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357 papers · 1 filter

astro-ph.CO2018★ 14 cited

CMB lensing bi-spectrum: assessing analytical predictions against full-sky lensing simulations

Toshiya Namikawa, Benjamin Bose, François R. Bouchet +2

Cosmic microwave background (CMB) lensing is an integrated effect whose kernel is greater than half the peak value in the range . Measuring this effect offers a powerful too…

gr-qc2018★ 6 cited

Analytic Approximations in GR and Gravitational Waves

Luc Blanchet

Analytic approximation methods in general relativity play a very important role when analyzing the gravitational wave signals recently discovered by the LIGO and Virgo detectors. I…

astro-ph.GA2018★ 39 cited

Spatial distribution of stellar mass and star formation activity at 0.2<z<1.2 across and along the Main Sequence

Laura Morselli, Paola Popesso, Anna Cibinel +5

High-resolution multi-wavelength photometry is crucial to explore the spatial distribution of star formation in galaxies and understand how these evolve. To this aim, in this paper…

gr-qc2018★ 2 cited

Seeing relativity -- II. Revisiting and visualizing the Reissner-Nordström metric

Alain Riazuelo

In this paper we study some features of the Reissner-Nordström metric both from an analytic and a visual point of view. We perform an accurate ray tracing and study of null geodesi…

astro-ph.IM2018★ 3 cited

Geometrical Constraints of Observing Very High Energy Earth-Skimming Neutrinos from Space

Claire Guépin, Frédéric Sarazin, John Krizmanic +3

The detection of very-high-energy (VHE) neutrinos ( PeV) is a challenge that future generations of experiments are being designed and constructed to address. One pro…

astro-ph.CO2018★ 2 cited

The Sterile-Active Neutrino Flavor Model: the Imprint of Dark Matter on the Electron Neutrino Spectra

Ilídio Lopes

Contact interactions between sterile neutrinos and dark matter particles in a hidden sector have been suggested as a good solution to simultaneously resolve the dark matter problem…

astro-ph.GA2018★ 16 cited

The link between brightest cluster galaxy properties and large scale extensions of 38 DAFT/FADA and CLASH clusters in the redshift range 0.2<z<0.9

F. Durret, Y. Tarricq, I. Márquez +2

In the context of large scale structure formation, clusters of galaxies are located at the nodes of the cosmic web, and continue to accrete galaxies and groups along filaments. The…

gr-qc2018★ 37 cited

Flux-balance equations for linear momentum and center-of-mass position of self-gravitating post-Newtonian systems

Luc Blanchet, Guillaume Faye

We revisit the problem of flux-balance equations for isolated post-Newtonian matter systems due to the emission of gravitational waves. In particular we show by a local derivation…

astro-ph.GA2018★ 19 cited

Instabilities in disc galaxies: from noise to grooves to spirals

Sven De Rijcke, Jean-Baptiste Fouvry, Christophe Pichon

Using the linearized Boltzmann equation, we investigate how grooves carved in the phase space of a half-mass Mestel disc can trigger the vigorous growth of two-armed spiral eigenmo…

astro-ph.GA2018★ 24 cited

The ISM Properties and Gas Kinematics of a Redshift 3 Massive Dusty Star-forming Galaxy

T. K. Daisy Leung, Dominik A. Riechers, Andrew J. Baker +9

We present CO(J= 1-0; 3-2; 5-4; 10-9) and 1.2-kpc resolution [CII] line observations of the dusty star-forming galaxy (SFG) HXMM05 -- carried out with the Karl G. Jansky Very Large…

astro-ph.GA2018★ 37 cited

Simultaneous analysis of SDSS spectra and GALEX photometry with STARLIGHT: Method and early results

Ariel Werle, Roberto Cid Fernandes, Natalia Vale Asari +4

We combine data from the Sloan Digital Sky Survey and the Galaxy Evolution Explorer to simultaneously analyze optical spectra and ultraviolet photometry of 231643 galaxies with the…

astro-ph.EP2018★ 206 cited

Hubble PanCET: An extended upper atmosphere of neutral hydrogen around the warm Neptune GJ 3470 b

V. Bourrier, A. Lecavelier des Etangs, D. Ehrenreich +16

GJ 3470b is a warm Neptune transiting an M-dwarf star at the edge of the evaporation desert. It offers the possibility of investigating how low-mass, close-in exoplanets evolve und…

astro-ph.CO2018★ 42 cited

Dark Energy Survey Year 1 results: Validation of weak lensing cluster member contamination estimates from P(z) decomposition

