Showing 2020 · astro-ph.GAShow all

11 papers · 2 filters

astro-ph.GA2020★ 112 cited

Gaia Early Data Release 3: Acceleration of the solar system from Gaia astrometry

Gaia Collaboration, S. A. Klioner, F. Mignard +414

Context. Gaia Early Data Release 3 (Gaia EDR3) provides accurate astrometry for about 1.6 million compact (QSO-like) extragalactic sources, 1.2 million of which have the best-quali…

astro-ph.GA2020★ 219 cited

Gaia Early Data Release 3: Summary of the contents and survey properties

Gaia Collaboration, A. G. A Brown, A. Vallenari +423

We present the early installment of the third Gaia data release, Gaia EDR3, consisting of astrometry and photometry for 1.8 billion sources brighter than magnitude 21, complemented…

astro-ph.GA2020★ 5 cited

Stellar Initial Mass Function over a range of redshifts

Rafeel Riaz, Dominik R. G. Schleicher, Siegfried Vanaverbeke +1

The stellar Initial Mass Function (IMF) seems to be close to universal in the local star-forming regions. However, this quantity of a newborn stellar population responds differentl…

astro-ph.GA2020★ 13 cited

Eta Carinae & the Homunculus: Far Infrared, Sub-millimeter Spectral Lines

T. R. Gull, P. W. Morris, J. H. Black +4

The evolved massive binary star Eta Carinae underwent eruptive mass loss events that formed the complex bi-polar Homunculus nebula harboring tens of solar masses of unusually nitro…

astro-ph.GA2020★ 9 cited

Benfords law in the Gaia universe

Jurjen de Jong, Jos de Bruijne, Joris De Ridder

Benfords law states that for scale- and base-invariant data sets covering a wide dynamic range, the distribution of the first significant digit is biased towards low values. This h…

astro-ph.GA2020★ 17 cited

Empirical completeness assessment of the Gaia DR2, Pan-STARRS 1 and ASAS-SN-II RR Lyrae catalogues

Cecilia Mateu, Berry Holl, Joris de Ridder +1

RR Lyrae stars are an important and widely used tracer of the most ancient populations of our Galaxy, mainly due to their standard candle nature. The availability of large scale su…

astro-ph.GA2020★ 3 cited

Reconstructing EUV spectrum of star forming regions from millimeter recombination lines of HI, HeI, and HeII

Lena Murchikova, Eric J. Murphy, Dariusz C. Lis +9

The extreme ultraviolet (EUV) spectra of distant star-forming regions cannot be probed directly using either ground- or space-based telescopes due to the high cross-section for int…

astro-ph.GA2020★ 8 cited

Do fragmentation and accretion affect the stellar Initial Mass Function?

R. Riaz, D. R. G. Schleicher, S. Vanaverbeke +1

While the stellar Initial Mass Function (IMF) appears to be close to universal within the Milky Way galaxy, it is strongly suspected to be different in the primordial Universe, whe…

astro-ph.GA2020★ 40 cited

The effect of the environment-dependent IMF on the formation and metallicities of stars over the cosmic history

Martyna Chruslinska, Tereza Jerabkova, Gijs Nelemans +1

Recent observational and theoretical studies indicate that the stellar initial mass function (IMF) varies systematically with the environment (star formation rate - SFR, metallicit…

astro-ph.GA2020★ 14 cited

A survey for variable young stars with small telescopes: II -- Mapping a protoplanetary disk with stable structures at 0.15 AU

Jack J. Evitts, Dirk Froebrich, Aleks Scholz +57

The HOYS citizen science project conducts long term, multifilter, high cadence monitoring of large YSO samples with a wide variety of professional and amateur telescopes. We presen…

astro-ph.GA2020★ 8 cited

The VLT-FLAMES Tarantula Survey XXXII. Low-luminosity late O-type stars -- classification, main physical parameters, and silicon abundances

N. Markova, J. Puls, P. L. Dufton +6

Analysis of late O-type stars observed in the Large Magellanic Cloud (LMC) by the VLT-FLAMES Tarantula Survey (VFTS) revealed a discrepancy between the physical properties estimate…