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Extreme emission line galaxies detected in JADES JWST/NIRSpec - I. Inferred galaxy properties
Charlot, Stéphane; Chevallard, Jacopo; Maseda, Michael V. +33 more
Extreme emission line galaxies (EELGs) exhibit large equivalent widths (EW) in their rest-optical emission lines ([O III]
The ultraviolet continuum slopes of high-redshift galaxies: evidence for the emergence of dust-free stellar populations at z > 10
Bowler, R. A. A.; Cullen, F.; McLure, R. J. +11 more
We present an analysis of the ultraviolet (UV) continuum slopes (β) for a sample of 172 galaxy candidates at 8 < zphot < 16 selected from a combination of JWST NIRCam imaging and COSMOS/UltraVISTA ground-based near-infrared imaging. Focusing primarily on a new sample of 121 galaxies at ⟨z⟩ ≃ 11 selected from ≃ 320 arcmin2
A pulsar in a binary with a compact object in the mass gap between neutron stars and black holes
Cadelano, Mario; Pallanca, Cristina; Freire, Paulo C. C. +22 more
Some compact objects observed in gravitational wave events have masses in the gap between known neutron stars (NSs) and black holes (BHs). The nature of these mass gap objects is unknown, as is the formation of their host binary systems. We report pulsar timing observations made with the Karoo Array Telescope (MeerKAT) of PSR J0514‑4002E, an eccen…
The Evolution of Massive Binary Stars
Marchant, Pablo; Bodensteiner, Julia
Massive stars play a major role in the evolution of their host galaxies and serve as important probes of the distant Universe. It has been established that the majority of massive stars reside in close binaries and interact with their companion stars during their lifetimes. Such interactions drastically alter their life cycles and complicate our u…
No massive black holes in the Milky Way halo
Udalski, Andrzej; Mróz, Przemek; Szymański, Michał K. +13 more
The gravitational wave detectors have shown a population of massive black holes that do not resemble those observed in the Milky Way1–3 and whose origin is debated4–6. According to a possible explanation, these black holes may have formed from density fluctuations in the early Universe (primordial black holes)7–9, …
Small Magellanic Cloud Cepheids Observed with the Hubble Space Telescope Provide a New Anchor for the SH0ES Distance Ladder
Casertano, Stefano; Riess, Adam G.; Soszyński, Igor +7 more
We present phase-corrected photometric measurements of 88 Cepheid variables in the core of the Small Magellanic Cloud (SMC), the first sample obtained with the Hubble Space Telescope's (HST) Wide Field Camera 3, in the same homogeneous photometric system as past measurements of all Cepheids on the SH0ES distance ladder. We limit the sample to the …
Galaxy morphology from z ∼ 6 through the lens of JWST
Wuyts, S.; Elbaz, D.; Dickinson, M. +27 more
Context. The James Webb Space Telescope's (JWST's) unprecedented combination of sensitivity, spatial resolution, and infrared coverage has enabled a new era of galaxy morphology exploration across most of cosmic history.
Aims: We analyze the near-infrared (NIR ∼ 0.8 − 1 µm) rest-frame morphologies of galaxies with log M*/M
A Systematic Analysis of the X-Ray Emission in Optically Selected Tidal Disruption Events: Observational Evidence for the Unification of the Optically and X-Ray-selected Populations
Cenko, S. Bradley; van Velzen, Sjoert; Gezari, Suvi +4 more
We present a systematic analysis of the X-ray emission of a sample of 17 optically selected, X-ray-detected tidal disruption events (TDEs) discovered between 2014 and 2021. The X-ray light curves show a diverse range of temporal behaviors, with most sources not following the expected power-law decline. The X-ray spectra are mostly extremely soft a…
Lyα Emission at z = 7–13: Clear Evolution of Lyα Equivalent Width Indicating a Late Cosmic Reionization History
Ono, Yoshiaki; Ouchi, Masami; Harikane, Yuichi +6 more
We present the evolution of Lyα emission derived from 53 galaxies at z = 6.6–13.2, which have been identified by multiple JWST/NIRSpec spectroscopy programs of Early Release Science, General Observer, Director's Discretionary Time, and Guaranteed Time Observations. These galaxies fall on the star formation main sequence and are typical star-formin…
ALMA Lensing Cluster Survey: Deep 1.2 mm Number Counts and Infrared Luminosity Functions at z ≃ 1–8
Ouchi, Masami; Ivison, R. J.; Koekemoer, Anton M. +40 more
We present a statistical study of 180 dust continuum sources identified in 33 massive cluster fields by the Atacama Large Millimeter/submillimeter Array Lensing Cluster Survey (ALCS) over a total of 133 arcmin2 area, homogeneously observed at 1.2 mm. ALCS enables us to detect extremely faint millimeter sources by lensing magnification, …