Results 61 to 70 of about 737 (162)

Chemical Evolution of the Universe and its Consequences for Gravitational‐Wave Astrophysics

Annalen der Physik, Volume 536, Issue 2, February 2024.
Population properties of double compact object mergers (especially binary black holes) are sensitive to the metallicity dependent cosmic star formation history. The uncertainty of this quantity cannot be ignored and makes the interpretation of current gravitational wave observations difficult.
Martyna Chruślińska
wiley   +1 more source

Cosmology with Gravitational Waves: A Review

Annalen der Physik, Volume 536, Issue 2, February 2024.
The review gives an overview of the most recent advances in gravitational‐wave (GWs) cosmology. After an in‐depth discussion of methodologies and tools for GW cosmology, it presents the latest results on measurements of standard cosmological parameters from the LIGO, Virgo, and KAGRA detections.
Simone Mastrogiovanni, Christos Karathanasis, Jonathan Gair, Gregory Ashton, Stefano Rinaldi, Hsiang‐Yu Huang, Gergely Dálya   +6 more
wiley   +1 more source

Frequency and properties of bars in cluster and field galaxies at intermediate redshifts [PDF]

, 2009
International audienceWe present a study of large-scale bars in field and cluster environments out to redshifts of ~0.8 using a final sample of 945 moderately inclined disk galaxies drawn from the EDisCS project.
G. Rudnick, Clowe, D., B. Milvang-Jensen, Dalcanton, J., Dalcanton, J. J., Barazza, F., Simard, L., F. D. Barazza, R. Pelló, Clowe, D. I., D. Zaritsky, J. J. Dalcanton, Noll, S., White, S. D. M., L. Simard, Poggianti, B. M., Pelló, R., Saglia, R. P., Barazza, F. D., Rudnick, G., Aragón-Salamanca, A., V. Desai, S. Jogee, R. P. Saglia, B. M. Poggianti, Arag\uf3n-Salamanca, A., Milvang-Jensen, Bo, Milvang-Jensen, B., Zaritsky, D., Barazza...[et al.], F. D., Pell\uf3, R., Poggianti, B., de Lucia, G., Jablonka, P., S. Noll, Saglia, R., Halliday, C., S. D. M. White, P. Jablonka, A. Aragón-Salamanca, Desai, V., Jogee, S., White, S., C. Halliday, D. I. Clowe, G. De Lucia   +45 more
core   +1 more source

New Derivation of Redshift Distance Without Using Power Expansions. II. Additional Redshift Distances, Analyzing the Data of More Quasars, of Some SNIa, of the One Black Hole in Galaxy M87 as Well as a Newer Estimation of H₀

, 2022
In this part of the two-part series of essays, we first derive some equations for further physical redshift distances. We then analyze a catalog with 132,975 quasars, for which both the apparent magnitude m and the redshift z are given, in order to find the today’s value of the parameter β0 of the theory presented.
openaire   +2 more sources

Stratified learning: A general‐purpose statistical method for improved learning under covariate shift

Statistical Analysis and Data Mining: The ASA Data Science Journal, Volume 17, Issue 1, February 2024.
Abstract We propose a simple, statistically principled, and theoretically justified method to improve supervised learning when the training set is not representative, a situation known as covariate shift. We build upon a well‐established methodology in causal inference and show that the effects of covariate shift can be reduced or eliminated by ...
Maximilian Autenrieth, David A. van Dyk, Roberto Trotta, David C. Stenning   +3 more
wiley   +1 more source

A new (2+1)D cluster finding algorithm based on photometric redshifts: large scale structure in the Chandra deep field south [PDF]

, 2006
Aims. We study galaxy clustering and explore the dependence of galaxy properties on the the environment up to a redshift z ? 1, on the basis of a deep multi-band survey in the Chandra Deep Field South. Methods.
M. Castellano, E. Giallongo, TREVESE, Dario, CASTELLANO, MARCO, A. Fontana, GIALLONGO E., FONTANA A, D. Trevese   +7 more
core   +1 more source

The Redshift Distribution and Luminosity Functions of Galaxies in the Hubble Deep Field [PDF]

, 2007
Photometric redshifts have been determined for the galaxies in the Hubble Deep Field. The resulting redshift distribution shows two peaks: one at z ¸ :5 and one at z ¸ 2:5. Luminosity functions derived from the redshifts show strong luminosity evolution
Stephen Gwyn And, Stephen D. J. Gwyn, F. D. A. Hartwick   +2 more
core  

Radio galaxies near the epoch of reionisation [PDF]

, 2019
This thesis explores the theoretical and observational properties of distant massive galaxies that harbour active black holes in their centres and shine brightly at radio wavelengths.
Saxena, A.
core   +1 more source

Correlation functions for pairs and groups of galaxies [PDF]

, 1990
There are many studies on the correlation functions of galaxies, of clusters of galaxies, even of superclusters (e.g., Groth and Peebles 1977; Davies and Peebles 1983; Kalinkov and Kuneva 1985, 1986; Bahcall 1988 and references therein) but not so many ...
Kalinkov, M., Kuneva, I.
core   +1 more source

The line-of-sight towards GRB 030429 at z=2.66:probing the matter at stellar, galactic and intergalactic scales [PDF]

, 2004
Gamma rays: bursts-galaxies: distances and redshifts- galaxies: high-redshift-ISM: dust, extinction-quasars: absorption ...
Jensen, B.L., Jakobsson...[et al.], P., Hjorth, J., Gudmundsson, E.H., Pedersen, K., Møller, P., Kilmartin, P., Fynbo, J.P.U.   +7 more
core   +2 more sources