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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…
High-precision Atmospheric Characterization of a Y Dwarf with JWST NIRSpec G395H Spectroscopy: Isotopologue, C/O Ratio, Metallicity, and the Abundances of Six Molecular Species
Fortney, Jonathan J.; Batalha, Natasha E.; Johnstone, Doug +19 more
The launch of the James Webb Space Telescope (JWST) marks a pivotal moment for precise atmospheric characterization of Y dwarfs, the coldest brown dwarf spectral type. In this study, we leverage moderate spectral resolution observations (R ∼ 2700) with the G395H grating of the Near-Infrared Spectrograph (NIRSpec) on board JWST to characterize the …
Dynamics of a Galaxy at z > 10 Explored by JWST Integral Field Spectroscopy: Hints of Rotating Disk Suggesting Weak Feedback
Ono, Yoshiaki; Ouchi, Masami; Harikane, Yuichi +9 more
We investigate the dynamics of GN-z11, a luminous galaxy at z = 10.60, carefully analyzing the public deep integral field spectroscopy (IFS) data taken with the JWST NIRSpec integral field unit. While the observations of the IFS data originally targeted an He II clump near GN-z11, we find that the C III] λ λ1907, 1909 emission from ionized gas at …
Precision MARS Mass Reconstruction of A2744: Synergizing the Largest Strong-lensing and Densest Weak-lensing Data Sets from JWST
Jee, M. James; Cha, Sangjun; HyeongHan, Kim +2 more
We present a new high-resolution free-form mass model of A2744 that combines both weak-lensing (WL) and strong-lensing (SL) data sets from JWST. The SL data set comprises 286 multiple images, presenting the most extensive SL constraint to date for a single cluster. The WL data set, employing photo-z selection, yields a source density of $\sim 350\…
High-precision Astrometry and Photometry with the JWST/MIRI Imager
Law, David R.; Hines, Dean C.; Álvarez-Márquez, Javier +8 more
Astrometry is one of the main pillars of astronomy, and one of its oldest branches. Over the years, an increasing number of astrometric works by means of Hubble Space Telescope (HST) data have revolutionized our understanding of various phenomena. With the launch of JWST, it becomes almost instinctive to want to replicate or improve these results …
Setting the Stage for the Search for Life with the Habitable Worlds Observatory: Properties of 164 Promising Planet-survey Targets
Kane, Stephen R.; Dressing, Courtney D.; Harada, Caleb K. +1 more
The Decadal Survey on Astronomy and Astrophysics 2020 has recommended that NASA realize a large IR/optical/UV space telescope optimized for high-contrast imaging and spectroscopy of ∼25 exo-Earths and transformative general astrophysics. The NASA Exoplanet Exploration Program (ExEP) has subsequently released a list of 164 nearby (d < 25 pc) tar…
The SRG/eROSITA all-sky survey. Identifying the coronal content with HamStar
Schmitt, J. H. M. M.; Salvato, M.; Czesla, S. +6 more
Context. The first eROSITA all-sky survey (eRASS1) performed on board the Spectrum-Roentgen-Gamma mission (SRG) provides more than 900 000 X-ray sources in the 0.2-2.3 keV band located in the western hemisphere.
Aims: We present identifications of the eRASS1 sources obtained using our HamStar method, which was designed for the identification …
On the formation of a 33 solar-mass black hole in a low-metallicity binary
El-Badry, Kareem
A 33M⊙ black hole (BH) was recently discovered in an 11.6-year binary only 590 pc from the Sun. The system, Gaia BH3, contains a 0.8M⊙ low-metallicity giant () that is a member of the ED-2 stellar stream. This paper investigates whether the system could have formed via isolated binary evolution. I construct evolutionary models for metal-poor massi…