Results 21 to 30 of about 51,951 (281)

Star Formation Histories of Nearby Elliptical Galaxies. II. Merger Remnant Sample [PDF]

, 2006
This work presents high $S/N$ spectroscopic observations of a sample of six suspected merger remnants, selected primarily on the basis of H{\sc i} tidal debris detections.
Heckman T., Justin H. Howell, Kauffmann G., Larson R., Nagashima M., Prugniel P., van Driel W.   +6 more
core   +3 more sources

Pre-Processing and Post-Processing in Group-Cluster Mergers [PDF]

, 2013
Galaxies in clusters are more likely to be of early type and to have lower star formation rates than galaxies in the field. Recent observations and simulations suggest that cluster galaxies may be `pre-processed' by group or filament environments and ...
Ricker, Paul M., Vijayaraghavan, Rukmani
core   +1 more source

Decoding Galactic Merger Histories

Galaxies, 2017
Galaxy mergers are expected to influence galaxy properties, yet measurements of individual merger histories are lacking. Models predict that merger histories can be measured using stellar halos and that these halos can be quantified using observations of
Eric F. Bell, Antonela Monachesi, Richard D’Souza, Benjamin Harmsen, Roelof S. de Jong, David Radburn-Smith, Jeremy Bailin, Benne W. Holwerda   +7 more
doaj   +1 more source

The Merger Rate of Massive Galaxies [PDF]

The Astrophysical Journal, 2006
We calculate the projected two point correlation function for samples of luminous and massive galaxies in the COMBO-17 photometric redshift survey, focusing particularly on the amplitude of the correlation function at small projected radii and exploring the constraints such measurements can place on the galaxy merger rate.
Bell, E., Phleps, S., Somerville, R., Wolf, C., Borch, A., Meisenheimer, K.   +5 more
openaire   +4 more sources

Targeted decrease of portal hepatic pressure gradient improves ascites control after TIPS

Hepatology, EarlyView., 2022
The river diagram demonstrates that after transjugular intrahepatic portosystemic shunt insertion (TIPS) the majority of patients without ascites and 50% of the patients with ascites detectable at ultrasound, show the best response in the long term follow‐up.
Alexander Queck, Louise Schwierz, Wenyi Gu, Philip G. Ferstl, Christian Jansen, Frank E. Uschner, Michael Praktiknjo, Johannes Chang, Maximilian J. Brol, Filippo Schepis, Manuela Merli, Christian P. Strassburg, Jennifer Lehmann, Carsten Meyer, Jonel Trebicka   +14 more
wiley   +1 more source

Janus kinase 2 inhibition by pacritinib as potential therapeutic target for liver fibrosis

Hepatology, EarlyView., 2022
Diagram of the activation of the profibrotic and procontractile Janus kinase 2 (JAK2)/Ras homolog family member A/Rho‐kinase pathway and the inhibition of phosphorylated JAK2 by pacritinib to inhibit hepatic stellate cell activity. Abstract Background and Aims Janus kinase 2 (JAK2) signaling is increased in human and experimental liver fibrosis with ...
Sandra Torres, Cristina Ortiz, Nadine Bachtler, Wenyi Gu, Leon D. Grünewald, Nico Kraus, Robert Schierwagen, Christoph Hieber, Caroline Meier, Olaf Tyc, Maximilian Joseph Brol, Frank Erhard Uschner, Bart Nijmeijer, Christoph Welsch, Marie‐Luise Berres, Carmen Garcia‐Ruiz, Jose Carlos Fernandez‐Checa, Christian Trautwein, Thomas J. Vogl, Stefan Zeuzem, Jonel Trebicka, Sabine Klein   +21 more
wiley   +1 more source

The Chandra view of galaxy mergers [PDF]

Monthly Notices of the Royal Astronomical Society, 2007
From a Chandra survey of nine interacting galaxy systems the evolution of X-ray emission during the merger process has been investigated. It is found that the X-ray luminosity peaks ~300 Myr before nuclear coalescence, and then dips, even though we know that rapid and increasing activity is still taking place at this time.
Brassington, N. J., Ponman, T. J., Read, A. M.   +2 more
openaire   +3 more sources

Growing the first galaxies’ merger trees

Monthly Notices of the Royal Astronomical Society, 2023
ABSTRACT Modelling the growth histories of specific galaxies often involves generating the entire population of objects that arise in a given cosmology and selecting systems with appropriate properties. This approach is highly inefficient when targeting rare systems such as the extremely luminous high-redshift galaxy candidates detected ...
Ethan O Nadler, Andrew Benson, Trey Driskell, Xiaolong Du, Vera Gluscevic   +4 more
openaire   +2 more sources

Dark Matter Halo Mergers I: Dependence on Environment & Redshift Evolution [PDF]

, 2009
This paper presents a study of the specific merger rate as a function of group membership, local environment, and redshift in a very large, $500h^{-1} Mpc$, cosmological N-body simulation, the \textit{Millennium Simulation}.
A. Tasitsiomi, Alexander, Berlind, Blanton, Borys, Conroy, Ferrarese, Gebhardt, Gerssen, Gottlöber, Hayashi, Hopkins, J. A. Hester, Jogee, Kauffmann, Klypin, Komossa, Kravtsov, Kravtsov, Lacey, Lemson, Maccio, Magorrian, Makino, Mamon, Marconi, Naab, Norton, Serber, Spergel, Springel, Tasitsiomi, Tasitsiomi, Thacker, Tremaine, Wechsler, Wetzel, White, Wyithe, Wyithe, Yang, Yoachim   +41 more
core   +2 more sources

Galaxy mergers and gravitational lens statistics [PDF]

The Astrophysical Journal, 1994
We investigate the impact of hierarchical galaxy merging on the statistics of gravitational lensing of distant sources. Since no definite theoretical predictions for the merging history of luminous galaxies exist, we adopt a parametrized prescription, which allows us to adjust the expected number of pieces comprising a typical present galaxy at z=0.65.
Rix, Hans-Walter, Maoz, Dan, Turner, Edwin L., Fukugita, Masataka   +3 more
openaire   +2 more sources