Results 21 to 30 of about 233,270 (276)

Extreme accretion events: TDEs and changing‐look AGN

open access: yesAstronomische Nachrichten, Volume 344, Issue 4, May 2023., 2023
Abstract We present a review of the topics of X‐ray stellar tidal disruption events (TDEs) and changing‐look active galactic nuclei (AGN). Stars approaching a supermassive black hole (SMBH) can be tidally disrupted and accreted. TDEs were first discovered in the X‐ray regime and appear as luminous, giant‐amplitude flares from inactive galaxies.
S. Komossa, D. Grupe
wiley   +1 more source

HST UV Spectroscopy of the Dwarf Starburst Galaxy Pox 186

open access: yesThe Astrophysical Journal, 2023
Studying the galaxies responsible for reionization is often conducted through local reionization-era analogs; however, many of these local analogs are too massive to be representative of the low-mass star-forming galaxies that are thought to play a ...
Noah S. J. Rogers   +6 more
doaj   +1 more source

Starburst Galaxies in Clusters [PDF]

open access: yesAstrophysics and Space Science, 2001
7 pages including 4 figures, PASP LaTeX. Conference Proceedings of The Evolution of Galaxies on Cosmological Timescales, Puerto de la Cruz, Nov 30th.
J. M. Schombert, Karl D. Rakos
openaire   +2 more sources

A new multi‐messenger description of starburst galaxies emission: perspectives for neutrino and gamma‐ray observations

open access: yesAstronomische Nachrichten, Volume 344, Issue 1-2, January-February 2023., 2023
Abstract Star‐forming and starburst galaxies (SBGs), which are well‐known cosmic‐ray (CR) reservoirs, are expected to emit gamma rays and neutrinos predominantly via hadronic collisions. In this work we analyze the 10‐year Fermi‐Low Energy Technique (LAT) spectral energy distributions of 13 nearby galaxies by means of a physical model that accounts for
Antonio Marinelli   +5 more
wiley   +1 more source

Merger Signatures are Common, but not Universal, in Massive, Recently Quenched Galaxies at z ∼ 0.7

open access: yesThe Astrophysical Journal, 2023
We present visual classifications of merger-induced tidal disturbances in 143 M _* ∼ 10 ^11 M _⊙ post-starburst galaxies at z ∼ 0.7 identified in the $\mathrm{SQuIGG}\vec{L}{\rm{E}}$ Sample.
Margaret E. Verrico   +11 more
doaj   +1 more source

The Ages of Starbursts in Post-Starburst Galaxies [PDF]

open access: yesThe Astronomical Journal, 1996
14 pages + 7 figures, uuencoded gzipped postscript.
James A. Rose, Andrew J. Leonardi
openaire   +3 more sources

Chemical abundances in the dwarf galaxy NGC 4163 based on the nebular and auroral emission lines

open access: yesAstronomische Nachrichten, Volume 343, Issue 9-10, November-December 2022., 2022
Abstract We constructed an oxygen abundance map and N/O ratio map of the unusually low excitation dwarf irregular galaxy NGC 4163 based on publicly available spectroscopy obtained by the MaNGA survey. We detected auroral emission line [O II]λλ$$ \lambda \lambda $$7320,7330 which allows us to measure chemical abundance by direct Te$$ {\mathrm{T}}_e ...
I. A. Zinchenko, L. S. Pilyugin
wiley   +1 more source

Rapid Quenching of Galaxies at Cosmic Noon

open access: yesThe Astrophysical Journal, 2023
The existence of massive quiescent galaxies at high redshift seems to require rapid quenching, but it is unclear whether all quiescent galaxies have gone through this phase and what physical mechanisms are involved.
Minjung Park   +8 more
doaj   +1 more source

Cosmic ray transport in starburst galaxies [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2019
Starburst galaxies are efficient γ-ray producers, because their high supernova rates generate copious cosmic ray (CR) protons, and their high gas densities act as thick targets off which these protons can produce neutral pions and thence γ-rays.
M. Krumholz   +5 more
semanticscholar   +1 more source

Extreme submillimetre starburst galaxies [PDF]

open access: yesAstronomy & Astrophysics, 2018
We have used two catalogues, a Herschel catalogue selected at 500 μm (HerMES) and an IRAS catalogue selected at 60 μm (RIFSCz), to contrast the sky at these two wavelengths. Both surveys demonstrate the existence of “extreme” starbursts, with star-formation rates (SFRs) > 5000 M⊙ yr−1.
Dimitra Rigopoulou   +10 more
openaire   +7 more sources

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