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Aligning Planet-hosting Binaries via Dissipative Precession in Circumstellar Disks
Vanderburg, Andrew; Rice, Malena; Christian, Sam +2 more
Recent observations have demonstrated that some subsets of even moderately wide-separation planet-hosting binaries are preferentially configured such that planetary and binary orbits appear to lie within the same plane. In this work, we explore dissipation during the protoplanetary disk phase, induced by disk warping as the system is forced into n…
Dark No More: The Low-luminosity Stellar Counterpart of a Dark Cloud in the Virgo Cluster
Janowiecki, Steven; Sand, David J.; Jones, Michael G. +9 more
We have discovered the stellar counterpart to the ALFALFA Virgo 7 cloud complex, which has been thought to be optically dark and nearly star-free since its discovery in 2007. This ∼190 kpc long chain of enormous atomic gas clouds (M H I ∼ 109 M ⊙) is embedded in the hot intracluster medium of the Virgo galaxy clus…
An Optical Search for New Outbursting Low Mass X-Ray Binaries
Clarkson, William I.; Riddle, Reed; Rusholme, Ben +5 more
Transient low-mass X-ray binaries (LMXBs) are discovered largely by X-ray and gamma-ray all-sky monitors. The X-ray outburst is also accompanied by an optical brightening, which empirically can precede the detection of X-rays. Newly sensitive optical synoptic surveys may offer a complementary pathway for discovery and potential for insight into th…
GOALS-JWST: Constraining the Emergence Timescale for Massive Star Clusters in NGC 3256
Inami, Hanae; Böker, Torsten; Lenkić, Laura +28 more
We present the results of a James Webb Space Telescope NIRCam and NIRSpec investigation into the young massive star cluster (YMC) population of NGC 3256, the most cluster-rich luminous infrared galaxy in the Great Observatories All Sky LIRG Survey. We detect 3061 compact YMC candidates with a signal-to-noise ratio ≥3 at F150W, F200W, and F335M. Ba…
Time Evolution Images of the Hypergiant RW Cephei during the Rebrightening Phase Following the Great Dimming
Gies, Douglas R.; Mérand, Antoine; Monnier, John D. +17 more
Stars with initial masses larger than 8 M ⊙ undergo substantial mass loss through mechanisms that remain elusive. Unraveling the origins of this mass loss is important for comprehending the evolutionary path of these stars, the type of supernova explosion, and whether they become neutron stars or black hole remnants. In 2022 December, R…
Thermal Properties of the Hot Core Population in Sagittarius B2 Deep South.
Schilke, P.; Battersby, C.; Ginsburg, A. +7 more
We report the discovery of nine new hot molecular cores in the Deep South (DS) region of Sagittarius B2 using Atacama Large Millimeter/submillimeter Array Band 6 observations. We measure the rotational temperature of CH3OH and derive the physical conditions present within these cores and the hot core Sgr B2(S). The cores show heterogene…
Constraints on Remnant Planetary Systems as a Function of Main-sequence Mass with HST/COS
Hermes, J. J.; Redfield, Seth; Tremblay, P. -E. +8 more
As the descendants of stars with masses less than 8 M ⊙ on the main sequence, white dwarfs provide a unique way to constrain planetary occurrence around intermediate-mass stars (spectral types BAF) that are otherwise difficult to measure with radial-velocity or transit surveys. We update the analysis of more than 250 ultraviolet spectra…
The Gasing Pangkah Collaboration. I. Asteroseismic Identification and Characterization of a Rapidly Rotating Engulfment Candidate
Lewis, Geraint F.; van Saders, Jennifer; Ong, J. M. Joel +19 more
We report the discovery and characterization of TIC 350842552 ("Zvrk"), an apparently isolated, rapidly rotating (P rot ∼ 99 days) red giant observed by TESS in its southern Continuous Viewing Zone. The star's fast surface rotation is independently verified by the use of p-mode asteroseismology, strong periodicity in TESS and ASAS-SN ph…
The Sun Remains Relatively Refractory Depleted: Elemental Abundances for 17,412 Gaia RVS Solar Analogs and 50 Planet Hosts
Rampalli, Rayna; Bedell, Megan; Ness, Melissa K. +2 more
The element abundances of stars, particularly the refractory elements (e.g., Fe, Si, and Mg), play an important role in connecting stars to their planets. Most Sun-like stars do not have refractory abundance measurements since obtaining a large sample of high-resolution spectra is difficult with oversubscribed observing resources. In this work we …
CORINOS. II. JWST-MIRI Detection of Warm Molecular Gas from an Embedded, Disk-bearing Protostar
Bergner, Jennifer B.; van Dishoeck, Ewine F.; Evans, Neal J. +8 more
We present James Webb Space Telescope (JWST) Mid-InfraRed Instrument (MIRI) observations of warm CO and H2O gas in emission toward the low-mass protostar IRAS 15398-3359, observed as part of the CORINOS program. The CO is detected via the rovibrational fundamental band and hot band near 5 µm, whereas the H2O is detected…