Results 11 to 20 of about 437 (157)
Detector system challenges of the wide‐field spectroscopic survey telescope (WST)
Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023 Abstract The wide‐field spectroscopic survey telescope (WST) is proposed to become the next large optical/near infrared facility for the European southern observatory (ESO) once the extremely large telescope (ELT) has become operational. While the latter is optimized for unprecedented sensitivity and adaptive‐optics assisted image quality over a small ...
Roland Bacon +4 more
wiley +1 more source
The Circumgalactic Medium [PDF]
Annual Review of Astronomy and Astrophysics, 2017 The gas surrounding galaxies outside their disks or interstellar medium and inside their virial radii is known as the circumgalactic medium (CGM). In recent years this component of galaxies has assumed an important role in our understanding of galaxy evolution owing to rapid advances in observational access to this diffuse, nearly invisible material ...
Tumlinson, Jason +2 more
openaire +2 more sources
Project AMIGA: The Circumgalactic Medium of Andromeda* [PDF]
The Astrophysical Journal, 2020 Abstract Project AMIGA (Absorption Maps In the Gas of Andromeda) is a survey of the circumgalactic medium (CGM) of Andromeda (M31, ≃ 300 kpc) along 43 QSO sightlines at impact parameters 25 ≤ R ≤ 569 kpc (25 at R ≲
Nicolas Lehner +24 more
openaire +3 more sources
The Launching of Cold Clouds by Galaxy Outflows. V. The Role of Anisotropic Thermal Conduction
The Astrophysical Journal, 2023 Motivated by observations of multiphase galaxy outflows, we explore the impact of isotropic and anisotropic electron thermal conduction on the evolution of radiatively cooled, cold clouds embedded in hot, magnetized winds.
Marcus Brüggen +2 more
doaj +1 more source
Chemical abundances in the dwarf galaxy NGC 4163 based on the nebular and auroral emission lines
Astronomische 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
Enriching the hot circumgalactic medium [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 Models of galaxy formation in a CDM universe predict that massive galaxies are surrounded by a hot, quasi-hydrostatic circumgalactic corona of slowly cooling gas, predominantly accreted from the IGM. This prediction is borne out by the cosmological hydrodynamical simulations of Crain et al., which reproduce scaling relations between the X-ray and ...
Crain, R.A. +4 more
openaire +6 more sources
The Spatial and Emission Properties of the Large [O iii] Emission Nebula Near M31
The Astrophysical Journal, 2023 Drechsler et al. reported the unexpected discovery of a 1.°5 long [O iii ] emission nebula 1.°2 southeast of the M31 nucleus. Here we present additional images of this large emission arc, called the Strottner–Drechsler–Sainty Object (SDSO), along with ...
Robert A. Fesen +10 more
doaj +1 more source
Absorption-based circumgalactic medium line emission estimates
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT Motivated by integral field units (IFUs) on large ground telescopes and proposals for ultraviolet-sensitive space telescopes to probe circumgalactic medium (CGM) emission, we survey the most promising emission lines and how such observations can inform our understanding of the CGM and its relation to galaxy formation. We tie our
Daniel R Piacitelli +3 more
openaire +2 more sources
Constraining magnetic fields in the circumgalactic medium [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACTWe study the properties of magnetic fields in the circumgalactic medium (CGM) of z < 1 galaxies by correlating Faraday rotation measures (RMs) of ∼1000 high-redshift radio sources with the foreground galaxy number density estimated from the DESI Legacy Imaging Surveys.
Ting-Wen Lan 藍鼎文 +1 more
openaire +2 more sources
The circumgalactic medium of high-redshift galaxies [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2014 Abstract We study the properties of the circumgalactic medium (CGM) of high-z galaxies in the metal enrichment simulations presented in Pallottini et al. At z = 4, we find that the simulated CGM gas density profiles are self-similar, once scaled with the virial radius of the parent dark matter halo.
PALLOTTINI, ANDREA +2 more
openaire +2 more sources