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Modeling a Coronal Mass Ejection from an Extended Filament Channel. II. Interplanetary Propagation to 1 au
Scolini, Camilla; Lynch, Benjamin J.; Palmerio, Erika +5 more
We present observations and modeling results of the propagation and impact at Earth of a high-latitude, extended filament channel eruption that commenced on 2015 July 9. The coronal mass ejection (CME) that resulted from the filament eruption was associated with a moderate disturbance at Earth. This event could be classified as a so-called "proble…
Supervised machine learning on Galactic filaments. Revealing the filamentary structure of the Galactic interstellar medium
Arzoumanian, D.; Zavagno, A.; Elia, D. +11 more
Context. Filaments are ubiquitous in the Galaxy, and they host star formation. Detecting them in a reliable way is therefore key towards our understanding of the star formation process.
Aims: We explore whether supervised machine learning can identify filamentary structures on the whole Galactic plane.
Methods: We used two versions of UN…
A Candidate Relativistic Tidal Disruption Event at 340 Mpc
Chandra, Poonam; Hallinan, Gregg; Laha, Sibasish +13 more
We present observations of an extreme radio flare, VT J024345.70-284040.08, hereafter VT J0243, from the nucleus of a galaxy with evidence for historic Seyfert activity at redshift z = 0.074. Between NRAO Very Large Array (VLA) Sky Survey observations in 1993 to VLA Sky Survey observations in 2018, VT J0243 rose from a ~ GHz radio luminosity of ν …
Global survey of star clusters in the Milky Way. VII. Tidal parameters and mass function
Kovaleva, D. A.; Piskunov, A. E.; Just, A. +2 more
Aims: We built Galactic open star cluster mass functions (CMFs) for different age sub-samples and spatial locations in the wider solar neighbourhood. Here, we present a simple cluster formation and evolution model to reproduce the main features of the CMFs.
Methods: We used an unbiased working sample of 2227 clusters of the Milky Way Sta…
An In-depth Look at TOI-3884b: A Super-Neptune Transiting an M4Dwarf with Persistent Starspot Crossings
Kobulnicky, Henry A.; Kowalski, Adam F.; Cochran, William D. +25 more
We perform an in-depth analysis of the recently validated TOI-3884 system, an M4-dwarf star with a transiting super-Neptune. Using high-precision light curves obtained with the 3.5 m Apache Point Observatory and radial velocity observations with the Habitable-zone Planet Finder, we derive a planetary mass of ${32.6}_{-7.4}^{+7.3}\,{M}_{\oplus }$ a…
North Polar Spur/Loop I: gigantic outskirt of the Northern Fermi bubble or nearby hot gas cavity blown by supernovae?
Lallement, Rosine
Radio continuum, microwave and gamma-ray images of the Milky Way reveal a conspicuous, loop-like structure that fills almost half of the northern Galactic hemisphere, called Loop I. The interior of Loop I is shining in soft X-rays, and its eastern base is a bright, elongated structure dubbed the North Polar Spur (NPS). After 40 years of debates, t…
Deciphering the unusual stellar progenitor of GRB 210704A
Troja, E.; Im, M.; Butler, N. R. +16 more
GRB 210704A is a burst of intermediate duration (T90 ~ 1-4 s) followed by a fading afterglow and an optical excess that peaked about 7 d after the explosion. Its properties, and in particular those of the excess, do not easily fit into the well-established classification scheme of gamma-ray bursts (GRBs) as being long or short, leaving …
Testing multiband (G, GBP, GRP, B, V, and TESS) standard bolometric corrections by recovering luminosity and radii of 341 host stars
Bakış, V.; Eker, Z.
Main-sequence bolometric corrections (BC) and a standard BC-Teff relation are produced for TESS wavelengths using published physical parameters and light ratios from SED models of 209 detached double-lined eclipsing binaries. This and previous five-band (Johnson B, V, Gaia G, GBP, GRP) standard BC-Teff r…
Ultracool dwarfs in Gaia DR3
Recio-Blanco, A.; de Laverny, P.; Bailer-Jones, C. A. L. +36 more
Context. Previous Gaia data releases offered the opportunity to uncover ultracool dwarfs (UCDs) through astrometric, rather than purely photometric, selection. The most recent, the third data release (DR3), offers in addition the opportunity to use low-resolution spectra to refine and widen the selection.
Aims: In this work we use the Gaia DR…
The white dwarf binary pathways survey - IX. Three long period white dwarf plus subgiant binaries
Gänsicke, B. T.; Koester, D.; Rebassa-Mansergas, A. +8 more
Virtually all binaries consisting of a white dwarf with a non-degenerate companion can be classified as either close post-interaction systems (with orbital periods of a few days or less), or wide systems (with periods longer than decades), in which both components have effectively evolved as single stars. Binaries with periods between these two ex…