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Target Selection and Validation of DESI Luminous Red Galaxies
Moustakas, J.; Myers, Adam D.; Brooks, D. +46 more
The Dark Energy Spectroscopic Instrument (DESI) is carrying out a five-year survey that aims to measure the redshifts of tens of millions of galaxies and quasars, including 8 million luminous red galaxies (LRGs) in the redshift range 0.4 < z ≲ 1.0. Here we present the selection of the DESI LRG sample and assess its spectroscopic performance usi…
Photochemically produced SO2 in the atmosphere of WASP-39b
Henning, Thomas; Fortney, Jonathan J.; Carter, Aarynn L. +82 more
Photochemistry is a fundamental process of planetary atmospheres that regulates the atmospheric composition and stability1. However, no unambiguous photochemical products have been detected in exoplanet atmospheres so far. Recent observations from the JWST Transiting Exoplanet Community Early Release Science Program2,3 found …
A massive quiescent galaxy at redshift 4.658
Wild, Vivienne; Dunlop, James S.; Cullen, Fergus +10 more
The extremely rapid assembly of the earliest galaxies during the first billion years of cosmic history is a major challenge for our understanding of galaxy formation physics1-5. The advent of the James Webb Space Telescope (JWST) has exacerbated this issue by confirming the existence of galaxies in substantial numbers as early as the fi…
JADES: Probing interstellar medium conditions at z ∼ 5.5-9.5 with ultra-deep JWST/NIRSpec spectroscopy
Chevallard, Jacopo; Maseda, Michael V.; Parlanti, Eleonora +42 more
We present emission-line ratios from a sample of 27 Lyman-break galaxies from z ∼ 5.5 − 9.5 with −17.0 < M1500 < −20.4, measured from ultra-deep JWST/NIRSpec multi-object spectroscopy from the JWST Advanced Deep Extragalactic Survey (JADES). We used a combination of 28 h deep PRISM/CLEAR and 7 h deep G395M/F290LP observations to m…
JWST CEERS and JADES Active Galaxies at z = 4-7 Violate the Local M •-M ⋆ Relation at >3σ: Implications for Low-mass Black Holes and Seeding Models
Carniani, Stefano; Maiolino, Roberto; Fan, Xiaohui +2 more
JWST is revolutionizing our understanding of the high-z Universe by expanding the black hole horizon, looking farther and to smaller masses, and revealing the stellar light of their hosts. By examining JWST galaxies at z = 4-7 that host Hα-detected black holes, we investigate (i) the high-z M •-M ⋆ relation and (ii) the black…
A Sun-like star orbiting a black hole
Conroy, Charlie; Rix, Hans-Walter; Howard, Andrew W. +18 more
We report discovery of a bright, nearby ($G = 13.8;\, \, d = 480\, \rm pc$) Sun-like star orbiting a dark object. We identified the system as a black hole candidate via its astrometric orbital solution from the Gaia mission. Radial velocities validated and refined the Gaia solution, and spectroscopy ruled out significant light contributions from a…
UNCOVER: A NIRSpec Identification of a Broad-line AGN at z = 8.50
Nanayakkara, Themiya; Fujimoto, Seiji; Bezanson, Rachel +29 more
Deep observations with the James Webb Space Telescope (JWST) have revealed an emerging population of red pointlike sources that could provide a link between the postulated supermassive black hole seeds and observed quasars. In this work, we present a JWST/NIRSpec spectrum from the JWST Cycle 1 UNCOVER Treasury survey of a massive accreting black h…
Evolution of the UV LF from z 15 to z 8 using new JWST NIRCam medium-band observations over the HUDF/XDF
van Dokkum, Pieter G.; Illingworth, Garth D.; Brammer, Gabriel +7 more
We present the first constraints on the prevalence of z > 10 galaxies in the Hubble Ultra Deep Field (HUDF) leveraging new NIRCam observations from JEMS (JWST Extragalactic Medium-band Survey). These NIRCam observations probe redward of 1.6 µm, beyond the wavelength limit of HST, allowing us to search for galaxies to z > 10. These obse…
Tidal Disruption Event Demographics with the Zwicky Transient Facility: Volumetric Rates, Luminosity Function, and Implications for the Local Black Hole Mass Function
Kulkarni, S. R.; Cenko, S. Bradley; Riddle, Reed +26 more
We conduct a systematic tidal disruption event (TDE) demographics analysis using the largest sample of optically selected TDEs. A flux-limited, spectroscopically complete sample of 33 TDEs is constructed using the Zwicky Transient Facility over 3 yr (from 2018 October to 2021 September). We infer the black hole (BH) mass (M BH) with hos…
UNCOVER: The Growth of the First Massive Black Holes from JWST/NIRSpec-Spectroscopic Redshift Confirmation of an X-Ray Luminous AGN at z = 10.1
Papovich, Casey; van Dokkum, Pieter; Fujimoto, Seiji +27 more
The James Webb Space Telescope is now detecting early black holes (BHs) as they transition from "seeds" to supermassive BHs. Recently, Bogdan et al. reported the detection of an X-ray luminous supermassive BH, UHZ-1, with a photometric redshift at z > 10. Such an extreme source at this very high redshift provides new insights on seeding and gro…