Showing 2020Show all

664 papers · 1 filter

astro-ph.SR2020★ 5 cited

Observing the changing surface structures of the active K giant sigma Gem with SONG

H. Korhonen, R. M. Roettenbacher, S. Gu +6

Aims: We aim to study the spot evolution and differential rotation in the magnetically active cool K-type giant star sigma Gem from broadband photometry and continuous spectroscopi…

astro-ph.IM2020★ 3 cited

Towards a physical understanding of the thermal background in large ground-based telescopes

Leonard Burtscher, Ioannis Politopoulos, Sergio Fernández-Acosta +11

Ground-based thermal-infrared observations have a unique scientific potential, but are also extremely challenging due to the need to accurately subtract the high thermal background…

astro-ph.GA2020★ 84 cited

Dust polarized emission observations of NGC 6334; BISTRO reveals the details of the complex but organized magnetic field structure of the high-mass star-forming hub-filament network

D. Arzoumanian, R. Furuya, T. Hasegawa +145

[Abridged] Filaments and hubs have received special attention recently thanks to studies showing their role in star formation. While the column density and velocity structures of b…

astro-ph.IM2020★ 9 cited

SOXS End-to-End simulator: development and applications for pipeline design

M. Genoni, M. Landoni, G. Li Causi +44

We present the development of the End-to-End simulator for the SOXS instrument at the ESO-NTT 3.5-m telescope. SOXS will be a spectroscopic facility, made by two arms high efficien…

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.GA2020★ 35 cited

The VMC Survey -- XL. Three-dimensional structure of the Small Magellanic Cloud as derived from red clump stars

B. L. Tatton, J. Th. van Loon, M. -R. L. Cioni +12

Galaxy interactions distort the distribution of baryonic matter and can affect star formation. The nearby Magellanic Clouds are a prime example of an ongoing galaxy interaction pro…

astro-ph.GA2020★ 21 cited

The delay time distribution of supernovae from integral-field spectroscopy of nearby galaxies

Asier Castrillo, Yago Ascasibar, Lluís Galbany +6

Constraining the delay-time distribution (DTD) of different supernova (SN) types can shed light on the timescales of galaxy chemical enrichment and feedback processes affecting gal…

astro-ph.SR2020★ 133 cited

Stellar chromospheric activity of 1,674 FGK stars from the AMBRE-HARPS sample I. A catalogue of homogeneous chromospheric activity

J. Gomes da Silva, N. C. Santos, V. Adibekyan +9

We present a catalogue of homogeneous determined chromospheric emission (CE), stellar atmospheric parameters and ages for 1,674 FGK main sequence (MS), subgiant, and giant stars. T…

astro-ph.IM2020

Turbulence nowcast for the Cerro Paranal and Cerro Armazones observatory sites

Julien Milli, Tomás Rojas, Benjamin Courtney-Barrer +4

Optical turbulence affects significantly the quality of ground-based astronomical observations. An accurate and reliable forecast of optical turbulence can help to optimise the sch…

astro-ph.HE2020★ 48 cited

Accretion disc cooling and narrow absorption lines in the tidal disruption event AT 2019dsg

G. Cannizzaro, T. Wevers, P. G. Jonker +23

We present the results of a large multi-wavelength follow-up campaign of the Tidal Disruption Event (TDE) \dsg, focusing on low to high resolution optical spectroscopy, X-ray, and…

astro-ph.SR2020★ 39 cited

Luminous Red Nova AT 2019zhd, a new merger in M 31

A. Pastorello, M. Fraser, G. Valerin +20

We present the follow-up campaign of the luminous red nova (LRN) AT~2019zhd, the third event of this class observed in M 31. The object was followed by several sky surveys for abou…

astro-ph.SR2020★ 45 cited

TESS observations of Cepheid stars: first light results

E. Plachy, A. Pál, A. Bódi +33

We present the first analysis of Cepheid stars observed by the TESS space mission in Sectors 1 to 5. Our sample consists of 25 pulsators: ten fundamental mode, three overtone and t…

astro-ph.GA2020★ 24 cited

The Arecibo Ultra-Deep Survey

Hongwei Xi, Lister Staveley-Smith, Bi-Qing For +5

The Arecibo Ultra Deep Survey (AUDS) is a blind HI survey aimed at detecting galaxies beyond the local Universe in the 21-cm emission line of neutral hydrogen (HI). The Arecibo …

astro-ph.EP2020★ 81 cited

Understanding the Impacts of Stellar Companions on Planet Formation and Evolution: A Survey of Stellar and Planetary Companions within 25 pc

