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The Cusp Plasma Imaging Detector (CuPID) CubeSat Observatory: Mission Overview
Thomas, N.; Porter, F. S.; Kuntz, K. D. +28 more
The Cusp Plasma Imaging detector (CuPID) Cube Satellite Observatory is a six unit Cube Satellite developed to study macroscale properties of dayside magnetopause reconnection. Reconnection will be studied through imaging spatial and temporal ion dispersion signatures in the magnetospheric cusps. As reconnection enables shocked solar wind plasma to…
DIISC-II: Unveiling the Connections between Star Formation and Interstellar Medium in the Extended Ultraviolet Disk of NGC 3344
Heckman, Timothy; Kennicutt, Robert C.; Thilker, David +6 more
We present our investigation of the extended ultraviolet (XUV) disk galaxy, NGC 3344, conducted as part of Deciphering the Interplay between the Interstellar medium, Stars, and the Circumgalactic medium survey. We use surface and aperture photometry of individual young stellar complexes to study star formation and its effect on the physical proper…
Anomalous Stellar Populations in Low-surface-brightness Galaxies
Schombert, James; McGaugh, Stacy
We present new Hubble Space Telescope WFC3 near-IR observations of the color-magnitude diagrams (CMDs) in two low-surface-brightness galaxies, F575-3 and F615-1, notable for having no current star formation based on a lack of Hα emission. Key features of the near-IR CMDs are resolved, such as the red giant branch (RGB), the asymptotic giant branch…
Reaching the Oldest Stars beyond the Local Group: Ancient Star Formation in UGC 4483
Aloisi, Alessandra; Cignoni, Michele; Sacchi, Elena +9 more
We present new WFC3/UVIS observations of UGC 4483, the closest example of a metal-poor blue compact dwarf galaxy, with a metallicity of Z ≃ 1/15 Z⊙ and located at a distance of D ≃ 3.4 Mpc. The extremely high quality of our new data allows us to clearly resolve the multiple stellar evolutionary phases populating the color-magnitude diag…
Evidence for widespread glaciation in Arcadia Planitia, Mars
Osinski, Gordon R.; Golombek, Matthew P.; Williams, Nathan R. +2 more
Viscous flow features, including lobate debris aprons and lineated valley fill, are common ice-related features found across the mid-latitudes of Mars. These features are commonly found along the dichotomy boundary and around massifs where snow and ice can accumulate and flow to topographic lows during periods of higher obliquity. We have identifi…
X-Ray Binaries in M51 I: Catalog and Statistics
Chandar, Rupali; Rangelov, Blagoy; Prestwich, Andrea +3 more
We used archival data from the Chandra X-ray Observatory (Chandra) and the Hubble Space Telescope, to identify 334 candidate X-ray binary systems and their potential optical counterparts in the interacting galaxy pair NGC 5194/5195 (M51). We present the catalog and data analysis of X-ray and optical properties for those sources, from the deep 892 …
Superorbital Modulation in the High-mass X-Ray Binary 4U 1538-52 and Possible Modulation in IGR J16393-4643
Roche, Paul; Pottschmidt, Katja; Corbet, Robin H. D. +2 more
Hard X-ray observations with the Neil Gehrels Swift Observatory Burst Alert Telescope (BAT) reveal superorbital modulation in the wind-accreting supergiant high-mass X-ray binary (HMXB) 4U 1538-52 at a period of 14.9130 ± 0.0026 days that is consistent with four times the 3.73 day orbital period. These periods agree with a previously suggested cor…
Investigation and application of fitting models for centering algorithms in astrometry
Lin, F. R.; Peng, Q. Y.; Zheng, Z. J. +2 more
To determine the precise positions of stars in CCD frames, various centering algorithms have been proposed for astrometry. The effective point spread function (ePSF) and the Gaussian centering algorithms are two representative centering algorithms. This paper compares in detail and investigates these two centering algorithms in performing data red…
NGTS and HST insights into the long-period modulation in GW Librae
Reichart, D. E.; Hermes, J. J.; Gänsicke, B. T. +17 more
Light curves of the accreting white dwarf pulsator GW Librae spanning a 7.5-month period in 2017 were obtained as part of the Next-Generation Transit Survey. This data set comprises 787 h of photometry from 148 clear nights, allowing the behaviour of the long (hours) and short-period (20 min) modulation signals to be tracked from night to night ov…
Ultraviolet Imaging Telescope (UVIT) observation of the Galactic globular cluster NGC 7492
Pradhan, Ananta C.; Mohapatra, Abhisek; Parthasarathy, M. +4 more
We present detailed photometric observations of the Galactic globular cluster NGC 7492 using the data obtained with two far-ultraviolet (FUV; 1300-1800 Å) and three near-ultraviolet (NUV; 2000-3000 Å) filters of Ultraviolet Imaging Telescope (UVIT) onboard the AstroSat satellite. We confirmed the cluster membership of the extracted sources using G…