T. N. Varga, J. DeRose, D. Gruen +68

Weak lensing source galaxy catalogs used in estimating the masses of galaxy clusters can be heavily contaminated by cluster members, prohibiting accurate mass calibration. In this…

astro-ph.EP2018★ 47 cited

Listening to the gravitational wave sound of circumbinary exoplanets

Nicola Tamanini, Camilla Danielski

To date more than 3500 exoplanets have been discovered orbiting a large variety of stars. Due to the sensitivity limits of the currently used detection techniques, these planets po…

astro-ph.GA2018★ 45 cited

Planck's Dusty GEMS. VII. Atomic carbon and molecular gas in dusty starburst galaxies at z=2 to 4

N. Nesvadba, R. Canameras, R. Kneissl +5

The bright [CI] 1-0 and [CI] 2-1 lines of atomic carbon are becoming more and more widely employed tracers of the cold neutral gas in high-redshift galaxies. Here we present observ…

astro-ph.GA2018★ 42 cited

The Extremely Luminous Quasar Survey in the Sloan Digital Sky Survey footprint. III. The South Galactic Cap Sample and the Quasar Luminosity Function at Cosmic Noon

Jan-Torge Schindler, Xiaohui Fan, Ian D. McGreer +11

We have designed the Extremely Luminous Quasar Survey (ELQS) to provide a highly complete census of unobscured UV-bright quasars during the cosmic noon, . Here we report…

astro-ph.IM2018★ 356 cited

The Fifteenth Data Release of the Sloan Digital Sky Surveys: First Release of MaNGA Derived Quantities, Data Visualization Tools and Stellar Library

D. S. Aguado, Romina Ahumada, Andres Almeida +230

Twenty years have passed since first light for the Sloan Digital Sky Survey (SDSS). Here, we release data taken by the fourth phase of SDSS (SDSS-IV) across its first three years o…

astro-ph.EP2018★ 243 cited

Spectrally resolved helium absorption from the extended atmosphere of a warm Neptune-mass exoplanet

R. Allart, V. Bourrier, C. Lovis +7

Stellar heating causes atmospheres of close-in exoplanets to expand and escape. These extended atmospheres are difficult to observe because their main spectral signature - neutral…

astro-ph.GA2018★ 86 cited

Chandra centres for COSMOS X-ray galaxy groups: Differences in stellar properties between central dominant and offset brightest group galaxies

Ghassem Gozaliasl, Alexis Finoguenov, Masayuki Tanaka +24

We present the results of a search for galaxy clusters and groups in the square degree of the COSMOS field using all available X-ray observations from the XMM-Newton and Ch…

astro-ph.HE2018★ 48 cited

Multimessenger Implications of AT2018cow: High-Energy Cosmic Ray and Neutrino Emissions from Magnetar-Powered Super-Luminous Transients

Ke Fang, Brian D. Metzger, Kohta Murase +2

Newly-born, rapidly-spinning magnetars have been invoked as the power sources of super-luminous transients, including the class of "fast-luminous optical transients" (FBOTs). The e…

astro-ph.CO2018★ 75 cited

A New RASS Galaxy Cluster Catalog with Low Contamination Extending to in the DES Overlap Region

Matthias Klein, Sebastian Grandis, Joseph Mohr +2

We present the MARD-Y3 catalog of between 1086 and 2171 galaxy clusters (52\% and 65\% new) produced using multi-component matched filter (MCMF) followup in 5000\,deg of DES-Y3…

astro-ph.GA2018★ 220 cited

The Milky Way has no in-situ halo other than the heated thick disc. Composition of the stellar halo and age-dating the last significant merger with Gaia DR2 and APOGEE

P. Di Matteo, M. Haywood, M. D. Lehnert +5

Previous studies based on the analysis of Gaia DR2 data have revealed that accreted stars, possibly originating from a single progenitor satellite, are a significant component of t…

astro-ph.GA2018★ 13 cited

Evidence for shock-heated gas in the Taffy Galaxies and Bridge from Optical Emission-Line IFU spectroscopy

Bhavin A. Joshi, Philip N. Appleton, Guillermo A. Blanc +7

We present optical IFU observations of the Taffy system (UGC 12914/15); named for the radio emission that stretches between the two galaxies. Given that these gas rich galaxies are…

astro-ph.CO2018★ 6 cited

Tomographic weak lensing bispectrum: a thorough analysis towards the next generation of galaxy surveys

Matteo Rizzato, Karim Benabed, Francis Bernardeau +1

We address key points for an efficient implementation of likelihood codes for modern weak lensing large-scale structure surveys. Specifically, we focus on the joint weak lensing co…