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An estimation of the Gaia EDR3 parallax bias from stellar clusters and Magellanic Clouds data
Maíz Apellániz, J.
Context. The early-third Gaia data release (EDR3) parallaxes constitute the most detailed and accurate dataset that currently can be used to determine stellar distances in the solar neighborhood. Nevertheless, there is still room for improvement in their calibration and systematic effects can be further reduced in some circumstances.
Aims: Th…
A stellar stream remnant of a globular cluster below the metallicity floor
Mucciarelli, Alessio; Fouesneau, Morgan; Sestito, Federico +23 more
Stellar ejecta gradually enrich the gas out of which subsequent stars form, making the least chemically enriched stellar systems direct fossils of structures formed in the early Universe1. Although a few hundred stars with metal content below 1,000th of the solar iron content are known in the Galaxy2-4, none of them inhabit g…
The effect of returning radiation on relativistic reflection
Reynolds, C. S.; Dauser, T.; Wilms, J. +5 more
We study the effect of returning radiation on the shape of the X-ray reflection spectrum in the case of thin accretion discs. We show that the returning radiation mainly influences the observed reflection spectrum for a large black hole spin (a > 0.9) and a compact primary source of radiation close to the black hole at height h < 5rg
First Results from the JWST Early Release Science Program Q3D: Turbulent Times in the Life of a z 3 Extremely Red Quasar Revealed by NIRSpec IFU
Johnson, Sean D.; Lützgendorf, Nora; Maiolino, Roberto +20 more
Extremely red quasars, with bolometric luminosities exceeding 1047 erg s-1, are a fascinating high-redshift population that is absent in the local universe. They are the best candidates for supermassive black holes accreting at rates at or above the Eddington limit, and they are associated with the most rapid and powerful out…
A high angular resolution view of the PAH emission in Seyfert galaxies using JWST/MRS data
Rigopoulou, D.; García-Burillo, S.; Shimizu, T. +16 more
Polycyclic aromatic hydrocarbons (PAHs) are carbon-based molecules that are ubiquitous in a variety of astrophysical objects and environments. In this work we use JWST/MIRI MRS spectroscopy of three Seyferts to compare their nuclear PAH emission with that of star-forming (SF) regions. This study represents the first of its kind to use sub-arcsecon…
Characterization of Two 2 mm detected Optically Obscured Dusty Star-forming Galaxies
Finkelstein, Steven L.; Casey, Caitlin M.; Kartaltepe, Jeyhan S. +22 more
The 2 mm Mapping Obscuration to Reionization with ALMA (MORA) Survey was designed to detect high-redshift (z ≳ 4), massive, dusty star-forming galaxies (DSFGs). Here we present two likely high-redshift sources, identified in the survey, whose physical characteristics are consistent with a class of optical/near-infrared (OIR)-invisible DSFGs found …
The kinematic properties of Milky Way stellar halo populations
Bovy, Jo; Lane, James M. M.; Mackereth, J. Ted
In the Gaia era, stellar kinematics are extensively used to study Galactic halo stellar populations, to search for halo structures, and to characterize the interface between the halo and hot disc populations. We use distribution function-based models of modern data sets with 6D phase space data to qualitatively describe a variety of kinematic spac…
Asteroids for µ Hz gravitational-wave detection
Rajendran, Surjeet; Graham, Peter W.; Fedderke, Michael A.
A major challenge for gravitational-wave (GW) detection in the µ Hz band is engineering a test mass (TM) with sufficiently low acceleration noise. We propose a GW detection concept using asteroids located in the inner Solar System as TMs. Our main purpose is to evaluate the acceleration noise of asteroids in the µ Hz band. We show that…
APERO: A PipelinE to Reduce Observations-Demonstration with SPIRou
Bouchy, François; Vandal, Thomas; Doyon, René +14 more
With the maturation of near-infrared high-resolution spectroscopy, especially when used for precision radial velocity, data reduction has faced unprecedented challenges in terms of how one goes from raw data to calibrated, extracted, and corrected data with required precisions of thousandths of a pixel. Here we present A PipelinE to Reduce Observa…
BASS. XXI. The Data Release 2 Overview
Lamperti, Isabella; Cenko, S. Bradley; Schawinski, Kevin +24 more
The BAT AGN Spectroscopic Survey (BASS) is designed to provide a highly complete census of the key physical parameters of the supermassive black holes (SMBHs) that power local active galactic nuclei (AGNs) (z ≲ 0.3), including their bolometric luminosity (L bol), black hole (BH) mass (M BH), accretion rates (L bol/…