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The Spatial Relation between Young Star Clusters and Molecular Clouds in M 51 with LEGUS
K. Grasha, D. Calzetti, A. Adamo +21
We present a study correlating the spatial locations of young star clusters with those of molecular clouds in NGC~5194, in order to investigate the timescale over which clusters se…
Exploring the origins of a new, apparently metal-free gas cloud at z = 4.4
P. Frédéric Robert, Michael T. Murphy, John M. O'Meara +2
We report the discovery and analysis of only the third Lyman-limit system in which a high-quality resolution, echelle spectrum reveals no metal absorption lines, implying a metalli…
The core of the massive cluster merger MACS J0417.5-1154 as seen by VLT/MUSE
Mathilde Jauzac, Guillaume Mahler, Alastair C. Edge +11
We present a multi-wavelength analysis of the core of the massive galaxy cluster MACS\,J0417.5-1154 (; MACS\;J0417). Our analysis takes advantage of VLT/MUSE observation…
SLUG IV: A Novel Forward-Modelling Method to Derive the Demographics of Star Clusters
Mark R. Krumholz, Angela Adamo, Michele Fumagalli +1
We describe a novel method for determining the demographics of a population of star clusters, for example distributions of cluster mass and age, from unresolved photometry. This me…
Overdensity of submillimeter galaxies around the MAMMOTH-1 nebula
F. Arrigoni Battaia, Chian-Chou Chen, M. Fumagalli +7
In the hierarchical model of structure formation, giant elliptical galaxies form through merging processes within the highest density peaks known as protoclusters. While high-redsh…
A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE).IV. A tail of Ionised Gas in the Merger Remnant NGC 4424
A. Boselli, M. Fossati, G. Consolandi +31
We have observed the late-type peculiar galaxy NGC 4424 during VESTIGE, a blind narrow-band Halpha[NII] imaging survey of the Virgo cluster carried out with MegaCam at the CFHT. Th…
Measurement of the primordial helium abundance from the intergalactic medium
Ryan Cooke, Michele Fumagalli
Almost every helium atom in the Universe was created just a few minutes after the Big Bang through a process commonly referred to as Big Bang Nucleosynthesis. The amount of helium…
MCMC determination of the cosmic UV background at from H fluorescence
Davide Caruso, Francesco Haardt, Michele Fumagalli +1
In a recent paper (Fumagalli et al. 2017) we reported on the detection of a diffuse H glow in the outskirts of the nearby, edge-on disc galaxy UGC 7321 observed with the Multi U…
Theoretical predictions for IMF diagnostics in UV spectroscopy of star clusters
Greg Ashworth, Michele Fumagalli, Angela Adamo +1
We explore the possibility of using UV spectroscopy in combination with broad-band photometry as diagnostic tools for understanding the shape of the Initial Mass Function (IMF) in…
A comparison of young star properties with local galactic environment for LEGUS/LITTLE THINGS dwarf irregular galaxies
Deidre A. Hunter, Angela Adamo, Bruce G. Elmegreen +25
We have explored the role environmental factors play in determining characteristics of young stellar objects in nearby dwarf irregular and Blue Compact Dwarf galaxies. Star cluster…
The spectral and environment properties of quasar pairs
Elisabeta Lusso, Michele Fumagalli, Marc Rafelski +5
We present the first results from our survey of intervening and proximate Lyman limit systems (LLSs) at 2.0-2.5 using the Wide Field Camera 3 on-board the Hubble Space Tel…
Quasars probing quasars X: The quasar pair spectral database
Joseph R. Findlay, J. Xavier Prochaska, Joseph F. Hennawi +8
The rare close projection of two quasars on the sky provides the opportunity to study the host galaxy environment of a foreground quasar in absorption against the continuum emissio…
A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE).III. Star formation in the stripped gas of NGC 4254
A. Boselli, M. Fossati, J. C. Cuillandre +22
During pilot observations of the Virgo Environmental Survey Tracing Galaxy Evolution (VESTIGE), a blind narrow-band Halpha+[NII] imaging survey of the Virgo cluster carried out wit…
A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE). II. Constraining the quenching time in the stripped galaxy NGC 4330
M. Fossati, J. T. Mendel, A. Boselli +24
The Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE) is a blind narrow-band H+[NII] imaging survey carried out with MegaCam at the CFHT. During pilot observatio…
A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE).I. Introduction to the Survey
A. Boselli, M. Fossati, L. Ferrarese +56
The Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE) is a blind narrow-band Halpha+[NII] imaging survey carried out with MegaCam at the Canada-France-Hawaii Telesc…
A study of two dwarf irregular galaxies with asymmetrical star formation distributions
Deidre A. Hunter, Samavarti Gallardo, Hong-Xin Zhang +23
Two dwarf irregular galaxies DDO 187 and NGC 3738 exhibit a striking pattern of star formation: intense star formation is taking place in a large region occupying roughly half of t…