Search Publications
JWST UNCOVER: the overabundance of ultraviolet-luminous galaxies at z > 9
Nanayakkara, Themiya; van Dokkum, Pieter; Fujimoto, Seiji +20 more
Over the past year, JWST has uncovered galaxies at record-breaking distances up to z ~ 13. The JWST UNCOVER (ultra-deep NIRSpec and NIRcam observations before the epoch of reionization) program has obtained ultra-deep multiwavelength NIRCam imaging of the massive galaxy cluster A2744 over ~45 arcmin2 down to ~29.5 AB mag. Here, we prese…
MINDS: The JWST MIRI Mid-INfrared Disk Survey
Henning, Thomas; Waters, L. B. F. M.; Östlin, Göran +43 more
The study of protoplanetary disks has become increasingly important with the Kepler satellite finding that exoplanets are ubiquitous around stars in our galaxy and the discovery of enormous diversity in planetary system architectures and planet properties. High-resolution near-IR and ALMA images show strong evidence for ongoing planet formation in…
Cosmography with supernova Refsdal through time-delay cluster lensing: Independent measurements of the Hubble constant and geometry of the Universe
Pagano, L.; Grillo, C.; Rosati, P. +1 more
We present new measurements of the values of the Hubble constant, matter density, dark energy density, and dark energy density equation-of-state (EoS) parameters. These results have been obtained from a full strong-lensing analysis of the observed positions of 89 multiple images and 4 measured time delays of the supernova (SN) Refsdal in the Hubbl…
[Ne v] emission from a faint epoch of reionization-era galaxy: evidence for a narrow-line intermediate-mass black hole
Chisholm, J.; Schaerer, D.; Marques-Chaves, R. +16 more
Here, we present high spectral resolution
JWST FRESCO: a comprehensive census of H β + [O III] emitters at 6.8 < z < 9.0 in the GOODS fields
Chisholm, J.; Wuyts, S.; Schaerer, D. +27 more
We present the census of H
An empirical reionization history model inferred from the low-redshift Lyman continuum survey and the star-forming galaxies at z > 8
Koekemoer, Anton M.; Scarlata, Claudia; Langeroodi, Danial +8 more
We present a new analysis of the rest-frame ultraviolet (UV) and optical spectra of a sample of three z > 8 galaxies discovered behind the gravitational lensing cluster RX J2129.4+0009. We combine these observations with z > 7.5 galaxies from the literature, for which similar measurements are available. As already pointed out in other studie…
Tip of the Red Giant Branch Distances with JWST: An Absolute Calibration in NGC 4258 and First Applications to Type Ia Supernova Hosts
Casertano, Stefano; Dolphin, Andrew; Li, Siyang +12 more
The tip of the red giant branch (TRGB) allows for the measurement of precise and accurate distances to nearby galaxies based on the brightest ascent of low-mass red giant branch stars before they undergo the helium flash. With the advent of JWST, there is great promise to utilize the technique to measure galaxy distances out to at least 50 Mpc, si…
Robust Evidence for the Breakdown of Standard Gravity at Low Acceleration from Statistically Pure Binaries Free of Hidden Companions
Chae, Kyu-Hyun
It is found that Gaia Data Release 3 binary stars selected with stringent requirements on astrometric measurements and radial velocities naturally satisfy Newtonian dynamics without hidden close companions when the projected separation s ≲ 2 kau, showing that pure binaries can be selected. It is then found that pure binaries selected with the same…
Gaia's binary star renaissance
El-Badry, Kareem
Stellar multiplicity is among the oldest and richest problems in astrophysics. Binary stars are a cornerstone of stellar mass and radius measurements that underpin modern stellar evolutionary models. Binaries are the progenitors of many of the most interesting and exotic astrophysical phenomena, ranging from type Ia supernovae to gamma ray bursts,…
Outshining in the spatially resolved analysis of a strongly lensed galaxy at z = 6.072 with JWST NIRCam
Magdis, G. E.; Laporte, N.; Mason, C. A. +19 more
We present JWST/NIRCam observations of a strongly lensed, sub-L*, multiply imaged galaxy at z = 6.072, with magnification factors µ ≳ 20 across the galaxy. The galaxy has rich HST, MUSE, and ALMA ancillary observations across a broad wavelength range. Aiming to quantify the reliability of stellar mass estimates of high redshift ga…