Search Publications
ENISALA. II. Distinct Star Formation and Active Galactic Nucleus Activity in Merging and Relaxed Galaxy Clusters
Sobral, David; Stroe, Andra
The growth of galaxy clusters is energetic and may trigger and/or quench star formation and black hole activity. The ENISALA4 project is a collection of multiwavelength observations aimed at understanding how large-scale structure drives galaxy and black hole evolution. Here, we introduce optical spectroscopy of over 800 Hα emission-lin…
RELICS: ICL Analysis of the z = 0.566 Merging Cluster WHL J013719.8-08284
Coe, Dan; Jiménez-Teja, Yolanda; Dupke, Renato A. +3 more
We present a pilot study of the intracluster light (ICL) in massive clusters using imaging of the z = 0.566 cluster of galaxies WHL J013719.8-08284 observed by the RELICS project with the Hubble Space Telescope. We measure the ICL fraction in four optical ACS/WFC filters (F435W, F475W, F606W, and F814W) and five infrared WFC3/IR bands (F105W, F110…
Three-dimensional Climate Simulations for the Detectability of Proxima Centauri b
Berrilli, Francesco; Giovannelli, Luca; Galuzzo, Daniele +2 more
The discovery of a planet orbiting around Proxima Centauri, the closest star to the Sun, opens new avenues for the remote observations of the atmosphere and surface of an exoplanet, Proxima b. To date, three-dimensional (3D) general circulation models (GCMs) are the best available tools to investigate the properties of the exo-atmospheres, waiting…
Molecular Gas within the Milky Way's Nuclear Wind
Richter, Philipp; Jenkins, Edward B.; Savage, Blair D. +9 more
We report the first direct detection of molecular hydrogen associated with the Galactic nuclear wind. The Far-Ultraviolet Spectroscopic Explorer spectrum of LS 4825, a B1 Ib-II star at l, b = 1.67°,-6.63° lying d = 9.9 ${}_{-0.8}^{+1.4}$ kpc from the Sun, ~1 kpc below the Galactic plane near the Galactic center, shows two high-velocity H2
A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). IV. Rapidly Growing (Super)Massive Black Holes in Extremely Radio-loud Galaxies
Lee, Chien-Hsiu; Schramm, Malte; Ueda, Yoshihiro +19 more
We present the optical and infrared properties of 39 extremely radio-loud galaxies discovered by cross-matching the Subaru/Hyper Suprime-Cam (HSC) deep optical imaging survey and VLA/FIRST 1.4 GHz radio survey. The recent Subaru/HSC strategic survey revealed optically faint radio galaxies (RG) down to gAB ~ 26, opening a new parameter s…
Cloud Properties of Brown Dwarf Binaries across the L/T Transition
Barman, Travis; Stone, Jordan M.; Konopacky, Quinn M. +1 more
We present a new suite of atmosphere models with flexible cloud parameters to investigate the effects of clouds on brown dwarfs across the L/T transition. We fit these models to a sample of 13 objects with well-known masses, distances, and spectral types spanning L3-T5. Our modeling is guided by spatially resolved photometry from the Hubble Space …
The Diverse Morphologies and Structures of Dwarf Galaxies Hosting Optically Selected Active Massive Black Holes
Greene, Jenny E.; Geha, Marla; Schutte, Zachary +2 more
We present a study of 41 dwarf galaxies hosting active massive black holes (BHs) using Hubble Space Telescope observations. The host galaxies have stellar masses in the range of M⋆ ∼ 108.5-109.5 M⊙ and were selected to host active galactic nuclei (AGNs) based on narrow emission line ratios derived from S…
Discovery of Double-ring Structure in the Supernova Remnant N103B: Evidence for Bipolar Winds from a Type Ia Supernova Progenitor
Acero, Fabio; Yamaguchi, Hiroya; Chu, You-Hua +1 more
The geometric structure of supernova remnants (SNR) provides a clue to unveiling the pre-explosion evolution of their progenitors. Here we present an X-ray study of N103B (0509-68.7), a Type Ia SNR in the Large Magellanic Cloud, that is known to be interacting with dense circumstellar matter (CSM). Applying our novel method for feature extraction …
Estimating the Contribution of Foreground Halos to the FRB 180924 Dispersion Measure
Simha, Sunil; Prochaska, J. Xavier; Ryder, Stuart D. +6 more
Fast radio burst (FRB) dispersion measures (DMs) record the presence of ionized baryons that are otherwise invisible to other techniques enabling resolution of the matter distribution in the cosmic web. In this work, we aim to estimate the contribution to FRB 180924 DM from foreground galactic halos. Localized by ASKAP to a massive galaxy, this si…
An Atacama Large Millimeter/submillimeter Array Survey of Chemistry in Disks around M4-M5 Stars
Pascucci, Ilaria; Wilner, David J.; Cleeves, L. Ilsedore +10 more
M-stars are the most common hosts of planetary systems in the Galaxy. Protoplanetary disks around M-stars thus offer a prime opportunity to study the chemistry of planet-forming environments. We present an Atacama Large Millimeter/submillimeter Array survey of molecular line emission toward a sample of five protoplanetary disks around M4-M5 stars …