Lea A. Hirsch, Lee Rosenthal, Benjamin J. Fulton +10

We explore the impact of outer stellar companions on the occurrence rate of giant planets detected with radial velocities. We searched for stellar and planetary companions to a vol…

astro-ph.SR2020★ 20 cited

A comparison between X-shooter spectra and PHOENIX models across the HR-diagram

A. Lançon, A. Gonneau, K. Verro +14

The path towards robust near-infrared extensions of stellar population models involves the confrontation between empirical and synthetic stellar spectral libraries across the wavel…

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.CO2020★ 78 cited

The Abell 3391/95 galaxy cluster system: A 15 Mpc intergalactic medium emission filament, a warm gas bridge, infalling matter clumps, and (re-) accelerated plasma discovered by combining SRG/eROSITA data with ASKAP/EMU and DECam data

T. H. Reiprich, A. Veronica, F. Pacaud +44

We used dedicated SRG/eROSITA X-ray, ASKAP/EMU radio, and DECam optical observations of a 15 sq.deg region around the interacting galaxy cluster system A3391/95 to study the warm-h…

astro-ph.IM2020★ 11 cited

Design, pointing control, and on-sky performance of the mid-infrared vortex coronagraph for the VLT/NEAR experiment

A. -L. Maire, E. Huby, O. Absil +16

Vortex coronagraphs have been shown to be a promising avenue for high-contrast imaging in the close-in environment of stars at thermal infrared (IR) wavelengths. They are included…

astro-ph.GA2020★ 45 cited

ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT) V: Sample, overview, and demography of disk molecular emission

Antonio Garufi, Linda Podio, Claudio Codella +9

We present an overview of the ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT), a campaign devoted to the characterization of the molecular emission from partly em…

astro-ph.GA2020★ 42 cited

SUPER IV. CO(J=3-2) properties of active galactic nucleus hosts at cosmic noon revealed by ALMA

C. Circosta, V. Mainieri, I. Lamperti +23

Feedback from AGN is thought to be key in shaping the life cycle of their host galaxies by regulating star-formation activity. Therefore, to understand the impact of AGN on star fo…

astro-ph.SR2020

Planet formation in intermediate-separation binary systems

O. Panić, T. J. Haworth, M. G. Petr-Gotzens +13

We report the first characterisation of the individual discs in the intermediate separation binary systems KK Oph and HD 144668 at millimetre wavelengths. In both systems the circu…

astro-ph.GA2020★ 12 cited

Optical emission lines in the most massive galaxies: morphology, kinematics and ionisation properties

I. Pagotto, D. Krajnović, M. den Brok +5

To better characterize the upper end of the galaxy stellar mass range, the MUSE Most Massive Galaxies (M3G) Survey targeted the most massive galaxies (M M) foun…

astro-ph.EP2020★ 17 cited

High resolution observations of molecular emission lines toward the CI Tau proto-planetary disc: planet-carved gaps or shadowing?

Giovanni P. Rosotti, John D. Ilee, Stefano Facchini +4

Recent observations have revealed that most proto-planetary discs show a pattern of bright rings and dark gaps. However, most of the high-resolution observations have focused only…

astro-ph.SR2020★ 34 cited

Dynamical stellar masses of pre-main sequence stars in Lupus and Taurus obtained with ALMA surveys in comparison with stellar evolutionary models

Teresa A. M. Braun, Hsi-Wei Yen, Patrick M. Koch +3

We analysed archival molecular line data of pre-main sequence (PMS) stars in the Lupus and Taurus star-forming regions obtained with ALMA surveys with an integration time of a few…