Search Publications
The ODYSSEUS Survey. Motivation and First Results: Accretion, Ejection, and Disk Irradiation of CVSO 109
Fang, Min; Edwards, Suzan; Banzatti, Andrea +59 more
The Hubble UV Legacy Library of Young Stars as Essential Standards (ULLYSES) Director's Discretionary Program of low-mass pre-main-sequence stars, coupled with forthcoming data from Atacama Large Millimeter/submillimeter Array and James Webb Space Telescope, will provide the foundation to revolutionize our understanding of the relationship between…
The incidence of X-ray selected AGN in nearby galaxies
Birchall, Keir L.; Watson, M. G.; Aird, J. +1 more
We present the identification and analysis of an unbiased sample of active galactic nuclei (AGN) that lie within the local galaxy population. Using the MPA-JHU catalogue (based on SDSS DR8) and 3XMM DR7 we define a parent sample of 25 949 local galaxies (z ≤ 0.33). After confirming that there was strictly no AGN light contaminating stellar mass an…
New constraints on anisotropic expansion from supernovae Type Ia
van Dyk, D. A.; Hudson, M. J.; Trotta, R. +2 more
We re-examine the contentious question of constraints on anisotropic expansion from Type Ia supernovae (SNIa) in the light of a novel determination of peculiar velocities, which are crucial to test isotropy with SNe out to distances ⪝200h-1 Mpc. We re-analyse the Joint Light-Curve Analysis (JLA) Supernovae (SNe) data, improving on previ…
Direct Constraints on the Extremely Metal-poor Massive Stars Underlying Nebular C IV Emission from Ultra-deep HST/COS Ultraviolet Spectroscopy
Charlot, Stéphane; Chevallard, Jacopo; Sanders, Ryan L. +8 more
Metal-poor nearby galaxies hosting massive stars have a fundamental role to play in our understanding of both high-redshift galaxies and low-metallicity stellar populations. But while much attention has been focused on their bright nebular gas emission, the massive stars that power it remain challenging to constrain. Here we present exceptionally …
The Structure of the Large-Scale Heliosphere as Seen by Current Models
Heerikhuisen, Jacob; Fraternale, Federico; Pogorelov, Nikolai +6 more
This review summarizes the current state of research aiming at a description of the global heliosphere using both analytical and numerical modeling efforts, particularly in view of the overall plasma/neutral flow and magnetic field structure, and its relation to energetic neutral atoms. Being part of a larger volume on current heliospheric researc…
The chemical signature of the Galactic spiral arms revealed by Gaia DR3
Schultheis, M.; Recio-Blanco, A.; de Laverny, P. +8 more
Taking advantage of the recent Gaia Data Release 3 (DR3), we mapped chemical inhomogeneities in the Milky Way's disc out to a distance of ∼4 kpc from the Sun, using different samples of bright giant stars. The samples were selected using effective temperatures and surface gravities from the GSP-Spec module, and they are expected to trace stellar p…
HST Strong-lensing Model for the First JWST Galaxy Cluster SMACS J0723.3-7327
Zitrin, Adi; Furtak, Lukas J.; Meena, Ashish K. +1 more
On 2022 July 8, NASA shared (https://www.nasa.gov/feature/goddard/2022/nasa-shares-list-of-cosmic-targets-for-webb-telescope-s-first-images) the list of five public showcase targets that have been observed with the new James Webb Space Telescope (JWST) and whose data-at the time of writing-are expected to be released to the public around Tuesday, …
Gas condensation in brightest group galaxies unveiled with MUSE. Morphology and kinematics of the ionized gas
Godard, B.; Gaspari, M.; Babul, A. +18 more
The origin of the cold gas in central galaxies in groups is still a matter of debate. We present Multi-Unit Spectroscopic Explorer (MUSE) observations of 18 optically selected local (z ≤ 0.017) brightest group galaxies (BGGs) to study the kinematics and distribution of the optical emission-line gas. MUSE observations reveal a distribution of gas m…
H α morphologies of star clusters in 16 LEGUS galaxies: Constraints on H II region evolution time-scales
Boquien, M.; Calzetti, D.; Adamo, A. +14 more
The analysis of star cluster ages in tandem with the morphology of their H II regions can provide insight into the processes that clear a cluster's natal gas, as well as the accuracy of cluster ages and dust reddening derived from Spectral Energy Distribution (SED) fitting. We classify 3757 star clusters in 16 nearby galaxies according to their H …
The galaxy group NGC 507: Newly detected AGN remnant plasma transported by sloshing
Simionescu, A.; Brunetti, G.; Gastaldello, F. +15 more
Jets from active galactic nuclei (AGN) are known to recurrently enrich their surrounding medium with mildly relativistic particles and magnetic fields. Here, we present a detailed multi-frequency analysis of the nearby (z = 0.01646) galaxy group NGC 507. In particular, we present new high-sensitivity and high-spatial-resolution radio images in the…