Search Publications
Identification and properties of intense star-forming galaxies at redshifts z > 10
Maiolino, R.; Sun, F.; Egami, E. +53 more
Surveys with the James Webb Space Telescope (JWST) have discovered candidate galaxies in the first 400 Myr of cosmic time. Preliminary indications have suggested these candidate galaxies may be more massive and abundant than previously thought. However, without confirmed distances, their inferred properties remain uncertain. Here we identify four …
A JWST transmission spectrum of the nearby Earth-sized exoplanet LHS 475 b
Sing, David K.; Lustig-Yaeger, Jacob; Fu, Guangwei +20 more
The critical first step in the search for life on exoplanets over the next decade is to determine whether rocky planets transiting small M-dwarf stars possess atmospheres and, if so, what processes sculpt them over time. Because of its broad wavelength coverage and improved resolution compared with previous instruments, spectroscopy with the James…
A rich hydrocarbon chemistry and high C to O ratio in the inner disk around a very low-mass star
Waters, L. B. F. M.; Olofsson, G.; Abergel, A. +43 more
Carbon is an essential element for life but how much can be delivered to young planets is still an open question. The chemical characterization of planet-forming disks is a crucial step in our understanding of the diversity and habitability of exoplanets. Very low-mass stars (less than 0.2 M⊙) are interesting targets because they host a…
Evidence for the volatile-rich composition of a 1.5-Earth-radius planet
Fortney, Jonathan J.; Knutson, Heather A.; Angus, Ruth +18 more
The population of planets smaller than approximately 1.7 Earth radii (R⊕) is widely interpreted as consisting of rocky worlds, generally referred to as super-Earths. This picture is largely corroborated by radial velocity mass measurements for close-in super-Earths but lacks constraints at lower insolations. Here we present the results …
The Milky Way's plane of satellites is consistent with ΛCDM
Jenkins, Adrian; Frenk, Carlos; Helly, John +7 more
The Milky Way is surrounded by 11 `classical' satellite galaxies in a remarkable configuration: a thin plane that is possibly rotationally supported. Such a structure is thought to be highly unlikely to arise in the standard (ΛCDM) cosmological model (Λ cold dark matter model, where Λ is the cosmological constant). While other apparent discrepanci…
A calibration point for stellar evolution from massive star asteroseismology
Bowman, Dominic M.; Vanderspek, Roland; Aerts, Conny +10 more
Massive stars are progenitors of supernovae, neutron stars and black holes. During the hydrogen-core burning phase, their convective cores are the prime drivers of their evolution, but inferences of core masses are subject to unconstrained boundary mixing processes. Moreover, uncalibrated transport mechanisms can lead to strong envelope mixing and…
Sub-per-cent determination of the brightness at the tip of the red giant branch in the Magellanic Clouds
Hoyt, Taylor J.
The value of the Hubble constant as constrained by type Ia supernovae is directly tied to the zero point of the extragalactic distance scale, which is in turn set by the calibration of astrophysical distance indicators such as the tip of the red giant branch (TRGB). In this article, a calibration of the TRGB luminosity is determined in the Magella…
A 5.3-min-period pulsing white dwarf in a binary detected from radio to X-rays
Kepler, S. O.; Heywood, I.; Dhillon, V. S. +19 more
White dwarf stars are the most common stellar fossils. When in binaries, they make up the dominant form of compact object binary within the Galaxy and can offer insight into different aspects of binary formation and evolution. One of the most remarkable white dwarf binary systems identified to date is AR Scorpii (AR Sco). AR Sco is composed of an …
Coherent radio bursts from known M-dwarf planet-host YZ Ceti
Pineda, J. Sebastian; Villadsen, Jackie
Observing magnetic star-planet interactions (SPIs) offers promise for determining the magnetic fields of exoplanets. Models of sub-Alfvénic SPIs predict that terrestrial planets in close-in orbits around M dwarfs can induce detectable stellar radio emission, manifesting as bursts of strongly polarized coherent radiation observable at specific plan…
Direct images and spectroscopy of a giant protoplanet driving spiral arms in MWC 758.
Dong, Ruobing; Wagner, Kevin; Stone, Jordan +23 more
Understanding the driving forces behind spiral arms in protoplanetary disks remains a challenge due to the faintness of young giant planets. MWC 758 hosts such a protoplanetary disk with a two-armed spiral pattern that is suggested to be driven by an external giant planet. We present observations in the thermal infrared that are uniquely sensitive…