Search Publications
The Complexity of the Cetus Stream Unveiled from the Fusion of STREAMFINDER and StarGO
Huang, Yang; Chang, Jiang; Sestito, Federico +16 more
We combine the power of two stream-searching tools, STREAMFINDER and StarGO applied to the Gaia EDR3 data, to detect stellar debris belonging to the Cetus stream system that forms a complex, nearly polar structure around the Milky Way. In this work, we find the southern extensions of the northern Cetus stream as the Palca stream and a new southern…
X-ray spectroscopic survey of highly accreting AGN
Bianchi, S.; Vignali, C.; Piconcelli, E. +14 more
Improving our understanding of the nuclear properties of high-Eddington-ratio (λEdd) active galactic nuclei (AGN) is necessary since at this regime the radiation pressure is expected to affect the structure and efficiency of the accretion disc-corona system. This may cause departures from the typical nuclear properties of low-λEdd<…
Physics of ULIRGs with MUSE and ALMA: The PUMA project. IV. No tight relation between cold molecular outflow rates and AGN luminosities
Rigopoulou, D.; Colina, L.; van der Werf, P. +11 more
We study molecular outflows in a sample of 25 nearby (z < 0.17, d < 750 Mpc) ultra-luminous infrared galaxy (ULIRG) systems (38 individual nuclei) as part of the Physics of ULIRGs with MUSE and ALMA (PUMA) survey, using ∼400 pc (0.1-1.0″ beam FWHM) resolution ALMA CO(2-1) observations. We used a spectro-astrometry analysis to identify high-v…
INTEGRAL/IBIS 17-yr hard X-ray all-sky survey
Tsygankov, Sergey S.; Lutovinov, Alexander A.; Krivonos, Roman A. +3 more
The International Gamma-Ray Astrophysics Laboratory (INTEGRAL), launched in 2002, continues its successful work in observing the sky at energies E > 20 keV. The legacy of the mission already includes a large number of discovered or previously poorly studied hard X-ray sources. The growing INTEGRAL archive allows one to conduct an all-sky survey…
Spectroscopic evolution of very massive stars at Z = 1/2.5 Z⊙
Martins, F.; Palacios, A.
Context. Stars with masses in excess of 100 M⊙ are observed in the Local Universe, but they remain rare objects. Because of the shape of the mass function, they are expected to be present only in the most massive and youngest clusters. They may thus be formed in number in highly star-forming galaxies.
Aims: Very massive stars (VMSs…
Observation-based modelling of the energetic storm particle event of 14 July 2012
Lario, D.; Vainio, R.; Poedts, S. +6 more
Aims: We model the energetic storm particle (ESP) event of 14 July 2012 using the energetic particle acceleration and transport model named `PArticle Radiation Asset Directed at Interplanetary Space Exploration' (PARADISE), together with the solar wind and coronal mass ejection (CME) model named `EUropean Heliospheric FORcasting Information A…
A Speed Bump: SN 2021aefx Shows that Doppler Shift Alone Can Explain Early Excess Blue Flux in Some Type Ia Supernovae
Suntzeff, N. B.; Galbany, L.; Brown, P. J. +17 more
We present early-time photometric and spectroscopic observations of the Type Ia supernova (SN Ia) 2021aefx. The early-time u-band light curve shows an excess flux when compared to normal SNe Ia. We suggest that the early excess blue flux may be due to a rapid change in spectral velocity in the first few days post explosion, produced by the emissio…
Radio and far-IR emission associated with a massive star-forming galaxy candidate at z ≃ 6.8: a radio-loud AGN in the reionization era?
Fan, Xiaohui; Stark, Daniel P.; Endsley, Ryan +7 more
We report the identification of radio (0.144-3 GHz) and mid-, far-infrared, and sub-mm (24-850µm) emission at the position of one of 41 UV-bright ($\mathrm{M_{\mathrm{UV}}}^{ }\lesssim -21.25$) z ≃ 6.6-6.9 Lyman-break galaxy candidates in the 1.5 deg2 COSMOS field. This source, COS-87259, exhibits a sharp flux discontinuity (facto…
The Cosmic Ultraviolet Baryon Survey (CUBS) V: on the thermodynamic properties of the cool circumgalactic medium at z ≲ 1
Faucher-Giguère, Claude-André; Johnson, Sean D.; Zahedy, Fakhri S. +11 more
This paper presents a systematic study of the photoionization and thermodynamic properties of the cool circumgalactic medium (CGM) as traced by rest-frame ultraviolet absorption lines around 26 galaxies at redshift z ≲ 1. The study utilizes both high-quality far-ultraviolet and optical spectra of background QSOs and deep galaxy redshift surveys to…
Galaxy luminosity function pipeline for cosmology and astrophysics
Muñoz, Julian B.; Sabti, Nashwan; Blas, Diego
Observations of high-redshift galaxies have provided us with a rich tool to study the physics at play during the epoch of reionization. The luminosity function (LF) of these objects is an indirect tracer of the complex processes that govern galaxy formation, including those of the first dark-matter structures. In this work, we present an extensive…