Search Publications
The Peculiar Short-duration GRB 200826A and Its Supernova
Covino, S.; D'Avanzo, P.; Della Valle, M. +31 more
Gamma-ray bursts (GRBs) are classified into long and short events. Long GRBs (LGRBs) are associated with the end states of very massive stars, while short GRBs (SGRBs) are linked to the merger of compact objects. GRB 200826A was a peculiar event, because by definition it was an SGRB, with a rest-frame duration of ~0.5 s. However, this event was en…
Constraining the evolution of cataclysmic variables via the masses and accretion rates of their underlying white dwarfs
Reichart, D. E.; Knigge, C.; Gänsicke, B. T. +28 more
We report on the masses (MWD), effective temperatures ($\rm{T_\mathrm{eff}}$), and secular mean accretion rates ($\langle \dot{M} \rangle$) of 43 cataclysmic variable (CV) white dwarfs, 42 of which were obtained from the combined analysis of their Hubble Space Telescope ultraviolet data with the parallaxes provided by the Early Third Da…
High star cluster formation efficiency in the strongly lensed Sunburst Lyman-continuum galaxy at z = 2.37
Zanella, A.; Brammer, G.; Castellano, M. +16 more
We investigate the strongly lensed (µ ≃ ×10 − 100) Lyman continuum (LyC) galaxy, dubbed Sunburst, at z = 2.37, taking advantage of a new accurate model of the lens. A characterization of the intrinsic (delensed) properties of the system yields a size of ≃3 sq. kpc, a luminosity of MUV = −20.3, and a stellar mass of M ≃ 109
A very luminous jet from the disruption of a star by a massive black hole
Kulkarni, S. R.; Kilpatrick, Charles D.; Izzo, Luca +78 more
Tidal disruption events (TDEs) are bursts of electromagnetic energy that are released when supermassive black holes at the centres of galaxies violently disrupt a star that passes too close1. TDEs provide a window through which to study accretion onto supermassive black holes; in some rare cases, this accretion leads to launching of a r…
A dusty compact object bridging galaxies and quasars at cosmic dawn
Marques-Chaves, R.; Magdis, G. E.; Colina, L. +18 more
Understanding how super-massive black holes form and grow in the early Universe has become a major challenge1,2 since it was discovered that luminous quasars existed only 700 million years after the Big Bang3,4. Simulations indicate an evolutionary sequence of dust-reddened quasars emerging from heavily dust-obscured starburs…
ARIADNE: measuring accurate and precise stellar parameters through SED fitting
Jenkins, James S.; Vines, Jose I.
Accurately measuring stellar parameters is a key goal to increase our understanding of the observable Universe. However, current methods are limited by many factors, in particular, the biases and physical assumptions that are the basis for the underlying evolutionary or atmospheric models, those that these methods rely upon. Here, we introduce our…
Three-dimensional extinction maps: Inverting inter-calibrated extinction catalogues
Lallement, R.; Cox, N. L. J.; Vergely, J. L.
Context. Three-dimensional (3D) maps of the extinction density in the Milky Way can be built through the inversion of large catalogues of distance-extinction pairs for individual target stars. Considerable progress is currently achieved in this field through the Gaia mission. Available catalogues are based on various types of photometric or spectr…
The three-year shear catalog of the Subaru Hyper Suprime-Cam SSP Survey
Strauss, Michael A.; Takita, Satoshi; Miyatake, Hironao +15 more
We present the galaxy shear catalog that will be used for the three-year cosmological weak gravitational lensing analyses using data from the Wide layer of the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) Survey. The galaxy shapes are measured from the i-band imaging data acquired from 2014 to 2019 and calibrated with image simulations t…
Has JWST Already Falsified Dark-matter-driven Galaxy Formation?
Kroupa, Pavel; Haslbauer, Moritz; Haghi, Hosein +1 more
The James Webb Space Telescope (JWST) discovered several luminous high-redshift galaxy candidates with stellar masses of M * ≳ 109 M ⊙ at photometric redshifts z phot ≳ 10, which allows to constrain galaxy and structure formation models. For example, Adams et al. identified the candidate ID 1514 with ${\…
CORINOS. I. JWST/MIRI Spectroscopy and Imaging of a Class 0 Protostar IRAS 15398–3359
Lee, Jeong-Eun; Cleeves, L. Ilsedore; Bergner, Jennifer B. +13 more
The origin of complex organic molecules (COMs) in young Class 0 protostars has been one of the major questions in astrochemistry and star formation. While COMs are thought to form on icy dust grains via gas-grain chemistry, observational constraints on their formation pathways have been limited to gas-phase detection. Sensitive mid-infrared spectr…