Search Publications
Slow Rotation for the Super-puff Planet Kepler-51d
Winn, Joshua N.; Lammers, Caleb
Super-puffs are low-density planets of unknown origin and composition. If they form by accreting nebular gas through a circumplanetary disk, one might expect super-puffs to be spinning quickly. Here, we derive upper limits on the rotational oblateness of the super-puff Kepler-51d, based on precise transit observations with the NIRSpec instrument o…
Searching for GEMS: Characterizing Six Giant Planets Around Cool Dwarfs
Kobulnicky, Henry A.; Vanderburg, Andrew; Kowalski, Adam F. +42 more
Transiting giant exoplanets around M-dwarf stars (GEMS) are rare, owing to the low-mass host stars. However, the all-sky coverage of TESS has enabled the detection of an increasingly large number of them to enable statistical surveys like the Searching for GEMS survey. As part of this endeavor, we describe the observations of six transiting giant …
Radial Wave in the Galactic Disk: New Clues to Discriminate Different Perturbations
Antoja, Teresa; Schönrich, Ralph; Li, Zhao-Yu +1 more
Decoding the key dynamical processes that shape the Galactic disk structure is crucial for reconstructing the Milky Way's evolution history. The second Gaia data release unveils a novel wave pattern in the L Z ‑<V R > space, but its formation mechanism remains elusive due to the intricate nature of involved perturbati…
Evidence for transient morning water frost deposits on the Tharsis volcanoes of Mars
Vandaele, A. C.; Daerden, F.; Ristic, B. +27 more
The present-day water cycle on Mars has implications for habitability and future human exploration. Water ice clouds and water vapour have been detected above the Tharsis volcanic province, suggesting the active exchange of water between regolith and atmosphere. Here we report observational evidence for extensive transient morning frost deposits o…
eROSITA studies of the Carina nebula
Sasaki, Manami; Pühlhofer, Gerd; Tsuge, Kisetsu +4 more
Context. During the first four all-sky surveys eRASS:4, which was carried out from December 2019 to 2021, the extended Roentgen Survey with an Imaging Telescope Array (eROSITA) on board the Spektrum-Roentgen-Gamma (Spektr-RG, SRG) observed the Galactic H II region, the Carina nebula.
Aims: We analysed the eRASS:4 data to study the distributio…
Benchmarking the IRDC G351.77-0.53: Gaia DR3 distance, mass distribution, and star formation content
Megeath, S. T.; Xu, Fengwei; Stutz, A. M. +4 more
While intensively studied, it remains unclear how the star formation (SF) in infrared dark clouds (IRDCs) compares to that of nearby clouds. We study G351.77-0.53 (henceforth G351), a cluster-forming filamentary IRDC. We begin by characterizing its young stellar object (YSO) content. Based on the average parallax of likely members, we obtain a Gai…
The Orbit and Companion of PSR J1622-0315: Variable Asymmetry and a Massive Neutron Star
Kennedy, Mark R.; Turchetta, Marco; Sen, Bidisha +6 more
The companion to PSR J1622-0315, one of the most compact known redback millisecond pulsars, shows extremely low irradiation despite its short orbital period. We model this system to determine the binary parameters, combining optical observations from the New Technology Telescope in 2017 and the Nordic Optical Telescope in 2022 with the binary mode…
An X-ray high-frequency quasi-periodic oscillation in NGC 1365
Zhang, P.; Chang, Z.; Yan, J. Z. +4 more
This study presents the detection of a high-frequency quasi-periodic oscillation (QPO) in the Seyfert galaxy NGC 1365 based on observational data obtained by XMM-Newton in January 2004. Utilizing the weighted wavelet Z-transform (WWZ) and Lomb-Scargle periodogram (LSP) methods, a QPO signal is identified at a frequency of 2.19 × 10‑4 Hz…
Assessing the Performance of the ADAPT and AFT Flux Transport Models Using In Situ Measurements from Multiple Satellites
Warren, Harry P.; Linton, Mark G.; Ugarte-Urra, Ignacio +7 more
The launches of Parker Solar Probe (Parker) and Solar Orbiter (SolO) are enabling a new era of solar wind studies that track the solar wind from its origin at the photosphere, through the corona, to multiple vantage points in the inner heliosphere. A key ingredient for these models is the input photospheric magnetic field map that provides the bou…
VaDAR: Varstrometry for Dual AGN Using Radio Interferometry
Nyland, Kristina; Clarke, Tracy E.; Satyapal, Shobita +5 more
Binary and dual active galactic nuclei (AGNs) are an important observational tool for studying the formation and dynamical evolution of galaxies and supermassive black holes. An entirely new method for identifying possible AGN pairs makes use of the exquisite positional accuracy of Gaia to detect astrometrically variable quasars, in tandem with th…