Reionization with galaxies and active galactic nuclei [PDF]
Monthly notices of the Royal Astronomical Society, 2020 In this work we investigate the properties of the sources that reionized the intergalactic medium (IGM) in the high-redshift Universe. Using a semi-analytical model aimed at reproducing galaxies and black holes in the first ∼1.5 Gyr of the Universe, we
P. Dayal +8 more
semanticscholar +1 more source
Star formation history in barred spiral galaxies – active galactic nucleus feedback [PDF]
, 2017 We present a numerical study of the impact of AGN accretion and feedback on the star formation history of barred disc galaxies. Our goal is to determine whether the effect of feedback is positive (enhanced star formation) or negative (quenched star ...
Fidèle Robichaud +4 more
semanticscholar +1 more source
Gas filaments of the cosmic web located around active galaxies in a protocluster [PDF]
Science, 2019 Glowing filaments of the cosmic web Most gas in the Universe lies in the intergalactic medium, where it forms into sheets and filaments of the cosmic web.
H. Umehata +19 more
semanticscholar +1 more source
Starburst99: Synthesis Models for Galaxies with Active Star Formation [PDF]
, 1999 Starburst99 is a comprehensive set of model predictions for spectrophotometric and related properties of galaxies with active star formation. The models are an improved and extended version of the data set previously published by Leitherer & Heckman.
C. Leitherer +8 more
semanticscholar +1 more source
Emission lines in early-type galaxies: active nuclei or stars? [PDF]
, 2011 We selected 27 244 nearby, red, giant early-type galaxies (RGEs) from the Sloan Digital Sky Survey (SDSS). In a large fraction (53%) of their spectra the [O III]λ5007 emission line is detected, with an equivalent width (EW) distribution strongly ...
A. C. U. D. Torino +3 more
semanticscholar +1 more source
A Multi-Transition HCN and HCO+ Study of 12 Nearby Active Galaxies: Active Galactic Nucleus versus Starburst Environments [PDF]
, 2007 Recent studies have indicated that the HCN-to-CO(J = 1–0) and HCO+-to-HCN(J = 1–0) ratios are significantly different between galaxies with AGN (active galactic nucleus) and SB (starburst) signatures.
M. Krips +6 more
semanticscholar +1 more source
Mid-infrared imaging of active galaxies. Active nuclei and embedded star clusters [PDF]
, 2005 High resolution, mid-infrared (MIR) images of nine nearby active galaxies are presented. The data were obtained with the TIMMI 2 instrument mounted at the ESO 3.6 m telescope using a set of N -band narrow filters.
E. Galliano +4 more
semanticscholar +1 more source
VLBI Imaging of Luminous Infrared Galaxies: Active Galactic Nucleus Cores in Markarian 231, UGC 5101, and NGC 7469 [PDF]
, 2003 We report 18 cm VLBI continuum imaging observations at ~5 mas resolution for UGC 5101, NGC 7469, and Mrk 231, all part of a sample of luminous infrared galaxies that were shown to have strong VLBI radio cores in a previous 18 cm VLBI survey.
C. Lonsdale +3 more
semanticscholar +1 more source
VLA Observations of Ultraluminous IRAS Galaxies: Active Nuclei or Starbursts? [PDF]
, 1995 We employed the Very Large Array (VLA) of the National Radio Astronomy Observatory in C configuration to map 39 ultraluminous IRAS galaxies at 6~cm and 20~cm, at resolutions of ~ 4" and 15", respectively, and 24 sources at 6~cm with in the A ...
T. Crawford +3 more
semanticscholar +1 more source
Galaxy Evolution in the Radio Band: The Role of Star-forming Galaxies and Active Galactic Nuclei [PDF]
, 2017 We investigate the astrophysics of radio-emitting star-forming galaxies and active galactic nuclei (AGNs) and elucidate their statistical properties in the radio band, including luminosity functions, redshift distributions, and number counts at sub-mJy ...
C. Mancuso +8 more
semanticscholar +1 more source