Results 71 to 80 of about 11,157 (237)
Broad-band study of the evolving emission-line properties of galaxies [PDF]
, 2018 This thesis describes a new approach to the study of high-redshift star-formation and its environments that can be applied to large high-redshift surveys.Instead of relying on spectroscopy or narrow-band photometry to study galaxy line emission in detail,
Ferreira, João Pedro de Jesus
core
Green Peas in the Southern Sky: Broadband Color Selection and Spectroscopic Follow-up
The Astrophysical JournalWe present a systematic search for 1696 green pea (GP) galaxy candidates in the southern hemisphere selected from the Dark Energy Survey Data Release 2 and provide preliminary results from spectroscopic follow-up observations of 26 targets chosen among ...
Yejin Jeong +3 more
doaj +1 more source
Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events
Astronomische Nachrichten, Volume 347, Issue 5, June 2026.ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay +4 more
wiley +1 more source
X-ray luminous clusters of galaxies at z > 0.3 [PDF]
, 2003 This thesis presents optical CCD imaging taken as part of the follow-up programme to the Massive Cluster Survey, a ROSAT All-Sky Survey based cluster survey aiming to discover X-ray luminous galaxy clusters at redshifts above 0.3.
Courtney, Nathan James Daniel
core
, 2007 This research was supported by the Spanish Programa Nacional de Astronomía y Astrofísica under grant AYA2003-1676. The authors would like to thank the referee, David Thompson, for insightful comments that improved the paper.Emission-line galaxies are an ...
Zamorano Calvo, Jaime +2 more
core +1 more source
Relativistic Jets in Gamma-Ray-Emitting Narrow-Line Seyfert 1 Galaxies [PDF]
, 2019 Before the launch of the Fermi Gamma-ray Space Telescope satellite only two classes of active galactic nuclei (AGN) were known to generate relativistic jets and thus to emit up to the γ -ray energy range: blazars and radio galaxies, both hosted in giant ...
D'AMMANDO, FILIPPO, Filippo D’Ammando
core +1 more source
Correlation between Hα Emitters and Their Cosmic Web Environment at z ∼ 1
The Astrophysical JournalFuture near-infrared spectroscopic galaxy surveys will target high-redshift emission-line galaxies (ELGs) to test cosmological models. Deriving optimal constraints from ELG clustering hinges on a robust understanding of their environmental dependence ...
Ivan Rapoport +3 more
doaj +1 more source
CLASH: EXTREME EMISSION-LINE GALAXIES AND THEIR IMPLICATION ON SELECTION OF HIGH-REDSHIFT GALAXIES [PDF]
The Astrophysical Journal, 2015 17 pages, 9 figures, 2 tables, Accepted for publication in ...
Xingxing Huang +25 more
openaire +6 more sources
Quantifying the Impact of Relativistic Precession on Tidal Disruption Event Light Curves
Astronomische Nachrichten, Volume 347, Issue 5, June 2026.ABSTRACT The tidal field of a black hole can turn a star into a gas stream whose orbit can precess, especially if the a black hole is rapidly spinning. In this work, we investigate the impact of precession on the light curves of tidal disruption events (TDE).
Diego Calderón +4 more
wiley +1 more source
Hidden No More: Spotlight on Tidal Disruption Events in Active Galactic Nuclei
Astronomische Nachrichten, Volume 347, Issue 5, June 2026.ABSTRACT Tidal disruption events (TDEs) are typically discovered in previously quiescent galaxies. However, earlier studies have revealed a handful of TDEs occurring in pre‐existing active galactic nuclei (AGN). We discuss AT2019aalc, a promising TDE candidate in an AGN, and compare it to similar sources.
Patrik Milán Veres
wiley +1 more source