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Ice inventory towards the protostar Ced 110 IRS4 observed with the James Webb Space Telescope: Results from the Early Release Science Ice Age program
Sun, F.; Egami, E.; van Dishoeck, E. F. +37 more
Context. Protostars contain icy ingredients necessary for the formation of potential habitable worlds, therefore, it is crucial to understand their chemical and physical environments. This work is focused on the ice features towards the binary protostellar system Ced 110 IRS4A and IRS4B, separated by 250 au and observed with James Webb Space Teles…
The Discovery and Characterization of Minimoon 2024 PT5
Chiboucas, Kristin; Lemaux, Brian C.; Bolin, Bryce T. +4 more
Minimoons are asteroids that become temporarily captured by the Earth–Moon system. We present the discovery of 2024 PT5, a minimoon discovered by the Asteroid Terrestrial-impact Last Alert System Sutherland telescope on 2024 August 7. The minimoon with heliocentric semimajor axis, a ~ 1.01 au, and perihelion, q ~ 0.99 au, became capture…
Euclid: A complete Einstein ring in NGC 6505
Altieri, B.; Aussel, H.; Cimatti, A. +195 more
We report the discovery of a complete Einstein ring around the elliptical galaxy NGC 6505, at z = 0.042. This is the first strong gravitational lens discovered in Euclid and the first in an NGC object from any survey. The combination of the low redshift of the lens galaxy, the brightness of the source galaxy (IE = 18.1 lensed, IE
Variability of Central Stars of Planetary Nebulae with the Zwicky Transient Facility. I. Methods, Short-timescale Variables, and the Unusual Nucleus of WeSb 1
Kulkarni, S. R.; Riddle, Reed; Kong, Albert K. H. +16 more
A complete understanding of the central stars of planetary nebulae (CSPNe) remains elusive. Over the past several decades, time-series photometry of CSPNe has yielded significant results including, but not limited to, discoveries of nearly 100 binary systems, insights into pulsations and winds in young white dwarfs, and studies of stars undergoing…
The magnetic field of the Radcliffe wave: Starlight polarization at the nearest approach to the Sun
Alves, J.; Panopoulou, G. V.; Soler, J. D. +6 more
Aims. We investigate the geometry of the magnetic field toward the Radcliffe wave, a coherent part of the nearby Local Arm of 3 kpc in length recently discovered via three-dimensional dust mapping. Methods. We used archival stellar polarization in the optical and new measurements in the near-infrared to trace the magnetic field as projected on the…
Deeply comprehensive astrometric, photometric, and kinematic studies of the three OCSN open clusters with Gaia DR3
Elsanhoury, W. H.; Çınar, D. C.; Haroon, A. A. +1 more
In this study, we considered the optical wavelength of Gaia Data Release 3 (DR3) to analyze poorly studied three newly open star clusters, namely OCSN 203, OCSN 213, and OCSN 244 clusters with ASTECA code. Here, we identified 227, 200, and 551 candidates with highly probable (
On Finding Black Holes in Photometric Microlensing Surveys
Lu, Jessica R.; McGill, Peter; Dawson, William A. +5 more
There are expected to be millions of isolated black holes in the galaxy resulting from the deaths of massive stars. Measuring the abundance and properties of this remnant population would shed light on the end stages of stellar evolution and the evolution paths of black hole systems. Detecting isolated black holes is currently only possible via gr…
Empirical Color Correction to MIST and PARSEC Isochrones on Gaia BR ‑ RP and G ‑ RP with Benchmark Open Clusters
Fang, Min; Wang, Fan; Tian, Haijun +8 more
Recent literature reports a color deviation between observed Gaia color–magnitude diagrams (CMDs) and theoretical model isochrone predictions, particularly in the very low-mass regime. To assess its impact on cluster age determination via isochrone fitting, we quantified the color deviations for three benchmark clusters, Hyades, Pleiades, and Prae…
Multiwavelength Constraints on the Local Black Hole Occupation Fraction
Geha, Marla; Baldassare, Vivienne F.; Natarajan, Priyamvada +1 more
The fraction of dwarf galaxies hosting central, intermediate-mass black holes (IMBHs) at low redshifts is an important observational probe of black hole seeding at high redshift. Detections of nuclear accretion signatures in dwarf galaxies provides strong evidence for the presence of these IMBHs. We develop a Bayesian model to infer the black hole…
Dark Galactic Subhalos and the Gaia Snail
Bovy, Jo; Benson, Andrew; Frankel, Neige +1 more
Gaia has revealed a clear signal of disequilibrium in the solar neighborhood in the form of a spiral (or snail) feature in the vertical phase-space distribution. We investigate the possibility that this structure emerges from ongoing perturbations by dark