Search Publications
Short gamma-ray bursts within 200 Mpc
Troja, E.; Sakamoto, T.; Lien, A. Y. +5 more
We present a systematic search for short-duration gamma-ray bursts (GRBs) in the local Universe based on 14 yr of observations with the Neil Gehrels Swift Observatory. We cross-correlate the GRB positions with the GLADE catalogue of nearby galaxies, and find no event at a distance ≲100 Mpc and four plausible candidates in the range 100 Mpc ≲ D ≲ 2…
Deep transfer learning for star cluster classification: I. application to the PHANGS-HST survey
Kruijssen, J. M. Diederik; Chevance, Mélanie; Schruba, Andreas +13 more
We present the results of a proof-of-concept experiment that demonstrates that deep learning can successfully be used for production-scale classification of compact star clusters detected in Hubble Space Telescope(HST) ultraviolet-optical imaging of nearby spiral galaxies ( $D\lesssim 20\, \textrm{Mpc}$ ) in the Physics at High Angular Resolution …
KASHz: No evidence for ionised outflows instantaneously suppressing star formation in moderate luminosity AGN at z ∼ 1.4-2.6
Alexander, D. M.; Mainieri, V.; Cirasuolo, M. +9 more
As part of our KMOS AGN Survey at High-redshift (KASHz), we present spatially resolved VLT/KMOS and VLT/SINFONI spectroscopic data and ALMA 870 µm continuum imaging of eight z = 1.4-2.6 moderate AGN (L_{2-10 kev} = 1042-1045 ergs s-1). We map [O III], H α and rest-frame FIR emission to search for any spatial …
Slicing the cool circumgalactic medium along the major axis of a star-forming galaxy at z = 0.7
Dahle, H.; Rigby, J. R.; Bayliss, M. B. +13 more
We present spatially resolved Echelle spectroscopy of an intervening Mg II-Fe II-Mg I absorption-line system detected at zabs = 0.73379 towards the giant gravitational arc PSZ1 G311.65-18.48. The absorbing gas is associated with an inclined disc-like star-forming galaxy, whose major axis is aligned with the two arc-segments reported her…
Chemo-dynamical properties of the Anticenter Stream: a surviving disc fossil from a past satellite interaction.
Laporte, Chervin F. P.; Belokurov, Vasily; Hill, Vanessa +2 more
Using Gaia DR2, we trace the Anticenter Stream (ACS) in various stellar populations across the sky and find that it is kinematically and spatially decoupled from the Monoceros Ring. Using stars from LAMOST and SEGUE, we show that the ACS is systematically more metal-poor than Monoceros by 0.1 dex with indications of a narrower metallicity spread. …
Uncovering a 260 pc wide, 35-Myr-old filamentary relic of star formation
Boffin, Henri M. J.; Jerabkova, Tereza; Beccari, Giacomo
Several recent studies have shown that the Vela OB2 region hosts a complex constellation of sub-populations with ages in the range 10 to 50 Myr. Such populations might represent the best example of the outcome of clustered star formation in giant molecular clouds (GMCs). We use Gaia DR2 data over an area of 40 deg radius around the open cluster Co…
Pulsation among TESS A and B stars and the Maia variables
Balona, L. A.; Ozuyar, D.
Classification of over 50 000 TESS stars in sectors 1-18 has resulted in the detection of 766 pulsating main-sequence B stars as well as over 5000 δ Scuti, 2300 γ Doradus, and 114 roAp candidates. Whereas it has been assumed that high-frequency pulsations among B-type main-sequence stars are confined to the early B-type β Cephei stars, the observa…
XMM-Newton campaign on ultraluminous X-ray source NGC 1313 X-1: wind versus state variability
Guainazzi, M.; Fabian, A. C.; Pinto, C. +12 more
Most ultraluminous X-ray sources (ULXs) are thought to be powered by neutron stars and black holes accreting beyond the Eddington limit. If the compact object is a black hole or a neutron star with a magnetic field ≲1012 G, the accretion disc is expected to thicken and launch powerful winds driven by radiation pressure. Evidence of such…
Stellar masses of giant clumps in CANDELS and simulated galaxies using machine learning
Giavalisco, Mauro; Snyder, Gregory; Koekemoer, Anton +12 more
A significant fraction of high redshift star-forming disc galaxies are known to host giant clumps, whose nature and role in galaxy evolution are yet to be understood. In this work, we first present a new method based on neural networks to detect clumps in galaxy images. We use this method to detect clumps in the rest-frame optical and UV images of…
JINGLE - IV. Dust, H I gas, and metal scaling laws in the local Universe
Clements, D. L.; Lin, L.; Saintonge, A. +29 more
Scaling laws of dust, H I gas, and metal mass with stellar mass, specific star formation rate, and metallicity are crucial to our understanding of the build-up of galaxies through their enrichment with metals and dust. In this work, we analyse how the dust and metal content varies with specific gas mass (MH I/M⋆) across a div…