Showing 2020Show all

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astro-ph.GA2020★ 49 cited

Physical insights from the spectrum of the radio halo in MACS J0717.5+3745

K. Rajpurohit, G. Brunetti, A. Bonafede +18

We present new LOFAR observations of the massive merging galaxy cluster MACS J0717.5+3745. The cluster hosts the most powerful radio halo known to date. These new observations, in…

astro-ph.GA2020

Thermal equilibrium of an ideal gas in a free-floating box

Scott Tremaine, Bence Kocsis, Abraham Loeb

The equilibrium and fluctuations of an ideal gas in a rigid container are studied by every student of statistical mechanics. Here we study the less well-known case when the box is…

astro-ph.GA2020★ 94 cited

Improving Damped Random Walk parameters for SDSS Stripe 82 Quasars with Pan-STARRS1

Krzysztof Suberlak, Željko Ivezić, Chelsea MacLeod

We use the Panoramic Survey Telescope and Rapid Response System 1 Survey (Pan-STARRS1, PS1) data to extend the Sloan Digital Sky Survey (SDSS) Stripe 82 quasar light curves. Combin…

astro-ph.HE2020★ 26 cited

SN 2017gci: a nearby Type I Superluminous Supernova with a bumpy tail

Achille Fiore, Ting-Wan Chen, Anders Jerkstrand +26

We present and discuss the optical spectro-photometric observations of the nearby (z=0.087) Type I superluminous supernova (SLSN I) SN 2017gci, whose peak K-corrected absolute magn…

astro-ph.IM2020★ 13 cited

Design and development of the SOXS calibration unit

Hanindyo Kuncarayakti, Jani Achren, Sergio Campana +43

SOXS is a new spectrograph for the New Technology Telescope (NTT), optimized for transient and variable objects, covering a wide wavelength range from 350 to 2000 nm. SOXS is equip…

astro-ph.IM2020★ 7 cited

Development status of the SOXS instrument control software

Davide Ricci, Andrea Baruffolo, Bernardo Salasnich +43

SOXS (Son Of X-Shooter) is a forthcoming instrument for ESO-NTT, mainly dedicated to the spectroscopic study of transient events and is currently starting the AIT (Assembly, Integr…

astro-ph.IM2020★ 11 cited

Final design and development status of the acquisition and guiding system for SOXS

A. Brucalassi, G. Pignata, J. A. Araiza Duran +43

SOXS (Son Of X-Shooter) will be the new medium resolution (R~4500 for 1'' slit), high-efficiency, wide band spectrograph for the ESO NTT at La Silla, optimized for classification a…

astro-ph.IM2020

SOXS: Effects on optical performances due to gravity flexures, temperature variations, and subsystems alignment

Ricardo Zanmar Sanchez, Matteo Aliverti, Matteo Munari +43

SOXS (Son Of X-Shooter) is the new medium resolution wide-band spectrograph to be installed at the 3.6m New Technology Telescope (NTT) in La Silla. SOXS will offer simultaneous wav…

astro-ph.HE2020★ 13 cited

Effect of acceleration and escape of energetic particles on spectral steepening at shocks

Federico Fraschetti

Energetic particles spectra at interplanetary shocks often exhibit a power law within a narrow momentum range softening at higher energy. We introduce a transport equation accounti…

gr-qc2020★ 21 cited

Light echos and coherent autocorrelations in a black hole spacetime

Paul M. Chesler, Lindy Blackburn, Sheperd S. Doeleman +4

The Event Horizon Telescope recently produced the first images of a black hole. These images were synthesized by measuring the coherent correlation function of the complex electric…

astro-ph.GA2020★ 6 cited

Peering Into the Extended X-ray Emission on Megaparsec Scale in 3C 187

A. Paggi, F. Massaro, H. A. Pena-Herazo +7

Context. The diffuse X-ray emission surrounding radio galaxies is generally interpreted either as due to inverse Compton scattering of non-thermal radio-emitting electrons on the C…

astro-ph.EP2020★ 26 cited

Detectability of biosignatures on LHS 1140 b

Fabian Wunderlich, Markus Scheucher, John Lee Grenfell +4

Terrestrial extrasolar planets around low-mass stars are prime targets when searching for atmospheric biosignatures with current and near-future telescopes. The habitable-zone Supe…

astro-ph.GA2020★ 49 cited

The KMOS Survey: Investigating the Origin of the Elevated Electron Densities in Star-Forming Galaxies at

