Search Publications
Constraining the baryon abundance with the kinematic Sunyaev-Zel'dovich effect: Projected-field detection using P l a n c k , W M A P , and u n W I S E
Ferraro, Simone; Hill, J. Colin; Kusiak, Aleksandra +2 more
The kinematic Sunyaev-Zel'dovich (kSZ) effect—the Doppler boosting of Cosmic Microwave Background (CMB) photons scattering off free electrons with nonzero line-of-sight velocity—is an excellent probe of the distribution of baryons in the Universe. In this paper, we measure the kSZ effect due to ionized gas traced by infrared-selected galaxies from…
CARMENES detection of the Ca II infrared triplet and possible evidence of He I in the atmosphere of WASP-76b
Sánchez-López, A.; Snellen, I. A. G.; López-Puertas, M. +25 more
Ultra-hot Jupiters are highly irradiated gas giants with equilibrium temperatures typically higher than 2000 K. Atmospheric studies of these planets have shown that their transmission spectra are rich in metal lines, with some of these metals being ionised due to the extreme temperatures. Here, we use two transit observations of WASP-76b obtained …
Discovery of Beryllium in White Dwarfs Polluted by Planetesimal Accretion
Weinberger, Alycia J.; Zuckerman, B.; Blouin, Simon +5 more
The element beryllium is detected for the first time in white dwarf stars. This discovery in the spectra of two helium-atmosphere white dwarfs was made possible only because of the remarkable overabundance of Be relative to all other elements, heavier than He, observed in these stars. The measured Be abundances, relative to chondritic, are by far …
The COS Absorption Survey of Baryon Harbors: unveiling the physical conditions of circumgalactic gas through multiphase Bayesian ionization modelling
Tripp, Todd M.; Prochaska, J. Xavier; Burchett, Joseph N. +4 more
Quasar absorption systems encode a wealth of information about the abundances, ionization structure, and physical conditions in intergalactic and circumgalactic media. Simple (often single-phase) photoionization models are frequently used to decode such data. Using five discrete absorbers from the COS Absorption Survey of Baryon Harbors (CASBaH) t…
The Strength and Structure of the Magnetic Field in the Galactic Outflow of Messier 82
Lopez-Rodriguez, Enrique; Guerra, Jordan A.; Asgari-Targhi, Mahboubeh +1 more
Galactic outflows driven by starbursts can modify the galactic magnetic fields and drive them away from the galactic planes. Here, we quantify how these fields may magnetize the intergalactic medium (IGM). We estimate the strength and structure of the fields in the starburst galaxy M82 using thermal polarized emission observations from the Stratos…
On the radial abundance gradients of nitrogen and oxygen in the inner Galactic disc
Méndez-Delgado, J. E.; Arellano-Córdova, K. Z.; García-Rojas, J. +1 more
We present optical spectra of nine Galactic H II regions observed with the 10.4 m Gran Telescopio Canarias telescope and located at Galactocentric distances (RG) from 4 to 8 kpc. The distances of the objects have been revised using Gaia DR2 parallaxes. We determine the electron temperature for all the nebulae, which allows a precise com…
Forever young white dwarfs: When stellar ageing stops
Córsico, Alejandro H.; Rebassa-Mansergas, Alberto; Althaus, Leandro G. +5 more
White dwarf stars are the most common end point of stellar evolution. The ultramassive white dwarfs are of special interest as they are related to type Ia supernovae explosions, merger events, and fast radio bursts. Ultramassive white dwarfs are expected to harbour oxygen-neon (ONe) cores as a result of single standard stellar evolution. However, …
Introducing piXedfit: A Spectral Energy Distribution Fitting Code Designed for Resolved Sources
Wu, Po-Feng; Lin, Yen-Ting; Abdurro'uf +1 more
We present piXedfit, pixelized spectral energy distribution (SED) fitting, a Python package that provides tools for analyzing spatially resolved properties of galaxies using multiband imaging data alone or in combination with integral field spectroscopy (IFS) data. It has six modules that can handle all tasks in the spatially resolved SED fitting.…
XMM-Newton campaign on the ultraluminous X-ray source NGC 247 ULX-1: outflows
Fabian, A. C.; Pinto, C.; D'Aì, A. +13 more
Most ultraluminous X-ray sources (ULXs) are believed to be powered by super-Eddington accreting neutron stars and, perhaps, black holes. Above the Eddington rate the disc is expected to thicken and to launch powerful winds through radiation pressure. Winds have been recently discovered in several ULXs. However, it is yet unclear whether the thicke…
The multiwavelength properties of red QSOs: Evidence for dusty winds as the origin of QSO reddening
Alexander, D. M.; Bowler, R. A. A.; Stalevski, M. +11 more
Fundamental differences in the radio properties of red quasars (QSOs), as compared to blue QSOs, have been recently discovered, positioning them as a potential key population in the evolution of galaxies and black holes across cosmic time. To elucidate the nature of these objects, we exploited a rich compilation of broad-band photometry and spectr…