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The Astronomical Journal, 2004 Using H I absorption alone, we attempt to separate H I absorption lines in quasar spectra into two categories; HDLs (Higher Density Lines) and LDLs (Lower Density Lines), and we discuss the difference in their physical properties. We deblend and fit all H I lines with Voigt profiles, and make an unbiased sample of H I lines covering a wide column ...
Misawa, T. +8 more
openaire +2 more sources
Quasar Radiative Feedback May Suppress Galaxy Growth on Intergalactic Scales at z = 6.3
The Astrophysical Journal LettersWe present observational evidence that intense ionizing radiation from a luminous quasar suppresses nebular emission in nearby galaxies on intergalactic scales at z = 6.3.
Yongda Zhu +29 more
doaj +1 more source
Negative and Positive Outflow-Feedback in Nearby (U)LIRGs
Frontiers in Astronomy and Space Sciences, 2017 The starburst-AGN coexistence in local (U)LIRGs makes these galaxies excellent laboratories for the study of stellar and AGN outflows and feedback. Outflows regulate star formation and AGN activity, redistributing gas, dust and metals over large scales ...
Sara Cazzoli
doaj +1 more source
The Astrophysical JournalWe present Chandra and XMM-Newton X-ray observations of the compact group HCG 57, and optical integral field spectroscopy of the interacting galaxy pair HCG 57A/D.
Ewan O’Sullivan +7 more
doaj +1 more source
Thermodynamic Constraints on the Non-Baryonic Dark Matter Gas Composing Galactic Halos
Galaxies, 2020 To explain rotation curves of spiral galaxies through Newtonian orbital models, massive halos of non-baryonic dark matter (NBDM) are commonly invoked. The postulated properties are that NBDM interacts gravitationally with baryonic matter, yet negligibly ...
Anne M. Hofmeister
doaj +1 more source
Compton Scattering of Electrons in the Intergalactic Medium
The Astrophysical JournalThis paper investigates the distribution and implications of cosmic-ray electrons within the intergalactic medium (IGM). Utilizing a synthesis model of the extragalactic background, we evolve the spectrum of Compton-included cosmic rays.
Yuanyuan Yang +2 more
doaj +1 more source
Upper Limits on the Mass of Cool Gas in the Circumgalactic Medium of Dwarf Galaxies
The Astrophysical Journal LettersWe use H i absorption measurements to constrain the amount of cool (≈10 ^4 K), photoionized gas in the circumgalactic medium (CGM) of dwarf galaxies with M _* = 10 ^6.5−9.5 M _⊙ in the nearby Universe ( z
Yakov Faerman +2 more
doaj +1 more source
Impact of Natural Gas Price Decontrol on Gas Supply, Demand and Prices
, 1982 Major analysis completed recently by the gas transmission and distribution industry concludes that available supplies of gas energy will fall into the range of 23-31 trillion cubic feet (Tcf) by the year 2000, as conventional gas production is ...
Schlesinger, B.
core
The Faint Intergalactic Redshifted Emission Balloon and the Cosmic Web Imager: Two Integral Field Spectrographs Designed to Study Emission from the Intergalactic Medium [PDF]
, 2012 Gas in the intergalactic medium serves as the fuel for galaxies. It carries signatures of galactic feedback, including matter and energy outflows.
Matuszewski, Mateusz Konrad
core +1 more source
Unveiling the Galactic Baryon Cycle Process by an Empirical Model
The Astrophysical JournalWe propose an empirical model to describe and constrain the baryon cycle process during galaxy evolution. This model utilizes the evolution of star formation rate, derived from the stellar mass–halo mass relations across different redshifts, and the cold
Yaoxin Chen +4 more
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