Search Publications
On the Nature of Propagating Intensity Disturbances in Polar Plumes during the 2017 Total Solar Eclipse
Madjarska, Maria S.; Lim, Eun-Kyung; Yang, Heesu +8 more
The propagating intensity disturbances (PIDs) in plumes are still poorly understood, and their identity (magnetoacoustic waves or flows) remains an open question. We investigate PIDs in five plumes located in the northern polar coronal hole observed during the 2017 total solar eclipse. Three plumes are associated with coronal bright points, jets, …
Discovery of a Wind-blown Bubble Associated with the Supernova Remnant G346.6-0.2: A Hint for the Origin of Recombining Plasma
Filipović, M. D.; Suzuki, H.; Fukui, Y. +3 more
We report on CO and H I studies of the mixed-morphology supernova remnant (SNR) G346.6-0.2. We find a wind-blown bubble along the radio continuum shell with an expansion velocity of ~10 km s-1, which was likely formed by strong stellar winds from the high-mass progenitor of the SNR. The radial velocities of the CO/H I bubbles at V …
Detection of a high-temperature blackbody hump in black hole spectra - the strongly redshifted annihilation line
Titarchuk, Lev; Seifina, Elena
We detected a so-called high-temperature blackbody (HBB) component, found in the 15-40 keV range, in the broad-band X-ray energy spectra of black hole (BH) candidate sources. A detailed study of this spectral feature is presented using data from five of the Galactic BH binaries, Cyg X-1, GX 339-4, GRS 1915+105, SS 433, and V4641 Sgr in the low/har…
Sr and Ba abundances: Comparing machine-learning with star-by-star analyses. High-resolution re-analysis of suspected LAMOST barium stars
Jorissen, A.; Escorza, A.; Van Winckel, H. +6 more
Context. A new large sample of 895 s-process-rich candidates out of 454 180 giant stars surveyed by LAMOST at a low spectral resolution (R ~ 1800) has been reported by Norfolk et al. (2019, MNRAS, 490, 2219; hereafter N19).
Aims: This study is aimed at confirming the s-process enrichment at the higher resolution (R ~ 86 000) offered by the HE…
Evidence for stellar contamination in the transmission spectra of HAT-P-12b
Pallé, E.; Yan, F.; Chen, G. +4 more
Context. Transmission spectroscopy characterizes the wavelength dependence of transit depth, revealing atmospheric absorption features in planetary terminator regions. In this context, different optical transmission spectra of HAT-P-12b reported in previous studies exhibited discrepant atmospheric features (e.g., Rayleigh scattering and alkali abs…
Bayesian Cross-matching of High Proper-motion Stars in Gaia DR2 and Photometric Metallicities for 1.7 million K and M Dwarfs
Lépine, Sébastien; Medan, Ilija; Hartman, Zachary
We present a Bayesian method to cross-match 5,827,988 high proper-motion Gaia sources ( > 40 mas yr1) to various photometric surveys: Two Micron All Sky Survey, AllWISE data release from the Wide-field Infrared Explorer (WISE) mission, Galaxy Evolution Explorer, Radial Velocity Experiment, Sloan Digital Sky Survey, and Panoramic Surv…
A neural network-based methodology to select young stellar object candidates from IR surveys
Montillaud, J.; Cornu, D.
Context. Observed young stellar objects (YSOs) are used to study star formation and characterize star-forming regions. For this purpose, YSO candidate catalogs are compiled from various surveys, especially in the infrared (IR), and simple selection schemes in color-magnitude diagrams (CMDs) are often used to identify and classify YSOs.
Aims: …
Multi-instrument analysis of far-ultraviolet aurora in the southern hemisphere of comet 67P/Churyumov-Gerasimenko
Feldman, P. D.; Eriksson, A.; Biver, N. +9 more
Aims: We aim to determine whether dissociative excitation of cometary neutrals by electron impact is the major source of far-ultraviolet (FUV) emissions at comet 67P/Churyumov-Gerasimenko in the southern hemisphere at large heliocentric distances, both during quiet conditions and impacts of corotating interaction regions observed in the summe…
Born in a Pair (?): Pisces II and Pegasus III
Garofalo, Alessia; Calura, Francesco; Paris, Diego +5 more
We have used B, V time-series photometry collected with the Large Binocular Telescope to undertake the first study of variable stars in the Milky Way ultra-faint dwarf (UFD) satellites Pisces II and Pegasus III. In Pisces II we have identified an RRab star, one confirmed and a candidate SX Phoenicis star, and a variable with uncertain classificati…
Globular cluster systems of relic galaxies
Chies-Santos, Ana L.; Beasley, Michael A.; Leaman, Ryan +6 more
We analyse the globular cluster (GC) systems of a sample of 15 massive, compact early-type galaxies (ETGs), 13 of which have already been identified as good relic galaxy candidates on the basis of their compact morphologies, old stellar populations and stellar kinematics. These relic galaxy candidates are likely the nearby counterparts of high-red…