Search Publications
Haze evolution in temperate exoplanet atmospheres through surface energy measurements
Fortney, Jonathan J.; Moran, Sarah E.; Valenti, Jeff A. +13 more
Photochemical hazes are important opacity sources in temperate exoplanet atmospheres, hindering current observations from characterizing exoplanet atmospheric compositions. The haziness of an atmosphere is determined by the balance between haze production and removal. However, the material-dependent removal physics of the haze particles are curren…
Stellar Surface Inhomogeneities as a Potential Source of the Atmospheric Signal Detected in the K2-18b Transmission Spectrum
Kostov, Veselin B.; Barclay, Thomas; Schlieder, Joshua E. +5 more
Transmission spectroscopy of transiting exoplanets is a proven technique that can yield information on the composition and structure of a planet's atmosphere. However, transmission spectra may be compromised by inhomogeneities in the stellar photosphere. The sub-Neptune-sized habitable zone planet K2-18b has water absorption detected in its atmosp…
Comprehensive Gas Characterization of a z = 2.5 Protocluster: A Cluster Core Caught in the Beginning of Virialization?
Casey, Caitlin M.; Long, Arianna S.; Zavala, Jorge A. +6 more
In order to connect galaxy clusters to their progenitor protoclusters, we must constrain the star formation histories within their member galaxies and the timescale of virial collapse. In this paper we characterize the complex star-forming properties of a z = 2.5 protocluster in the COSMOS field using ALMA dust continuum and new Very Large Array C…
TESS survey of rotational and pulsational variability of mercury-manganese stars
Neiner, C.; Paunzen, E.; Kochukhov, O. +4 more
Mercury-manganese (HgMn) stars are late-B upper main sequence chemically peculiar stars distinguished by large overabundances of heavy elements, slow rotation, and frequent membership in close binary systems. These stars lack strong magnetic fields typical of magnetic Bp stars but occasionally exhibit non-uniform surface distributions of chemical …
Detection of Galactic and Extragalactic Millimeter-wavelength Transient Sources with SPT-3G
Ade, P. A. R.; Benabed, K.; Bouchet, F. R. +119 more
High angular resolution cosmic microwave background experiments provide a unique opportunity to conduct a survey of time-variable sources at millimeter wavelengths, a population that has primarily been understood through follow-up measurements of detections in other bands. Here we report the first results of an astronomical transient survey with t…
The GOGREEN and GCLASS surveys: first data release
Cooper, M. C.; Matharu, Jasleen; Muzzin, Adam +43 more
We present the first public data release of the GOGREEN (Gemini Observations of Galaxies in Rich Early Environments) and GCLASS (Gemini CLuster Astrophysics Spectroscopic Survey) surveys of galaxies in dense environments, spanning a redshift range 0.8 < z < 1.5. The surveys consist of deep, multiwavelength photometry and extensive Gemini GMO…
Current Sheets, Plasmoids and Flux Ropes in the Heliosphere. Part I. 2-D or not 2-D? General and Observational Aspects
Li, Gang; Bruno, R.; Malandraki, O. +13 more
Recent accumulation of a critical mass of observational material from different spacecraft complete with the enhanced abilities of numerical methods have led to a boom of studies revealing the high complexity of processes occurring in the heliosphere. Views on the solar wind filling the interplanetary medium have dramatically developed from the be…
The Galactic center chimneys: the base of the multiphase outflow of the Milky Way
Churazov, E.; Ponti, G.; Heywood, I. +2 more
Context. Outflows and feedback are key ingredients of galaxy evolution. Evidence for an outflow arising from the Galactic center (GC) - the so-called GC chimneys - has recently been discovered at radio, infrared, and X-ray bands.
Aims: We undertake a detailed examination of the spatial relationships between the emission in the different bands…
Birth of the ELMs: a ZTF survey for evolved cataclysmic variables turning into extremely low-mass white dwarfs
Rix, Hans-Walter; El-Badry, Kareem; Kupfer, Thomas +2 more
We present a systematic survey for mass-transferring and recently detached cataclysmic variables (CVs) with evolved secondaries, which are progenitors of extremely low mass white dwarfs (ELM WDs), AM CVn systems, and detached ultracompact binaries. We select targets below the main sequence in the Gaia colour-magnitude diagram with ZTF light curves…
Iron in X-COP: Tracing enrichment in cluster outskirts with high accuracy abundance profiles
Gastaldello, Fabio; Ettori, Stefano; Bartalucci, Iacopo +11 more
We present the first metal abundance profiles for a representative sample of massive clusters. Our measurements extend to R500 and are corrected for a systematic error plaguing previous outskirt estimates. Our profiles flatten out at large radii, admittedly not a new result, however the radial range and representative nature of our samp…