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A hot mini-Neptune and a temperate, highly eccentric sub-Saturn around the bright K-dwarf TOI-2134
Deleuil, M.; Vanderburg, A.; Winn, J. N. +64 more
We present the characterization of an inner mini-Neptune in a 9.2292005 ± 0.0000063 d orbit and an outer mono-transiting sub-Saturn planet in a 95.50$^{+0.36}_{-0.25}$ d orbit around the moderately active, bright (mv = 8.9 mag) K5V star TOI-2134. Based on our analysis of five sectors of TESS data, we determine the radii of TOI-2134b and…
A Triple Scenario for the Formation of Wide Black Hole Binaries Such as Gaia BH1
Generozov, A.; Perets, H. B.
Recently, several noninteracting black hole–stellar binaries have been identified in Gaia data—for example, Gaia BH1, where a Sun-like star is in a moderately eccentric (e = 0.44) 185 days orbit around a black hole. This orbit is difficult to explain through binary evolution. The present-day separation suggests the progenitor system would have und…
Coronal Heating and Solar Wind Generation by Flux Cancellation Reconnection
Chitta, L. P.; Priest, E. R.; Titov, V. S. +1 more
In this paper, we propose that flux cancellation on small granular scales (≲1000 km) ubiquitously drives reconnection at a multitude of sites in the low solar atmosphere, contributing to chromospheric/coronal heating and the generation of the solar wind. We analyze the energy conversion in these small-scale flux cancellation events using both anal…
101 eclipsing quadruple star candidates discovered in TESS full frame images
Kostov, Veselin B.; Powell, Brian P.; Rappaport, Saul A. +17 more
We present our second catalogue of quadruple star candidates, containing 101 systems discovered in TESS Full-Frame Image data. The targets were initially detected as eclipsing binary stars with the help of supervised machine learning methods applied to sectors (Sectors 1 through 54). A dedicated team of citizen scientists subsequently identified t…
JWST/MIRI Detection of Suprathermal OH Rotational Emissions: Probing the Dissociation of the Water by Lyα Photons near the Protostar HOPS 370
Manoj, P.; Narang, Mayank; Beuther, Henrik +22 more
Using the MIRI medium-resolution spectrometer on JWST, we have detected pure rotational, suprathermal OH emissions from the vicinity of the intermediate-mass protostar HOPS 370 (OMC2/FIR3). These emissions are observed from shocked knots in a jet/outflow and originate in states of rotational quantum number as high as 46 that possess excitation ene…
Galaxy clustering at cosmic dawn from JWST/NIRCam observations to redshift z 11
Boyett, Kristan; Trenti, Michele; Leethochawalit, Nicha +1 more
We report measurements of the galaxy two-point correlation function at cosmic dawn, using photometrically selected sources from the JWST Advanced Deep Extragalactic Survey (JADES). The JWST/NIRCam data set comprises approximately $N_g \simeq 7000$ photometrically selected Lyman Break Galaxies (LBGs), spanning in the redshift range $5\le z\lt 11$. …
Origin of the correlation between stellar kinematics and globular cluster system richness in ultradiffuse galaxies
Forbes, Duncan A.; Romanowsky, Aaron J.; Brodie, Jean P. +9 more
Observational surveys have found that the dynamical masses of ultradiffuse galaxies (UDGs) correlate with the richness of their globular cluster (GC) system. This could be explained if GC-rich galaxies formed in more massive dark matter haloes. We use simulations of galaxies and their GC systems from the E-MOSAICS project to test whether the simul…
The Next Generation Virgo Cluster Survey (NGVS). XXVII. The Size and Structure of Globular Cluster Systems and Their Connection to Dark Matter Halos
Emsellem, Eric; Gwyn, Stephen D. J.; Müller, Oliver +18 more
We study the size and structure of globular cluster (GC) systems of 118 early-type galaxies from the NGVS, MATLAS, and ACSVCS surveys. Fitting Sérsic profiles, we investigate the relationship between effective radii of GC systems (R e,gc) and galaxy properties. GC systems are 2–4 times more extended than host galaxies across the entire…
Evolved Massive Stars at Low Metallicity. VI. Mass-loss Rate of Red Supergiant Stars in the Large Magellanic Cloud
Yang, Ming; Gao, Jian; Ren, Yi +4 more
Mass loss is a crucial process that affects the observational properties, evolution path, and fate of highly evolved stars. However, the mechanism of mass loss is still unclear, and the mass-loss rate (MLR) of red supergiant stars (RSGs) requires further research and precise evaluation. To address this, we utilized an updated and complete sample o…
High-resolution ALMA Observations of Richly Structured Protoplanetary Disks in σ Orionis
Czekala, Ian; Huang, Jane; Long, Feng +5 more
The Atacama Large Millimeter/submillimeter Array (ALMA) has detected substructures in numerous protoplanetary disks at radii from a few to over 100 au. These substructures are commonly thought to be associated with planet formation, either by serving as sites fostering planetesimal formation or by arising as a consequence of planet–disk interactio…