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Photometric, astrometric, and kinematical characteristics of two Xuyi's open clusters utilizing Gaia DR3 data
Belwal, Kuldeep; Bisht, D.; Bisht, Mohit Singh +6 more
This study reports and examines two poorly studied open star clusters surveyed from XSTPS-GAC, namely Xuyi 15 and Xuyi 23, using the Gaia DR3 catalog data. We identified 570 (Xuyi 15) and 824 (Xuyi 23) stars as highly probable astrometric members with membership probability higher than 60
Finding Lensed Radio Sources with the Very Large Array Sky Survey
Martinez, Michael N.; Gordon, Yjan A.; Bechtol, Keith +3 more
Radio observations of strongly lensed objects are valuable as cosmological probes. Lensed radio sources have proven difficult to identify, in large part due to the limited depth and angular resolution of the previous generation of radio sky surveys, and, as such, only a few dozen lensed radio sources are known. In this work, we present the results…
GRB 241107A: A Giant Flare from a Close-by Extragalactic Magnetar?
Mereghetti, Sandro; Salvaterra, Ruben; Ubertini, Pietro +5 more
We report the results on the short gamma-ray burst GRB 241107A, obtained with the IBIS instrument on board the INTEGRAL satellite. The burst had a duration of about 0.2 s, a fluence of 8 × 10‑7 erg cm‑2 in the 20 keV–10 MeV range, and a hard spectrum, characterized by a peak energy of 680 keV. The position of GRB 241107A has …
Stellar flare morphology with TESS across the main sequence
Kriskovics, L.; Pál, A.; Görgei, A. +5 more
Context. Stellar flares are abundant in space photometric light curves. As they are now available in large enough numbers, the statistical study of their overall temporal morphology is timely. Aims. We use light curves from the Transiting Exoplanet Survey Satellite (TESS) to study the shapes of stellar flares beyond a simple parameterization by du…
Quasiperiodic Super-Alfvénic Slippage along Flare Ribbons Observed by the Interface Region Imaging Spectrograph
Hou, Yijun; Li, Ting; Zhou, Guiping +3 more
The apparent slipping motion of flare loops is regarded as a key feature of the 3D magnetic reconnection in the solar flares. The slippage with a super-Alfvénic speed could be defined as slipping–running reconnection, while the slippage with a sub-Alfvénic speed is called slipping reconnection. Due to the limitation of the observational instrument…
Understanding the Broad-line Region of Active Galactic Nuclei with Photoionization. I. The Moderate-accretion Regime
Brandt, W. N.; Shen, Yue; Ho, Luis C. +9 more
Over three decades of reverberation mapping (RM) studies on local broad-line active galactic nuclei (AGNs) have measured reliable black hole (BH) masses for >100 AGNs. These RM measurements reveal a significant correlation between the Balmer broad-line region (BLR) size and AGN optical luminosity (the R–L relation). Recent RM studies for AGN sa…
Three warm Jupiters orbiting TOI-6628, TOI-3837, and TOI-5027 and one sub-Saturn orbiting TOI-2328
Trifonov, Trifon; Henning, Thomas; Bieryla, Allyson +35 more
We report the discovery and characterization of three new transiting giant planets orbiting TOI-6628, TOI-3837, and TOI-5027 and one new warm sub-Saturn orbiting TOI-2328, whose transits events were detected in the light curves of the Transiting Exoplanet Survey Satellite (TESS) space mission. By combining TESS light curves with ground-based photo…
Testing Cluster Membership of Planetary Nebulae with High-precision Proper Motions. II. HST Observations of PHR J1315–6555 in the Open Cluster AL 1 (ESO 96-SC04)
Bond, Howard E.; Sahu, Kailash C.; Bellini, Andrea
Planetary nebulae (PNe) shown to be members of star clusters provide information on their properties and evolutionary histories that cannot be determined for PNe in the field, in particular the initial masses of their progenitor stars. Here we investigate the bipolar PN PHR J1315‑6555 (hereafter PHR J1315), which lies near the open cluster AL 1 (E…
The S-PLUS Ultra-short Survey: Photometric Recalibration with the Best Star Database
Huang, Yang; Beers, Timothy C.; Sestito, Federico +15 more
We present an independent validation and comprehensive recalibration of S-PLUS Ultra-short Survey (USS) DR1 12-band photometry using about 30,000–70,000 standard stars from the Best Star (BEST) database. We identify the spatial variation of zero-point offsets, up to 30–40 mmag for blue filters (u, J0378, and J0395) and 10 mmag for others, predomin…
Global Transport of Chlorine Species in the Martian Atmosphere and the Resulting Surface Distribution of Perchlorates
Patel, M. R.; Korablev, O.; Olsen, K. S. +5 more
Recent observations by instruments aboard the ExoMars Trace Gas Orbiter (TGO) have revealed the seasonal presence of hydrogen chloride ($\text{HCl}$) in the Martian atmosphere. This discovery may have important implications for Martian photochemistry as chlorine species are chemically active, and it may provide a link between the atmosphere and kn…