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Demography of Stellar Radio Population within 500 pc: A VLASS-Gaia DR3 Study
Narang, Mayank; Tyagi, H.; Shridharan, B. +5 more
In this work, we have carried out a systematic analysis of the Very Large Array Sky Survey (VLASS) quick look catalogs together with Gaia DR3 to identify the optical counterparts of 3 GHz radio emitters within 500 pc to obtain a homogeneous statistical sample of stellar radio sources. We have identified distinct populations of 3 GHz emitters acros…
Hα Emission and H II Regions at the Locations of Recent Supernovae in Nearby Galaxies
Leroy, Adam K.; Chevance, Mélanie; Glover, Simon C. O. +22 more
We present a statistical analysis of the local, ≈50–100 pc scale, Hα emission at the locations of recent (≤125 yr) supernovae (SNe) in nearby star-forming galaxies. Our sample consists of 32 SNe in 10 galaxies that are targets of the PHANGS-MUSE survey. We find that 41% (13/32) of these SNe occur coincident with a previously identified H II region…
A New Rarity Assessment of the "Disk of Satellites": The Milky Way System Is the Exception Rather Than the Rule in the ΛCDM Cosmology
Yoon, Suk-Jin; Paudel, Sanjaya; Moon, Jun-Sung +2 more
The majority of satellite galaxies around the Milky Way (MW) show disk-like distributions (the disk of satellites; DoS), which is a small-scale problem of the lambda cold dark matter cosmology. The conventional definition of the MW-like DoS is a satellite system with a minor-to-major axis ratio (c/a) lower than the MW's c/a value of 0.181. Here, w…
Multipoint study of the rapid filament evolution during a confined C2 flare on 28 March 2022, leading to eruption
Krucker, Säm; Veronig, Astrid M.; Dissauer, Karin +5 more
Aims. This study focuses on the rapid evolution of the solar filament in active region 12975 during a confined C2 flare on 28 March 2022, which finally led to an eruptive M4 flare 1.5 h later. The event is characterized by the apparent breakup of the filament, the disappearance of its southern half, and the flow of the remaining filament plasma in…
Typing supernova remnant G352.7-0.1 using XMM-Newton X-ray observations
Vink, Jacco; Zhou, Ping; Mao, Junjie +4 more
G352.7-0.1 is a mixed-morphology (MM) supernova remnant (SNR) with multiple radio arcs and has a disputed supernova origin. We conducted a spatially resolved spectroscopic study of the remnant with XMM-Newton X-ray data to investigate its explosion mechanism and explain its morphology. The global X-ray spectra of the SNR can be adequately reproduc…
Ensemble X-ray variability of optically selected QSOs: dependence on black hole mass and Eddington ratio
Georgakakis, A.; Salvato, M.; Buchner, J. +7 more
Although flux variability is one of the defining properties of accretion flows on to supermassive black holes, its dependence on physical parameters such as the mass of the compact object and the Eddington ratio remains under discussion. In this paper, we address this issue using the structure function statistic to measure the variability at X-ray…
Do Solar Energetic Particle (SEP) Events Influence the Formation of the V0 Layer in the Venusian Ionosphere?
Choudhary, R. K.; Imamura, T.; Sánchez-Cano, Beatriz +2 more
This study investigates the potential impact of Solar Energetic Particles (SEPs) on the V0 layer of the Venus ionosphere. Electron density profiles obtained from radio occultation experiments conducted by the Venus Express (VEX) and Akatsuki missions were utilized for this purpose. Background data from the Analyzer of Space Plasma and E…
The Dark Energy Camera Magellanic Clouds Emission-line Survey
White, Richard L.; Rest, Armin; Blair, William P. +7 more
We have used the Dark Energy Camera (DECam) on the CTIO Blanco 4 m telescope to perform a new emission-line survey of the Large Magellanic Cloud (LMC) using narrowband Hα and [S II] filters in addition to a continuum band to create pure emission-line images. We refer to this new survey as DeMCELS, to distinguish it from the earlier Magellanic Clou…
How Common can the Origin of Clusters Cha I, Cha II, ϵ Cha and η Cha be?
Bobylev, V. V.; Bajkova, A. T.
The trajectories of the groupings η Cha, ϵ Cha and Cha I, Cha II, constructed backward in time, have been studied. We concluded that the hypothesis about the joint formation of all four of these clusters from one molecular cloud cannot be completely excluded. However, 10–15 Myr ago, all these four clusters were located at approximately the same he…
Double white dwarf binary population in MOCCA star clusters: Comparisons with observations of close and wide binaries
Giersz, M.; Belloni, D.; Hypki, A. +3 more
There could be a significant population of double white dwarf binaries (DWDs) inside globular clusters (GCs); however, these binaries are often too faint to be individually observed. We have utilized a large number GC models evolved with the Monte Carlo Cluster Simulator (MOCCA) code to create a large statistical dataset of DWDs. These models incl…