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New Physical Insights about Tidal Disruption Events from a Comprehensive Observational Inventory at X-Ray Wavelengths
Ramirez-Ruiz, Enrico; Auchettl, Katie; Guillochon, James
We perform a comprehensive study of the X-ray emission from 70 transient sources that have been classified as tidal disruption events (TDEs) in the literature. We explore the properties of these candidates, using nearly three decades of X-ray observations to quantify their properties and characteristics. We find that the emission from X-ray TDEs i…
A Herschel/PACS Far-infrared Line Emission Survey of Local Luminous Infrared Galaxies
Sanders, D. B.; Surace, J. A.; Inami, H. +20 more
We present an analysis of [O I]63, [O III]88, [N II]122, and [C II]158 far-infrared (FIR) fine-structure line observations obtained with Herschel/PACS, for ∼240 local luminous infrared galaxies (LIRGs) in the Great Observatories All-sky LIRG Survey. We find pronounced declines ("deficits") of line-to-FIR…
The Frontier Fields lens modelling comparison project
Sharon, K.; Diego, J. M.; Zitrin, A. +20 more
Gravitational lensing by clusters of galaxies offers a powerful probe of their structure and mass distribution. Several research groups have developed techniques independently to achieve this goal. While these methods have all provided remarkably high-precision mass maps, particularly with exquisite imaging data from the Hubble Space Telescope (HS…
Strongly baryon-dominated disk galaxies at the peak of galaxy formation ten billion years ago
Lutz, D.; Wuyts, S.; Förster Schreiber, N. M. +28 more
In the cold dark matter cosmology, the baryonic components of galaxies—stars and gas—are thought to be mixed with and embedded in non-baryonic and non-relativistic dark matter, which dominates the total mass of the galaxy and its dark-matter halo. In the local (low-redshift) Universe, the mass of dark matter within a galactic disk increases with d…
Lyman-α spectral properties of five newly discovered Lyman continuum emitters
Schaerer, D.; Thuan, T. X.; Verhamme, A. +4 more
Aims: We have recently reported the discovery of five low redshift Lyman continuum (LyC) emitters (LCEs) with absolute escape fractions fescLyC that range from 6 to 13%, higher than previously found and that more than double the number of low redshift LCEs. We use these observations to test theoretical predictions about …
Echo of interactions in the dark sector
Nunes, Rafael C.; Kumar, Suresh
We investigate the observational constraints on an interacting vacuum energy scenario with two different neutrino schemes (with and without a sterile neutrino) using the most recent data from cosmic microwave background (CMB) temperature and polarization anisotropy, baryon acoustic oscillations (BAO), type Ia supernovae from JLA sample and structu…
The MUSE Hubble Ultra Deep Field Survey. VIII. Extended Lyman-α haloes around high-z star-forming galaxies
Bacon, Roland; Blaizot, Jérémy; Garel, Thibault +17 more
We report the detection of extended Lyα haloes around 145 individual star-forming galaxies at redshifts 3 ≤ z ≤ 6 in the Hubble Ultra Deep Field observed with the Multi-Unit Spectroscopic Explorer (MUSE) at ESO-VLT. Our sample consists of continuum-faint (- 15 ≥ MUV ≥ -22) Lyα emitters (LAEs). Using a 2D, two-component (continuum-like a…
The e-ASTROGAM mission. Exploring the extreme Universe with gamma rays in the MeV - GeV range
Ghisellini, G.; Hanlon, L.; Mereghetti, S. +71 more
e-ASTROGAM (`enhanced ASTROGAM') is a breakthrough Observatory space mission, with a detector composed by a Silicon tracker, a calorimeter, and an anticoincidence system, dedicated to the study of the non-thermal Universe in the photon energy range from 0.3 MeV to 3 GeV - the lower energy limit can be pushed to energies as low as 150 keV, albeit w…
ALMA unveils rings and gaps in the protoplanetary system HD 169142 : signatures of two giant protoplanets
Fedele, D.; Henning, Th.; Miotello, A. +6 more
The protoplanetary system HD 169142 is one of the few cases where a potential candidate protoplanet has recently been detected by direct imaging in the near-infrared. To study the interaction between the protoplanet and the disk itself, observations of the gas and dust surface density structure are needed. This paper reports new ALMA observations …
Cosmological constraints on exotic injection of electromagnetic energy
Lesgourgues, Julien; Poulin, Vivian; Serpico, Pasquale D.
We compute cosmic microwave background (CMB) anisotropy constraints on exotic forms of energy injection in electromagnetic (e.m.) channels over a large range of timescales. We show that these constraints are very powerful around or just after recombination, although CMB keeps some sensitivity e.g. to decaying species with lifetimes as long as 10