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JWST NIRCam Photometry: A Study of Globular Clusters Surrounding Bright Elliptical Galaxy VV 191a at z = 0.0513
Grogin, Norman A.; Holwerda, Benne W.; Koekemoer, Anton M. +22 more
James Webb Space Telescope NIRCam images have revealed 154 reliable globular cluster (GC) candidates around the z = 0.0513 elliptical galaxy VV 191a after subtracting 34 likely interlopers from background galaxies inside our search area. NIRCam broadband observations are made at 0.9–4.5 µm using the F090W, F150W, F356W, and F444W filters. Us…
Multiplicity of stars with planets in the solar neighbourhood
Caballero, J. A.; Cortés-Contreras, M.; Cifuentes, C. +3 more
Aims. We intended to quantify the impact of stellar multiplicity on the presence and properties of exoplanets. Methods. We investigated all exoplanet host stars at less than 100 pc using the latest astrometric data from Gaia DR3 and advanced statistical methodologies. We complemented our search for common proper motion and parallax companions with…
A Broadband X-Ray Investigation of Fast-spinning Intermediate Polar CTCV J2056–3014
Hailey, Charles J.; Mori, Kaya; Ramsay, Gavin +5 more
We report on XMM-Newton, NuSTAR, and NICER X-ray observations of CTCV J2056–3014, a cataclysmic variable (CV) with one of the fastest-spinning white dwarfs (WDs) at P = 29.6 s. While previously classified as an intermediate polar, CJ2056 also exhibits the properties of WZ Sge–type CVs, such as dwarf novae and superoutbursts. With XMM-Newton and NI…
WIYN Open Cluster Study. XC. Radial-velocity Measurements and Spectroscopic Binary Orbits in the Open Cluster NGC 2506
Latham, David W.; Linck, Evan; Mathieu, Robert D.
NGC 2506 is a rich, intermediate-age (2.0 Gyr), metal-poor ([Fe/H] ∼ ‑0.2) open cluster. This work presents the results of 12,157 spectroscopic radial-velocity measurements of 2442 stars in the NGC 2506 field obtained over 41 yr, made as part of the WIYN Open Cluster Study. Radial-velocity measurements are complete for the population of proper-mot…
Large-field CO (J = 1−0) observations toward SNR G150.3+4.5
Zhang, Shiyu; Su, Yang; Chen, Xuepeng +4 more
Aims: We aim to investigate the molecular environment of the supernova remnant (SNR) G150.3+4.5, and explore its association with ambient molecular clouds (MCs).
Methods: We present large-field CO (J = 1−0) molecular line observations toward SNR G150.3+4.5, using the 13.7 m millimeter telescope of the Purple Mountain Observatory. The obs…
A Repeating Fast Radio Burst Source in a Low-luminosity Dwarf Galaxy
Bhandari, Shivani; Kaspi, Victoria M.; Cognard, Ismaël +52 more
We present the localization and host galaxy of FRB 20190208A, a repeating source of fast radio bursts (FRBs) discovered using CHIME/FRB. As part of the Pinpointing REpeating ChIme Sources with EVN dishes repeater localization program on the European VLBI Network (EVN), we monitored FRB 20190208A for 65.6 hr at ∼1.4 GHz and detected a single burst,…
Effects of coronal rain on decayless kink oscillations of coronal loops
Antolin, Patrick; Pant, Vaibhav; Shrivastav, Arpit Kumar
Decayless kink oscillations are ubiquitously observed in active region coronal loops with an almost constant amplitude for several cycles. Decayless kink oscillations of coronal loops triggered by coronal rain have been analyzed, but the impact of coronal rain formation in an already oscillating loop is unclear. As kink oscillations can help diagn…
High-precision astrometry with VVV. II. A near-infrared extension of Gaia into the Galactic plane
Minniti, D.; Anderson, J.; Bedin, L. R. +4 more
Aims: We use near-infrared, ground-based data from the VISTA Variables in the Via Lactea (VVV) survey to indirectly extend the astrometry provided by the Gaia catalog to objects in heavily extinct regions toward the Galactic bulge and plane that are beyond Gaia's reach.
Methods: We made use of state-of-the-art techniques developed for hi…
The Resolved Star Formation Law in NGC 7469 from JWST, ALMA, and VLA
Fiore, Fabrizio; Lapi, Andrea; Salvestrini, Francesco +4 more
We investigate the star formation process within the central 3.3 kpc region of the nearby luminous infrared Seyfert NGC 7469, probing scales ranging from 88 to 330 pc. We combine JWST/MIRI imaging with the F770W filter, with CO(2 – 1) and the underlying 1.3 mm dust continuum data from the Atacama Large Millimeter/submillimeter Array, along with Ka…
Solar Wind Structures from the Gaussianity of Magnetic Magnitude
Velli, Marco; Matteini, Lorenzo; Sioulas, Nikos +9 more
The heliosphere is permeated with highly structured solar wind originating from the Sun. One of the primary science objectives of Parker Solar Probe (PSP) is to determine the structures and dynamics of the plasma and magnetic fields at the sources of the solar wind. However, establishing the connection between in situ measurements and structures a…