Search Publications
CLASSY III. The Properties of Starburst-driven Warm Ionized Outflows
Ouchi, Masami; Kewley, Lisa J.; Martin, Crystal L. +18 more
We report the results of analyses of galactic outflows in a sample of 45 low-redshift starburst galaxies in the COS Legacy Archive Spectroscopic SurveY (CLASSY), augmented by five additional similar starbursts with Cosmic Origins Spectrograph (COS) data. The outflows are traced by blueshifted absorption lines of metals spanning a wide range of ion…
CLASSY IV. Exploring UV Diagnostics of the Interstellar Medium in Local High-z Analogs at the Dawn of the JWST Era
Ravindranath, Swara; Martin, Crystal L.; Feltre, Anna +22 more
The Cosmic Origins Spectrograph (COS) Legacy Archive Spectroscopic SurveY (CLASSY) provides the first high-resolution spectral catalog of 45 local high-z analogs in the ultraviolet (UV; 1200-2000 Å) to investigate their stellar and gas properties. Here we present a toolkit of UV interstellar medium (ISM) diagnostics, analyzing the main emission li…
Gastro Library. I. The Simulated Chemodynamical Properties of Several Gaia-Sausage-Enceladus-like Stellar Halos
Laporte, Chervin F. P.; Debattista, Victor P.; Amarante, João A. S. +2 more
The Milky Way (MW) stellar halo contains relics of ancient mergers that tell the story of our galaxy's formation. Some of them are identified due to their similarity in energy, actions, and chemistry, referred to as the "chemodynamical space," and are often attributed to distinct merger events. It is also known that our galaxy went through a signi…
Probing the Physics of the Solar Atmosphere with the Multi-slit Solar Explorer (MUSE). I. Coronal Heating
Matsumoto, Takuma; Polito, Vanessa; Golub, Leon +24 more
The Multi-slit Solar Explorer (MUSE) is a proposed mission composed of a multislit extreme ultraviolet (EUV) spectrograph (in three spectral bands around 171 Å, 284 Å, and 108 Å) and an EUV context imager (in two passbands around 195 Å and 304 Å). MUSE will provide unprecedented spectral and imaging diagnostics of the solar corona at high spatial …
Exploring the AGN-Ram Pressure Stripping Connection in Local Clusters
Fritz, Jacopo; Vulcani, Benedetta; Poggianti, Bianca M. +8 more
Ram pressure stripping (RPS) by the intracluster medium is one of the most advocated mechanisms that affect the properties of cluster galaxies. A recent study based on a small sample has found that many galaxies showing strong signatures of RPS also possess an active galactic nucleus (AGN), suggesting a possible correlation between the two phenome…
How Many Elements Matter?
Ting, Yuan-Sen; Weinberg, David H.
Some studies of stars' multielement abundance distributions suggest at least 5-7 significant dimensions, but others show that many elemental abundances can be predicted to high accuracy from [Fe/H] and [Mg/Fe] (or [Fe/H] and age) alone. We show that both propositions can be, and are, simultaneously true. We adopt a machine-learning technique known…
Systematic Errors as a Source of Mass Discrepancy in Black Hole Microlensing Event OGLE-2011-BLG-0462
Udalski, Andrzej; Gould, Andrew; Mróz, Przemek
Two independent groups reported the discovery of an isolated dark stellar remnant in the microlensing event OGLE-2011-BLG-0462 based on photometric ground-based observations coupled with astrometric measurements taken with the Hubble Space Telescope. These two analyses yielded discrepant mass measurements, with the first group reporting that the l…
The Galaxy Starburst/Main-sequence Bimodality over Five Decades in Stellar Mass at z ≈ 3-6.5
Rinaldi, Pierluigi; Caputi, Karina I.; Iani, Edoardo +3 more
We study the relation between stellar mass (M *) and star formation rate (SFR) for star-forming galaxies over approximately five decades in stellar mass ( $5.5\ \lesssim \ {\mathrm{log}}_{10}({M}_{* }/{M}_{\odot })\lesssim 10.5$ ) at z ≈ 3-6.5. This unprecedented coverage has been possible thanks to the joint analysis of blank non-lense…
Beyond Spectroscopy. I. Metallicities, Distances, and Age Estimates for Over 20 Million Stars from SMSS DR2 and Gaia EDR3
Shi, Jianrong; Fan, Zhou; Huang, Yang +8 more
Accurate determinations of stellar parameters and distances for large complete samples of stars are keys for conducting detailed studies of the formation and evolution of our Galaxy. Here we present stellar atmospheric parameters (effective temperature, luminosity classifications, and metallicity) estimates for some 24 million stars determined fro…
The Hubble Space Telescope Survey of M31 Satellite Galaxies. I. RR Lyrae-based Distances and Refined 3D Geometric Structure
Lewis, Geraint F.; Cooper, M. C.; Skillman, Evan D. +33 more
We measure homogeneous distances to M31 and 38 associated stellar systems (-16.8 ≤ M V ≤ -6.0), using time-series observations of RR Lyrae stars taken as part of the Hubble Space Telescope Treasury Survey of M31 Satellites. From >700 orbits of new/archival Advanced Camera for Surveys imaging, we identify >4700 RR Lyrae stars and…