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A gravitational-wave standard siren measurement of the Hubble constant
TLDR
A measurement of the Hubble constant is reported that combines the distance to the source inferred purely from the gravitational-wave signal with the recession velocity inferred from measurements of the redshift using the electromagnetic data.
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The long bar as seen by the VVV survey - I. Colour–magnitude diagrams
Context. The VISTA Variable Survey (VVV) is able to map the Galaxy at l≤ 0 ◦ with an unpaired depth (at least 3 mag deeper than 2MASS), opening new possibilities for studying the inner structure of…
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Observational constraints on the optical and near-infrared emission from the neutron star–black hole binary merger candidate S190814bv
Context. Gravitational wave (GW) astronomy has rapidly reached maturity, becoming a fundamental observing window for modern astrophysics. The coalescences of a few tens of black hole (BH) binaries…
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The long bar as seen by the VVV Survey - II. Star counts
Context. There is still some debate about the presence and the morphological properties of the long bar in the inner Galaxy. Aims. We investigate the morphological properties of the long Galactic bar…
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The VISTA ZYJHKs photometric system: Calibration from 2MASS
In this paper we describe the routine photometric calibration of data taken with the VIRCAM instrument on the ESO VISTA telescope. The broadband ZYJHKs data are directly calibrated from 2MASS point…
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A new survey of cool supergiants in the Magellanic Clouds
In this study, we conduct a pilot program aimed at the red supergiant population of the Magellanic Clouds. We intend to extend the current known sample to the unexplored low end of the brightness…
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VdBH 222: a starburst cluster in the inner Milky Way
Context. It has been suggested that the compact open cluster VdBH 222 is a young massive distant object. Aims. We set out to characterise VdBH 222 using a comprehensive set of multi-wavelength…
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A third cluster of red supergiants in the vicinity of the massive cluster RSGC3
This research is partially supported by the Spanish Ministerio de Ciencia e Innovacion (MCINN) under AYA2010-21697-C05-5 and the Consolider-Ingenio 2010 programme grant CSD2006-00070: First Science…
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Metallicity distribution of red giants in the Inner Galaxy from near infrared spectra
Context. The existence in the Milky Way of either a long thin bar with a half length of 4.5 kpc and a position angle of around 45° with respect to the Sun-Galactic centre line or a bulge+bar complex,…
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NGC 6067: a young and massive open cluster with high metallicity
This research is partially supported by the Spanish Government Ministerio de Economia y Competitividad under grants BES 2013-065384 and AYA2015-68012-C2-2-P (MINECO/FEDER). AM acknowledges support…
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