Rebecca L. Davies, N. M. Förster Schreiber, R. Genzel +24

We investigate what drives the redshift evolution of the typical electron density () in star-forming galaxies, using a sample of 140 galaxies drawn primarily from KMOS$^{\rm 3…

astro-ph.GA2020★ 27 cited

Gas-phase Elemental abundances in Molecular cloudS (GEMS) III. Unlocking the CS chemistry: the CS+O reaction

N. Bulut, O. Roncero, A. Aguado +36

CS is among the most abundant gas-phase S-bearing molecules in cold dark molecular clouds. It is easily observable with several transitions in the millimeter wavelength range, and…

astro-ph.CO2020★ 1 cited

Observing low elevation sky and the CMB Cold Spot with BICEP3 at the South Pole

J. Kang, P. A. R. Ade, Z. Ahmed +84

BICEP3 is a 520 mm aperture on-axis refracting telescope at the South Pole, which observes the polarization of the cosmic microwave background (CMB) at 95 GHz to search for the B-m…

astro-ph.GA2020★ 8 cited

The First Integral Field Unit Spectroscopic View of Shocked Cluster Galaxies

Andra Stroe, Maryam Hussaini, Bernd Husemann +2

Galaxy clusters grow by merging with other clusters, giving rise to Mpc-wide shock waves that travel at 1000-2500 km/s through the intra-cluster medium. To study the effects of mer…

astro-ph.GA2020★ 34 cited

Molecular hydrogen in IllustrisTNG galaxies: carefully comparing signatures of environment with local CO & SFR data

Adam R. H. Stevens, Claudia del P. Lagos, Luca Cortese +7

We examine how the post-processed content of molecular hydrogen (H) in galaxies from the TNG100 cosmological, hydrodynamic simulation changes with environment at , ass…

astro-ph.GA2020★ 19 cited

Dust, gas, and metal content in star-forming galaxies at revealed with ALMA and Near-IR spectroscopy

Tomoko L. Suzuki, Masato Onodera, Tadayuki Kodama +8

We conducted sub-millimeter observations with the Atacama Large Millimeter/sub-millimeter Array (ALMA) of star-forming galaxies at , whose gas-phase metallicities have be…

astro-ph.GA2020★ 87 cited

Orbital Clustering Identifies the Origins of Galactic Stellar Streams

Ana Bonaca, Rohan P. Naidu, Charlie Conroy +9

The origins of most stellar streams in the Milky Way are unknown. With improved proper motions provided by Gaia EDR3, we show that the orbits of 23 Galactic stellar streams are hig…

physics.atom-ph2020★ 22 cited

Coherent optical creation of a single molecule

Yichao Yu, Kenneth Wang, Jonathan D. Hood +7

We report coherent association of atoms into a single weakly bound NaCs molecule in an optical tweezer through an optical Raman transition. The Raman technique uses a deeply bound…

astro-ph.GA2020★ 21 cited

Continuity of accretion from clumps to Class 0 high-mass protostars in SDC335

A. Avison, G. A. Fuller, N. Peretto +6

The IRDC SDC335.579-0.292 (SDC335) is a massive star-forming cloud found to be globally collapsing towards one of the most massive star forming cores in the Galaxy. SDC335 hosts th…

astro-ph.SR2020★ 11 cited

A spectroscopically confirmed Gaia-selected sample of 318 new young stars within 200 pc

Maruša Žerjal, Adam D. Rains, Michael J. Ireland +7

In the Gaia era, the majority of stars in the Solar neighbourhood have parallaxes and proper motions precisely determined while spectroscopic age indicators are still missing for a…

astro-ph.HE2020★ 32 cited

The Effect of Jet-Ejecta Interaction on the Viewing Angle Dependence of Kilonova Light Curves

Hannah Klion, Paul C. Duffell, Daniel Kasen +1

The merger of two neutron stars produces an outflow of radioactive heavy nuclei. Within a second of merger, the central remnant is expected to also launch a relativistic jet, which…

astro-ph.CO2020★ 82 cited

Dark Energy Survey Year 3 Results: Clustering Redshifts -- Calibration of the Weak Lensing Source Redshift Distributions with redMaGiC and BOSS/eBOSS

M. Gatti, G. Giannini, G. M. Bernstein +94

We present the calibration of the Dark Energy Survey Year 3 (DES Y3) weak lensing source galaxy redshift distributions from clustering measurements. In particular, we cross-…