Search Publications
Missions
Journals
Publication Years
A red giant orbiting a black hole
Conroy, Charlie; Bieryla, Allyson; Latham, David W. +18 more
We report spectroscopic and photometric follow-up of a dormant black hole (BH) candidate from Gaia DR3. The system, which we call Gaia BH2, contains a ~1 M⊙ red giant and a dark companion with mass $M_2 = 8.9\pm 0.3\, {\rm M}_{\odot }$ that is very likely a BH. The orbital period, Porb = 1277 d, is much longer than that of an…
No thick carbon dioxide atmosphere on the rocky exoplanet TRAPPIST-1 c
Kreidberg, Laura; Meadows, Victoria S.; Lincowski, Andrew P. +16 more
Seven rocky planets orbit the nearby dwarf star TRAPPIST-1, providing a unique opportunity to search for atmospheres on small planets outside the Solar System1. Thanks to the recent launch of the James Webb Space Telescope (JWST), possible atmospheric constituents such as carbon dioxide (CO2) are now detectable2,3.…
EIGER. I. A Large Sample of [O III]-emitting Galaxies at 5.3 < z < 6.9 and Direct Evidence for Local Reionization by Galaxies
Simcoe, Robert A.; Kashino, Daichi; Eilers, Anna-Christina +4 more
We present a first sample of 117 [O III] λλ4960, 5008-selected star-forming galaxies at 5.33 < z < 6.93 detected in JWST/NIRCam 3.5 µm slitless spectroscopy of a $6\buildrel{\,\prime}\over{.} 5\,\times \,3\buildrel{\,\prime}\over{.} 4$ field centered on the hyperluminous quasar SDSS J0100+2802, obtained as part of the Emission-line gal…
Gaia Data Release 3. External calibration of BP/RP low-resolution spectroscopic data
Gilmore, G.; Harrison, D. L.; Fouesneau, M. +46 more
Context.Gaia Data Release 3 contains astrometry and photometry results for about 1.8 billion sources based on observations collected by the European Space Agency (ESA) Gaia satellite during the first 34 months of its operational phase (the same period covered by Gaia early Data Release 3; Gaia EDR3). Low-resolution spectra for 220 million sources …
The chemical characterization of halo substructure in the Milky Way based on APOGEE
Bizyaev, Dmitry; Cunha, Katia; Smith, Verne V. +21 more
Galactic haloes in a Λ-CDM universe are predicted to host today a swarm of debris resulting from cannibalized dwarf galaxies. The chemodynamical information recorded in their stellar populations helps elucidate their nature, constraining the assembly history of the Galaxy. Using data from APOGEE and Gaia, we examine the chemical properties of vari…
Gaia Data Release 3. Chemical cartography of the Milky Way
Prusti, T.; Mazeh, T.; Zucker, S. +447 more
Context. The motion of stars has been used to reveal details of the complex history of the Milky Way, in constant interaction with its environment. Nevertheless, to reconstruct the Galactic history puzzle in its entirety, the chemo-physical characterisation of stars is essential. Previous Gaia data releases were supported by a smaller, heterogeneo…
Unveiling the nature of infrared bright, optically dark galaxies with early JWST data
Brammer, G.; Oesch, P. A.; van Dokkum, P. +18 more
Over the last few years, both Atacama Large Millimeter/submillimeter Array (ALMA) and Spitzer observations have revealed a population of likely massive galaxies at z > 3 that was too faint to be detected inHubble Space Telescope(HST) rest-frame ultraviolet imaging. However, due to the very limited photometry for individual galaxies, the true na…
The JWST Early-release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 µm Spectrum of the Planetary-mass Companion VHS 1256-1257 b
Henning, Thomas; Fortney, Jonathan J.; Carter, Aarynn L. +108 more
We present the highest fidelity spectrum to date of a planetary-mass object. VHS 1256 b is a <20 M Jup widely separated (~8″, a = 150 au), young, planetary-mass companion that shares photometric colors and spectroscopic features with the directly imaged exoplanets HR 8799c, d, and e. As an L-to-T transition object, VHS 1256 b exists …
The impact of UV variability on the abundance of bright galaxies at z ≥ 9
Vogelsberger, Mark; Tacchella, Sandro; Boylan-Kolchin, Michael +2 more
JWST observations have revealed a population of galaxies bright enough that potentially challenge standard galaxy formation models in the Λ cold dark matter (ΛCDM) cosmology. Using a minimal empirical framework, we investigate the influence of variability on the rest-frame ultra-violet (UV) luminosity function of galaxies at z ≥ 9. Our study diffe…
High Tide or Riptide on the Cosmic Shoreline? A Water-rich Atmosphere or Stellar Contamination for the Warm Super-Earth GJ 486b from JWST Observations
Sing, David K.; Lustig-Yaeger, Jacob; Fu, Guangwei +21 more
Planets orbiting M-dwarf stars are prime targets in the search for rocky exoplanet atmospheres. The small size of M dwarfs renders their planets exceptional targets for transmission spectroscopy, facilitating atmospheric characterization. However, it remains unknown whether their host stars' highly variable extreme-UV radiation environments allow …