Search Publications
The Next Generation Deep Extragalactic Exploratory Public (NGDEEP) Survey
Papovich, Casey; Finkelstein, Steven L.; Pérez-González, Pablo G. +45 more
We present the Next Generation Deep Extragalactic Exploratory Public (NGDEEP) Survey, a deep slitless spectroscopic and imaging Cycle 1 JWST treasury survey designed to constrain feedback mechanisms in low-mass galaxies across cosmic time. NGDEEP targets the Hubble Ultra Deep Field (HUDF) with NIRISS slitless spectroscopy ( ${f}_{\mathrm{lim},\mat…
JADES: Detecting [OIII]λ4363 emitters and testing strong line calibrations in the high-z Universe with ultra-deep JWST/NIRSpec spectroscopy up to z ∼ 9.5
Chevallard, Jacopo; Maseda, Michael V.; Carniani, Stefano +32 more
We present ten novel [OIII]λ4363 auroral line detections up to z ∼ 9.5 measured from ultra-deep JWST/NIRSpec MSA spectroscopy from the JWST Advanced Deep Extragalactic Survey (JADES). We leverage the deepest spectroscopic observations taken thus far with NIRSpec to determine electron temperatures and oxygen abundances using the direct Te
UNCOVER: A NIRSpec Census of Lensed Galaxies at z = 8.50–13.08 Probing a High-AGN Fraction and Ionized Bubbles in the Shadow
Nanayakkara, Themiya; van Dokkum, Pieter; Fujimoto, Seiji +33 more
We present JWST NIRSpec prism spectroscopy of lensed galaxies at z ≳ 9 found behind the massive galaxy cluster Abell 2744 in the UNCOVER Cycle 1 Treasury Program. We confirm the redshift via emission lines and/or the Lyα break for 10 galaxies at z = 8.50–13.08 down to M V = ‑17.3. We achieve a 100% confirmation rate for z > 9 candi…
JADES: Carbon enrichment 350 Myr after the Big Bang
Chevallard, Jacopo; Carniani, Stefano; Übler, Hannah +27 more
Finding the emergence of the first metals in the early Universe and identifying their origin are some of the most important goals of modern astrophysics. We present deep JWST/NIRSpec spectroscopy of GS-z12, a galaxy at z = 12.5, in which we report the detection of the C III]λλ1907,1909 nebular emission line. This represents the most distant detect…
JADES. Possible Population III signatures at z = 10.6 in the halo of GN-z11
Charlot, Stéphane; Carniani, Stefano; Übler, Hannah +33 more
Finding the first generation of stars formed out of pristine gas in the early Universe, known as Population III (PopIII) stars, is one of the most important goals of modern astrophysics. Recent models have suggested that PopIII stars may form in pockets of pristine gas in the halo of more evolved galaxies. We present NIRSpec integral field spectro…
RUBIES: Evolved Stellar Populations with Extended Formation Histories at z ∼ 7–8 in Candidate Massive Galaxies Identified with JWST/NIRSpec
Cleri, Nikko J.; Labbé, Ivo; van Dokkum, Pieter +17 more
The identification of red, apparently massive galaxies at z > 7 in early James Webb Space Telescope (JWST) photometry suggests a strongly accelerated time line compared to standard models of galaxy growth. A major uncertainty in the interpretation is whether the red colors are caused by evolved stellar populations, dust, or other effects such a…
SO2, silicate clouds, but no CH4 detected in a warm Neptune
Henning, Thomas; Östlin, Göran; Güdel, Manuel +43 more
WASP-107b is a warm (approximately 740 K) transiting planet with a Neptune-like mass of roughly 30.5 M⊕ and Jupiter-like radius of about 0.94 RJ (refs. 1,2), whose extended atmosphere is eroding3. Previous observations showed evidence for water vapour and a thick, high-altitude condensate layer in the at…
The dark matter profile of the Milky Way inferred from its circular velocity curve
Frebel, Anna; Eilers, Anna-Christina; Necib, Lina +1 more
In this paper, we construct the circular velocity curve of the Milky Way out to ~30 kpc, providing an updated model of the dark matter density profile. We derive precise parallaxes for 120 309 stars with a data-driven model, using APOGEE DR17 spectra combined with GaiaDR3, 2MASS, and WISE photometry. At outer galactic radii up to 30 kpc, we find a…
A dormant overmassive black hole in the early Universe
Charlot, Stéphane; Chevallard, Jacopo; Carniani, Stefano +25 more
Recent observations have found a large number of supermassive black holes already in place in the first few hundred million years after the Big Bang, many of which seem to be overmassive relative to their host galaxy stellar mass when compared with local relation1, 2, 3, 4, 5, 6, 7, 8–9. Several different models have been proposed to ex…
CEERS: Diversity of Lyα Emitters during the Epoch of Reionization
Papovich, Casey; Finkelstein, Steven L.; Arrabal Haro, Pablo +31 more
We analyze rest-frame ultraviolet to optical spectra of three z ≃ 7.47–7.75 galaxies whose Lyα emission lines were previously detected with Keck/MOSFIRE observations, using the JWST/NIRSpec observations from the Cosmic Evolution Early Release Science survey. From NIRSpec data, we confirm the systemic redshifts of these Lyα emitters, and emission-l…