Results 121 to 130 of about 375,984 (375)

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.
Hans-Walter Rix, Edwin L. Turner, Dan Maoz, Masataka Fukugita   +3 more
openaire   +4 more sources

Orbital Parameters of Merging Dark Matter Halos

, 2003
In order to specify cosmologically motivated initial conditions for major galaxy mergers (mass ratios $\leq$ 4:1) that are supposed to explain the formation of elliptical galaxies we study the orbital parameters of major mergers of cold dark matter halos
A. Burkert, Barnes, Barnes, Bender, Bender, Bendo, Hernquist, Hernquist, Hernquist, Kauffmann, Lemson, Maller, Naab, Naab, Negroponte, Porciani, S. Khochfar, Toomre, Tormen, Vitvitska   +19 more
core   +3 more sources

The significant contribution of minor mergers to the cosmic star formation budget [PDF]

, 2013
We estimate an empirical lower limit for the fraction of cosmic star formation that is triggered by minor mergers in the local Universe. Splitting the star formation budget by galaxy morphology, we find that early-type galaxies (ETGs) host ~14 per cent ...
Kaviraj, S.
core   +2 more sources

Early in‐hospital treatment of acute heart failure. Part 2 of the international expert opinion series on AHF management

ESC Heart Failure, EarlyView.
This state‐of‐the‐art review outlines a practical, evidence‐based framework for early acute heart failure management to address critical gaps in current guidance and improve early treatment outcomes. Key components include early identification of co‐existing conditions, bedside haemodynamic profiling, a structured diagnostic approach incorporating both
Anika S. Naidu, Andrew P. Ambrosy, Gad Cotter, Edimar A. Bocchi, Javed Butler, Ovidiu Chioncel, Beth Davison, Anastase Dzudie, Yonathan Freund, Marat Fudim, Sivadasanpillai Harikrishnan, Ivna G. Cunha, Alexandre Mebazaa, Robert J. Mentz, Òscar Miró, Siti E. Nauli, Mateo Pagnesi, Naoki Sato, Gianluigi Savarese, Karen Sliwa‐Hahnle, Yuhui Zhang, Jingmin Zhou, Jan Biegus   +22 more
wiley   +1 more source

Apparent Effect of Dust Extinction on the Observed Outflow Velocity of Ionized Gas in Galaxy Mergers

The Astrophysical Journal
In this study, we examine photoionization outflows during the late stages of galaxy mergers, with a specific focus on the relation between the observed velocity of outflowing gas and the apparent effects of dust extinction.
Naomichi Yutani, Yoshiki Toba, Keiichi Wada   +2 more
doaj   +1 more source

Event Rate of Fast Radio Bursts from Binary Neutron Star Mergers

The Astrophysical Journal, 2023
It is proposed that a one-off fast radio burst (FRB) with periodic structure may be produced during the inspiral phase of a binary neutron star (BNS) merger. In this paper, we study the event rate of such kind of FRB.
Zhi-Lin Chen, Rui-Chong Hu, Da-Bin Lin, En-Wei Liang   +3 more
doaj   +1 more source

In the wake of dark giants: new signatures of dark matter self-interactions in equal-mass mergers of galaxy clusters [PDF]

, 2016
Author(s): Kim, SY; Peter, AHG; Wittman, D | Abstract: © 2017 The Authors. Merging galaxy clusters have been touted as one of the best probes for constraining selfinteracting darkmatter, but fewsimulations exist to back up this claim.
Stacy Y. Kim, A. Peter, D. Wittman
semanticscholar   +1 more source

Sersic properties of disc galaxy mergers [PDF]

Monthly Notices of the Royal Astronomical Society, 2006
Sersic parameters characterising the density profiles of remnants formed in collision-less disc galaxy mergers are obtained; no bulge is included in our simulations. For the luminous component we find that the Sersic index is n ~ (1.5,5.3) with ~ 3 +/- 1 and an effective radius of R_e ~ (1.6,12.9) kpc with ~ 5 +/- 3 kpc.
Hector Aceves, Héctor Velázquez, Fidel Cruz   +2 more
openaire   +3 more sources

From Discs to Bulges: effect of mergers on the morphology of galaxies [PDF]

, 2015
We study the effect of mergers on the morphology of galaxies by means of the simulated merger tree approach first proposed by Moster et al. This method combines N-body cosmological simulations and semi-analytic techniques to extract realistic initial ...
Fontanot, Fabio, Kannan, Rahul, Karman, Wouter, Maccio', Andrea V., Moster, Benjamin P., Somerville, Rachel S.   +5 more
core   +3 more sources

Integrated trajectories of systolic and diastolic function differentially associate with risk for heart failure with preserved and reduced ejection fraction and proteomic profiles

European Journal of Heart Failure, EarlyView.
Graphical overview of derivation and testing of multiparametric trajectories of cardiac function. This study identified six trajectories of LV systolic and diastolic function from mid‐ to late‐life. Predicted trajectory from single echocardiogram identified four trajectories at differential risk for HFpEF and HFrEF.
Anne Marie Reimer Jensen, James C. Ross, Victoria Arthur, Michael E. Hall, Kunihiro Matsushita, Brandon Lennep, Pamela L. Lutsey, Tor Biering‐Sørensen, Amil M. Shah   +8 more
wiley   +1 more source