Search Publications
Spectacular Nucleosynthesis from Early Massive Stars
Bizyaev, Dmitry; Brownstein, Joel R.; Pan, Kaike +39 more
Stars that formed with an initial mass of over 50 M ⊙ are very rare today, but they are thought to be more common in the early Universe. The fates of those early, metal-poor, massive stars are highly uncertain. Most are expected to directly collapse to black holes, while some may explode as a result of rotationally powered engines or th…
Discovery of an Apparent Red, High-velocity Type Ia Supernova at z = 2.9 with JWST
Maiolino, R.; Fox, O. D.; Rest, A. +27 more
We present the James Webb Space Telescope (JWST) discovery of SN 2023adsy, a transient object located in a host galaxy JADES-GS+53.13485‑27.82088 with a host spectroscopic redshift of 2.903 ± 0.007. The transient was identified in deep (JWST)/NIRCam imaging from the JWST Advanced Deep Extragalactic Survey (JADES) program. Photometric and spectrosc…
The SRG/eROSITA All-Sky Survey. SRG/eROSITA cross-calibration with Chandra and XMM-Newton using galaxy cluster gas temperatures
Zhang, X.; Pacaud, F.; Ramos-Ceja, M. E. +17 more
Galaxy cluster gas temperatures (T) play a crucial role in many cosmological and astrophysical studies. However, it has been shown that T measurements can significantly vary between different X-ray telescopes. These T biases can propagate to several cluster applications in which T can be used, such as measuring hydrostatic cluster masses and const…
Statistical study of a large and cleaned sample of ultraluminous and hyperluminous X-ray sources
Godet, Olivier; Tranin, Hugo; Webb, Natalie +1 more
Context. Ultraluminous and hyperluminous X-ray (ULX and HLX) sources could constitute interesting laboratories to further improve our understanding of the supermassive black hole growth through super-Eddington accretion episodes and successive mergers of lighter holes. ULXs are thought to be powered by super-Eddington accretion onto stellar-mass c…
An ALMA Spectroscopic Survey of the Brightest Submillimeter Galaxies in the SCUBA-2-COSMOS Field (AS2COSPEC): Physical Properties of z = 2–5 Ultra- and Hyperluminous Infrared Galaxies
Smail, Ian; Ao, Y.; Swinbank, A. M. +11 more
We report the physical properties of the 18 brightest (S 870 µm = 12.4–19.2 mJy) and not strongly lensed 870 µm–selected dusty star-forming galaxies (DSFGs), also known as submillimeter galaxies (SMGs), in the COSMOS field. This sample is part of an ALMA band 3 spectroscopic survey (AS2COSPEC), and spectroscopic redshifts ar…
Exploring a primordial solution for early black holes detected with JWST
Dayal, Pratika
Aims. With its rest-frame optical sensitivity, the James Webb Space Telescope (JWST) has unearthed black holes as massive as 106.2‑8.1 M⊙ at redshifts of z ∼ 8.5 ‑ 10.6. In addition to these unexpectedly high masses, many systems show unexpectedly high ratios of the black hole to stellar mass of MBH/M* ≳…
TESS Hunt for Young and Maturing Exoplanets (THYME). XI. An Earth-sized Planet Orbiting a Nearby, Solar-like Host in the 400 Myr Ursa Major Moving Group
Vanderburg, Andrew; Bieryla, Allyson; Latham, David W. +32 more
Young terrestrial worlds are critical test beds to constrain prevailing theories of planetary formation and evolution. We present the discovery of HD 63433 d—a nearby (22 pc), Earth-sized planet transiting a young Sun-like star (TOI-1726, HD 63433). HD 63433 d is the third planet detected in this multiplanet system. The kinematic, rotational, and …
ALMA survey of a massive node of the Cosmic Web at z ∼ 3. I. Discovery of a large overdensity of CO emitters
Wang, W.; Ginolfi, M.; Fossati, M. +12 more
Submillimeter surveys toward overdense regions in the early Universe are essential for uncovering the obscured star formation and the cold gas content of assembling galaxies within massive dark matter halos. In this work, we present deep ALMA mosaic observations covering an area of ∼2'×2' around MUSE Quasar Nebula 01 (MQN01), one of the largest an…
A critical review of recent Gaia wide binary gravity tests
Hernandez, X.; Chae, Kyu-Hyun; Aguayo-Ortiz, A.
Over the last couple of years, the appearance of the third data release from the Gaia satellite has triggered various wide binary low acceleration gravity tests. Wide binaries with typical total masses $\approx 1.0 - 1.6\,\mathrm{ M}_{\odot }$ and separations above a few thousand au probe the low acceleration $a \lesssim a_{0}$ regime, where at ga…
Multiple Clues for Dayside Aerosols and Temperature Gradients in WASP-69 b from a Panchromatic JWST Emission Spectrum
Fortney, Jonathan J.; Moran, Sarah E.; Bell, Taylor J. +16 more
WASP-69 b is a hot, inflated, Saturn-mass planet (0.26 M Jup) with a zero-albedo equilibrium temperature of 963 K. Here, we report the JWST 2–12 µm emission spectrum of the planet consisting of two eclipses observed with NIRCam grism time series and one eclipse observed with the MIRI low-resolution spectrometer (LRS). The emission…