   +2 more sources

Winds in ultraluminous X‐ray sources: New challenges

Astronomische Nachrichten, Volume 344, Issue 4, May 2023., 2023
Abstract Ultraluminous X‐ray sources (ULXs) are extreme X‐ray binaries shining above 1039 erg/s, in most cases as a consequence of super‐Eddington accretion onto neutron stars and stellar‐mass black holes accreting above their Eddington limit. This was understood after the discovery of coherent pulsations, cyclotron lines, and powerful winds.
C. Pinto, P. Kosec
wiley   +1 more source

Measurement of redshift dependent cross correlation of HSC clusters and Fermi $\gamma$ rays [PDF]

, 2019
The cross-correlation study of the unresolved $\gamma$-ray background (UGRB) with galaxy clusters has a potential to reveal the nature of the UGRB. In this paper, we perform a cross-correlation analysis between $\gamma$-ray data by the Fermi Large Area ...
Hashimoto, Daiki, Horiuchi, Shunsaku, Macias, Oscar, Nishizawa, Atsushi J., Oguri, Masamune, Shirasaki, Masato, Tashiro, Hiroyuki   +6 more
core   +2 more sources

A Large-scale Kinematic Study of Molecular Gas in High-z Cluster Galaxies: Evidence for High Levels of Kinematic Asymmetry

The Astrophysical Journal, 2023
We investigate the resolved kinematics of the molecular gas, as traced by the Atacama Large Millimeter/submillimeter Array in CO (2−1), of 25 cluster member galaxies across three different clusters at a redshift of z ∼ 1.6.
W. J. Cramer, A. G. Noble, K. Massingill, J. Cairns, D. L. Clements, M. C. Cooper, R. Demarco, J. Matharu, M. McDonald, A. Muzzin, J. Nantais, G. Rudnick, H. Übler, E. van Kampen, T. M. A. Webb, G. Wilson, H. K. C. Yee   +16 more
doaj   +1 more source

Mapping the intracluster medium temperature in the era of NIKA2 and MUSTANG-2 [PDF]

EPJ Web of Conferences, 2022
We present preliminary results from an on-going program that aims at mapping the intracluster medium (ICM) temperature of high redshift galaxy clusters from the MaDCoWS sample using a joint analysis of shallow X-ray data obtained by Chandra and high ...
Ruppin F., Adam R., Ade P., Ajeddig H., André P., Artis E., Aussel H., Beelen A., Benoît A., Berta S., Bing L., Bourrion O., Brodwin M., Calvo M., Catalano A., Decker B., De Petris M., Désert F.-X., Doyle S., Driessen E. F. C., Eisenhardt P. R. M., Gomez A., Gonzalez A. H., Goupy J., Kéruzoré F., Kramer C., Ladjelate B., Lagache G., Leclercq S., Lestrade J.-F., Macías-Pérez J.-F., Maury A., Mauskopf P., Mayet F., McDonald M., Monfardini A., Moravec E., Muñoz-Echeverría M., Perotto L., Pisano G., Ponthieu N., Revéret V., Rigby A. J., Ritacco A., Romero C., Roussel H., Schuster K., Shu S., Sievers A., Stanford S.A., Stern D., Tucker C., Zylka R.   +52 more
doaj   +1 more source

Tracing the Total Stellar Mass and Star Formation of High-redshift Protoclusters

The Astrophysical Journal, 2023
As the progenitors of present-day galaxy clusters, protoclusters are excellent laboratories to study galaxy evolution. Since existing observations of protoclusters are limited to the detected constituent galaxies at UV and/or infrared wavelengths, the ...
Roxana Popescu, Alexandra Pope, Kyoung-Soo Lee, Stacey Alberts, Yi-Kuan Chiang, Sowon Lee, Mark Brodwin, Jed McKinney, Vandana Ramakrishnan   +8 more
doaj   +1 more source