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Related papers: LATIS: The Ly$\alpha$ Tomography IMACS Survey

200 papers

We present near-infrared observations of 42 gravitationally lensed galaxies obtained in the framework of the KMOS Lensed Emission Lines and VElocity Review (KLEVER) Survey, a program aimed at investigating the spatially resolved properties…

We present new high-precision measurements of the opacity of the intergalactic and circumgalactic medium (IGM, CGM) at <z>=2.4. Using Voigt profile fits to the full Lyman alpha and Lyman beta forests in 15 high-resolution high-S/N spectra…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Gwen C. Rudie , Charles C. Steidel , Alice E. Shapley , Max Pettini

Galaxy formation depends critically on the physical state of gas in the circumgalactic medium (CGM) and its interface with the intergalactic medium (IGM), determined by the complex interplay between inflows from the IGM and outflows from…

Astrophysics of Galaxies · Physics 2021-11-16 Daniele Sorini , José Oñorbe , Joseph F. Hennawi , Zarija Lukić

We use medium- and high-resolution spectroscopy of close pairs of quasars to analyze the circumgalactic medium (CGM) surrounding 32 damped Ly$\alpha$ absorption systems (DLAs). The primary quasar sightline in each pair probes an intervening…

Very recently a new inversion method has been developped to analyze the intergalactic medium seen in absorption in quasar spectra (the so-called Lyman-alpha forest). This method is applied to recover the temperature of the gas and the…

We present new simulations of Lyman-$\alpha$ (Ly$\alpha$) intensity maps that include Ly$\alpha$ radiative transfer in the intergalactic medium (IGM) and all significant sources of Ly$\alpha$ photons. The sources considered include…

Astrophysics of Galaxies · Physics 2025-08-29 Abigail E. Ambrose , Eli Visbal , Mihir Kulkarni , Matthew McQuinn

[abridged] We describe LyMAS (Ly-alpha Mass Association Scheme), a method of predicting clustering statistics in the Ly-alpha forest on large scales from moderate resolution simulations of the dark matter distribution, with calibration from…

Cosmology and Nongalactic Astrophysics · Physics 2014-03-05 Sébastien Peirani , David H. Weinberg , Stéphane Colombi , Jérémy Blaizot , Yohan Dubois , Christophe Pichon

Simulations of the formation of large-scale structure predict that dark matter, low density highly ionized gas, and galaxies form 10 40 Mpc scale filaments. These structure are easily recognized in the distribution of galaxies, but have not…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-15 Bart P. Wakker , Audra K. Hernandez , David French , Tae-Sun Kim , Benjamin D. Oppenheimer , Blair D. Savage

We present analysis of two- and three-point correlation functions of Ly$\alpha$ forest (at $2\le z\le 2.5$) using X-Shooter spectra of three background quasar triplets probing transverse separations of 0.5-1.6 pMpc. We present statistics…

Cosmology and Nongalactic Astrophysics · Physics 2019-10-16 Soumak Maitra , Raghunathan Srianand , Patrick Petitjean , Hadi Rahmani , Prakash Gaikwad , Tirthankar Roy Choudhury , Christophe Pichon

Studies of cosmological objects should take into account their positions within the cosmic web of large-scale structure. Unfortunately, the cosmic web has only been extensively mapped at low-redshifts ($z<1$), using galaxy redshifts as…

Cosmology and Nongalactic Astrophysics · Physics 2016-11-08 Khee-Gan Lee , Martin White

We have performed a detailed statistical study of the evolution of structure in a photoionized intergalactic medium (IGM) using analytical simulations to extend the calculation into the mildly non-linear density regime found to prevail at z…

Astrophysics · Physics 2008-11-26 HongGuang Bi , Arthur F. Davidsen

Measurements of the Ly$\alpha$ forest based on large numbers of quasar spectra from sky surveys such as SDSS/eBOSS accurately probe the distribution of matter on small scales and thus provide important constraints on several ingredients of…

Cosmology and Nongalactic Astrophysics · Physics 2021-04-22 Michael Walther , Eric Armengaud , Corentin Ravoux , Nathalie Palanque-Delabrouille , Christophe Yèche , Zarija Lukić

We describe the results of a deep survey for Ly alpha emission line galaxies at z~3.1, carried out with the multislit imaging spectroscopy (MSIS) technique, with the FORS2 spectrograph on VLT-UT1. We discuss the criteria used to select the…

Cosmology and Nongalactic Astrophysics · Physics 2010-10-01 G. Ventimiglia , M. Arnaboldi , O. Gerhard

We present the first results from a survey of the relative spatial distributions of galaxies, intergalactic neutral hydrogen, and intergalactic metals at high redshift. We obtained high-resolution spectra of 8 bright QSOs at 3.1<z<4.1 and…

Astrophysics · Physics 2009-11-07 K. L. Adelberger , C. C. Steidel , A. E. Shapley , M. Pettini

Characterizing the mechanisms and galaxy properties conducive to the emission and escape of ionizing (LyC) emission is necessary to accurately model the Epoch of Reionization, and identify the sources that powered it. The Ly$\alpha$ and…

With a primary goal of conducting precision weak lensing measurements from space, the COSMOS survey has imaged the largest contiguous area observed by the Hubble Space Telescope (HST) to date using the Advanced Camera for Surveys (ACS).…

The epoch of reionization (6 < z < 10) marks the period in our universe when the first large galaxies grew to fruition, and began to affect the universe around them. Massive stars, and potentially accreting supermassive black holes, filled…

At a distance of 50 kpc and with a dark matter mass of $\sim10^{10}$ M$_{\odot}$, the Large Magellanic Cloud (LMC) is a natural target for indirect dark matter searches. We use five years of data from the Fermi Large Area Telescope (LAT)…

High Energy Astrophysical Phenomena · Physics 2015-05-27 Matthew R. Buckley , Eric Charles , Jennifer M. Gaskins , Alyson M. Brooks , Alex Drlica-Wagner , Pierrick Martin , Geng Zhao