Search Publications
CLASSY. X. Highlighting Differences between Partial Covering and Semianalytic Modeling in the Estimation of Galactic Outflow Properties
Martin, Crystal L.; Charlot, Stéphane; Skillman, Evan D. +17 more
Feedback-driven massive outflows play a crucial role in galaxy evolution by regulating star formation and influencing the dynamics of surrounding media. Extracting outflow properties from spectral lines is a notoriously difficult process for a number of reasons, including the possibility that a substantial fraction of the outflow is carried by den…
Chemical abundances and deviations from the solar S/O ratio in the gas-phase interstellar medium of galaxies based on infrared emission lines
Pérez-Díaz, Borja; Pérez-Montero, Enrique; Fernández-Ontiveros, Juan A. +3 more
Context. The infrared (IR) range is extremely useful in the context of chemical abundance studies of the gas-phase interstellar medium (ISM) due to the large variety of ionic species traced in this regime, the negligible effects from dust attenuation or temperature stratification, and the amount of data that has been and will be released in the co…
A-SLOTH reveals the nature of the first stars
Glover, Simon C. O.; Klessen, Ralf S.; Hartwig, Tilman +1 more
The first generation of stars (Pop III) are too dim to be observed directly and probably too short-lived to have survived for local observations. Hence, we rely on simulations and indirect observations to constrain the nature of the first stars. In this study, we calibrate the semi-analytical model A-SLOTH (Ancient Stars and Local Observables by T…
Double "acct": A Distinct Double-peaked Supernova Matching Pulsational Pair Instability Models
Rest, A.; Angus, C. R.; Foley, R. J. +35 more
We present multiwavelength data of SN 2020acct, a double-peaked stripped-envelope supernova (SN) in NGC 2981 at ∼150 Mpc. The two peaks are temporally distinct, with maxima separated by 58 rest-frame days and a factor of 20 reduction in flux between. The first is luminous (Mr = ‑18.00 ± 0.02 mag) and blue (g ‑ r = 0.27 ± 0.03 mag) and d…
The frequency of metal enrichment of cool helium-atmosphere white dwarfs using the DESI early data release
Brooks, D.; Doel, P.; Honscheid, K. +35 more
There is an overwhelming evidence that white dwarfs host planetary systems; revealed by the presence, disruption, and accretion of planetary bodies. A lower limit on the frequency of white dwarfs that host planetary material has been estimated to be ≃ 25-50 per cent; inferred from the ongoing or recent accretion of metals on to both hydrogen-atmos…
Gliese 12 b: A Temperate Earth-sized Planet at 12 pc Ideal for Atmospheric Transmission Spectroscopy
Henning, Thomas; Usuda, Tomonori; Hellier, Coel +103 more
Recent discoveries of Earth-sized planets transiting nearby M dwarfs have made it possible to characterize the atmospheres of terrestrial planets via follow-up spectroscopic observations. However, the number of such planets receiving low insolation is still small, limiting our ability to understand the diversity of the atmospheric composition and …
What Is Missing from the Local Stellar Halo?
Conroy, Charlie; Naidu, Rohan P.; Sharpe, Katherine
The Milky Way's stellar halo, which extends to >100 kpc, encodes the evolutionary history of our Galaxy. However, most studies of the halo to date have been limited to within a few kiloparsecs of the Sun. Here, we characterize differences between this local halo and the stellar halo in its entirety. We construct a composite stellar halo model b…
Detection of the lowest mass ratio contact binary in the universe: TYC 3801-1529-1
Li, Kai; Chen, Xu; Guo, Di-Fu +7 more
This paper presents the first analysis of the contact binary TYC 3801-1529-1. We observed four sets of multiple bands complete light curves and one set of radial velocity curve of the primary component. Based on a simultaneous investigation of our observed and TESS light curves and the radial velocity curve, we found that TYC 3801-1529-1 is an ext…
A Snapshot Survey of Nearby Supernovae with the Hubble Space Telescope
Van Dyk, Schuyler D.; Filippenko, Alexei V.; Kelly, Patrick L. +12 more
Over recent decades, robotic (or highly automated) searches for supernovae (SNe) have discovered several thousand events, many of them in quite nearby galaxies (distances < 30 Mpc). Most of these SNe, including some of the best-studied events to date, were found before maximum brightness and have associated with them extensive follow-up photome…
Two-dimensional kinematics and dynamical modelling of the 'Jackpot' gravitational lens from deep MUSE observations
Collett, Thomas E.; Smith, Russell J.; Turner, Hannah C.
We present results from the first spatially resolved kinematic and dynamical modelling analysis of the unique SDSSJ0946+1006 ('Jackpot') triple-source lens system, where a single massive foreground $z\, =\, 0.222$ galaxy multiple-images three background sources at different redshifts. Deep integral field unit spectroscopic data were obtained using…