Search Publications
The Fourth S-PLUS Data Release: 12-filter photometry covering 3000 square degrees in the southern hemisphere
Werle, A.; Mendes de Oliveira, C.; Beers, T. C. +68 more
Context. The Southern Photometric Local Universe Survey (S-PLUS) is a project to map ~9300 sq deg of the sky using twelve bands (seven narrow and five broadbands). Observations are performed with the T80-South telescope, a robotic telescope located at the Cerro Tololo Observatory in Chile. The survey footprint consists of several large contiguous …
The new Herschel/PACS Point Source Catalogue
Altieri, B.; Paladini, R.; Audard, M. +6 more
Context. Herschel operated as an observatory, and therefore it did not cover the whole sky, but still observed ~8% of it. The first version of an overall Herschel/PACS Point Source Catalogue (PSC) was released in 2017. The data are still unique and are very important for research using far-infrared information, especially because no new far-infrar…
Euclid preparation: XLIX. Selecting active galactic nuclei using observed colours
Prandoni, I.; Cimatti, A.; Rodighiero, G. +245 more
The Euclid space mission will cover over 14 000 deg2 with two optical and near-infrared spectro-photometric instruments, and is expected to detect around ten million active galactic nuclei (AGN). This unique data set will make a considerable impact on our understanding of galaxy evolution in general, and AGN in particular. For this work…
Constraints on supermassive black hole binaries from JWST and NANOGrav
Loeb, Abraham; Padmanabhan, Hamsa
We use the recent statistics of dual active galactic nuclei (AGN) in the James Webb Space Telescope (JWST) data at z ∼ 3.4 to address two aspects of the feedback and evolution scenarios of supermassive black hole binaries. We find that the JWST data provide evidence for the members of a binary BH being `lit' at the same time, rather than independe…
Determining stellar accretion rates from Paα and Brβ emission lines with JWST NIRSpec. Accretion of pre-main-sequence stars in NGC 3603
de Marchi, Guido; Brandl, Bernhard; Rogers, Ciarán
In this Letter, we present the first systematic spectroscopic measurements of the near-infrared (NIR) hydrogen recombination lines Paschen alpha (Paαλ = 1.875 µm) and Brackett beta (Brβλ = 2.626 µm), produced by pre-main-sequence (PMS) stars. Such stars include T Tauri and Herbig AeBe stars, located in the massive…
CHEX-MATE: A LOFAR pilot X-ray - radio study on five radio halo clusters
Brunetti, G.; Pointecouteau, E.; Pratt, G. W. +24 more
The connection between the thermal and non-thermal properties in galaxy clusters hosting radio halos seems fairly well established. However, a comprehensive analysis of such a connection has only been done for integrated quantities (e.g. LX − Pradio relation). In recent years, new-generation radio telescopes have enabled the …
Constraining the H2 column densities in the diffuse interstellar medium using dust extinction and H I data
Goldsmith, P. F.; Skalidis, R.; Hopkins, P. F. +1 more
Context. Carbon monoxide (CO) is a poor tracer of H2 in the diffuse interstellar medium (ISM), where most of the carbon is not incorporated into CO molecules, unlike the situation at higher extinctions.
Aims: We present a novel, indirect method for constraining H2 column densities (NH2) without empl…
Mapping radial abundance gradients with Gaia-ESO open clusters: Evidence of recent gas accretion in the Milky Way disk
Randich, S.; Palla, M.; Matteucci, F. +5 more
Context. Recent evidence from spectroscopic surveys points towards the presence of a metal-poor, young stellar population in the low- α, chemically thin disk. In this context, the investigation of the spatial distribution and time evolution of precise, unbiased abundances is fundamental to disentangle the scenarios of formation and evolution of th…
SpectroTranslator: Deep-neural network algorithm for homogenising spectroscopic parameters
Pancino, E.; Kordopatis, G.; Masseron, T. +8 more
Context. In modern Galactic astronomy, stellar spectroscopy plays a pivotal role in complementing large photometric and astrometric surveys and enabling deeper insights to be gained into the chemical evolution and chemo-dynamical mechanisms at play in the Milky Way and its satellites. Nonetheless, the use of different instruments and dedicated pip…
Cosmic evolution of radio-excess active galactic nuclei in quiescent and star-forming galaxies across 0 < z < 4
Kohno, Kotaro; Daddi, Emanuele; Liu, Daizhong +9 more
Context. Radio-excess active galactic nuclei (radio-AGNs) are essential to our understanding of both the physics of black hole (BH) accretion and the interaction between BHs and host galaxies. Recent deep and wide radio continuum surveys have made it possible to study radio-AGNs down to lower luminosities and up to higher redshifts than previous s…