Results 31 to 40 of about 5,089,625 (177)
Properties of the Hii Regions Derived Using Integral Field Spectroscopy
Advances in Astronomy, Volume 2013, Issue 1, 2013., 2013 Here we review some of our more recent results on the observed properties of Hii regions using Integral Field Spectroscopy. In particular, we illustrate the use of this technique to study in detail the ionization conditions across the nebulae for galactic Hii regions (focused on the Orion Nebula) and the statistical study of large samples of ...
Sebastian F. Sánchez +1 more
wiley +1 more source
M94 as a Unique Testbed for Black Hole Mass Estimates and AGN Activity at Low Luminosities
Advances in Astronomy, Volume 2012, Issue 1, 2012., 2012 We discuss the peculiar nature of the nucleus of M94 (NGC 4736) in the context of new measurements of the broad Hα emission from HST‐STIS observations. We show that this component is unambiguously associated with the high‐resolution X‐ray, radio, and variable UV sources detected at the optical nucleus of this galaxy.
Anca Constantin +2 more
wiley +1 more source
Advances in Astronomy, Volume 2010, Issue 1, 2010., 2010 In this tutorial paper we summarize how the star formation (SF) history of a galactic region can be derived from the colour‐magnitude diagram (CMD) of its resolved stars. The procedures to build synthetic CMDs and to exploit them to derive the SF histories (SFHs) are described, as well as the corresponding uncertainties.
Michele Cignoni +2 more
wiley +1 more source
Fading AGN in Post-Starburst Galaxies [PDF]
, 2023 The role of AGN in quenching galaxies and driving the evolution from star-forming to quiescent remains a key question in galaxy evolution. We present evidence from the Mapping Nearby Galaxies at APO (MaNGA) survey for fading AGN activity in 6/93 post ...
Earl, Nicholas +13 more
core +1 more source
Five E+A (post-starburst) galaxies as Brightest Cluster Galaxies [PDF]
Science China Physics, Mechanics and Astronomy, 2012 Brightest Cluster Galaxies (BCGs) are mostly elliptical galaxies and very rarely have prominent star formations. We found that five out of 8,812 BCGs are E+A (i.e., post-starburst) galaxies, having an Hδ absorption line with an equivalent width >2.5 A and no distinct emission lines in [O II] and Hα −.
FengShan Liu +3 more
openaire +1 more source
Rise and fall of post-starburst galaxies in Magneticum Pathfinder [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT Post-starburst (PSB) galaxies belong to a short-lived transition population between star-forming (SF) and quiescent galaxies. Deciphering their heavily discussed evolutionary pathways is paramount to understanding galaxy evolution.
Lotz, M. +3 more
openaire +4 more sources
On Post-starburst Galaxies Dominating Tidal Disruption Events [PDF]
The Astrophysical Journal Letters, 2020 Abstract A starburst induced by a galaxy merger may create a relatively thin central stellar disk at radius ≤100 pc. We calculate the rate of tidal disruption events (TDEs) by the inspiraling secondary supermassive black hole (SMBH) through the disk. With a small enough stellar velocity dispersion (
openaire +2 more sources
After the Fall: The Dust and Gas in E+A Post-starburst Galaxies [PDF]
The Astrophysical Journal, 2018 Abstract The traditional picture of post-starburst galaxies as dust- and gas-poor merger remnants, rapidly transitioning to quiescence, has been recently challenged. Unexpected detections of a significant interstellar medium (ISM) in many post-starburst galaxies raise important questions.
A. Smercina +13 more
openaire +4 more sources
Excess Of Post-Starburst Galaxies In Distant Galaxy Clusters
, 2017 I present a study on the impact of environment on galaxy evolution in distant galaxy clusters between redshifts 0.5 and 1.0. We find candidate galaxy clusters by applying a friends-of-friends algorithm to the deep photometric data of the UKIDSS Ultra-Deep Survey. Through studying the stellar mass functions, we reveal a strong excess of low-mass rapidly-
Socolovsky, Miguel +2 more
openaire +4 more sources
The role of E plus A and post-starburst galaxies - I. Models and model results [PDF]
, 2009 Different compositions of galaxy types in the field in comparison to galaxy clusters as described by the morphology-density relation in the local universe are interpreted as a result of transformation processes from late- to early-type galaxies.
Kotulla, R. +4 more
core +1 more source