Results 11 to 20 of about 511 (139)
Triggering active galactic nuclei in galaxy clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 We model the triggering of active galactic nuclei (AGN) in galaxy clusters using the semianalytic galaxy formation model SAGE. We prescribe triggering methods based on the ram pressure galaxies experience as they move throughout the intracluster medium, which is hypothesized to trigger star formation and AGN activity.
Madeline A Marshall +5 more
openaire +3 more sources
Astronomy & Astrophysics, 2007 Accepted for publication by A&A; 13 pages and 6 figures; Fig.5 & 6 have been ...
Krips, M. +12 more
openaire +5 more sources
HIDDEN ACTIVE GALACTIC NUCLEI IN EARLY-TYPE GALAXIES [PDF]
The Astrophysical Journal, 2016 ABSTRACT We present a stacking analysis of the complete sample of early-type galaxies (ETGs) in the Chandra COSMOS (C-COSMOS) survey, to explore the nature of the X-ray luminosity in the redshift and stellar luminosity ranges and
Alessandro Paggi +5 more
openaire +2 more sources
Advanced Science, EarlyView.Producing MSCs on rigid culture substrates induces a scar‐making phenotype, jeapordizing therapeutic success. ‘Tissue‐soft’ surfaces prevent MSC fibrogenesis and preserve regenerative traits. An epigenetic network, driven by HOXA11 and SALL1, maintains ‘soft memory’ by keeping chromatin open in relaxed MSCs, promoting anti‐fibrotic programs.
Fereshteh Sadat Younesi +7 more
wiley +1 more source
The Astrophysical Journal, 1992 The nucleus of a galaxy orbits around the mass centroid. Orbital motions appear overstable in numerical experiments started with a galaxy's nucleus at rest atop its mass centroid. The amplitude doubles in 6-10 orbital periods. Orbits precess, nutate, and change their amplitudes, but they keep fairly constant periods.
R. H. Miller, B. F. Smith
openaire +1 more source
The New Double Nuclei Markarian Galaxies [PDF]
Symposium - International Astronomical Union, 1989 In the course of morphological survey of Markarian galaxies on 2.6 m telescope of the Byurakan Observatory four new double nuclei objects were discovered. The results of morphological investigation of these galaxies are given and some parameters of the objects and their nuclei are estimated.
A. R. Petrosian +2 more
openaire +1 more source
Starbursting Nuclei in Old Dwarf Galaxies [PDF]
The Astrophysical Journal Letters, 2020 Abstract Nuclei of early-type dwarf galaxies (dEs) are usually younger than the galaxy main body, and this discrepancy in age has been a puzzle. To explore the origin of young nuclei in dEs, we study a sample of dEs having compact star-forming blobs that are visually similar to dEs’ nuclei but by far bluer.
Sanjaya Paudel, Suk-Jin Yoon
openaire +2 more sources
Advanced Science, EarlyView.A real‐time, non‐contact photoplethysmography (PPG) system based on InAs colloidal quantum dots (CQDs) synthesized via a seedless injection synthesis is demonstrated. The measured oxygen saturation shows considerable agreement with commercial PPG devices.
Beom Kwan Kim +8 more
wiley +1 more source
Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events
Astronomische Nachrichten, EarlyView.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
Astronomische Nachrichten, EarlyView.ABSTRACT The goal of this study is to confirm the feasibility of the use of digitized low dispersive MtWilson Michigan Southern Sky Hα$$ \alpha $$ survey astronomical photographic plates for modern astrophysical research. The detection of highly redshifted objects, such as early galaxies and quasars, is fundamental to understanding the universe's ...
Tauseef Ahmad Zafar +3 more
wiley +1 more source