Search Publications
Updated fundamental parameters of the old open cluster NGC 188 based on G a i a
Gao, Xinhua; Fang, Dan
This paper revisits fundamental properties of the old open cluster NGC 188 based on more reliable cluster members in
How long can luminous blue variables sleep? A long-term photometric variability and spectral study of the Galactic candidate luminous blue variable MN 112
Gvaramadze, V. V.; Karpov, S. V.; Kniazev, A. Y. +1 more
Luminous blue variables (LBVs) are massive stars that show strong spectral and photometric variability. The questions of what evolutionary stages they represent and what exactly drives their instability are still open, and thus it is important to understand whether LBVs without significant ongoing activity exist, and for how long such dormant LBVs…
Arrival Time Estimates of Earth-Directed CME-Driven Shocks
Shanmugaraju, A.; Gopalswamy, N.; Suresh, K.
We report on the travel times of 19 interplanetary (IP) shocks driven by Earth-directed coronal mass ejections (CMEs) that occurred from 2010 to 2017. We track the shocks ahead of CMEs using the graduated cylindrical shell (GCS) model constructed from multiple-view observations from the Solar TErrestrial RElations Observatory (STEREO) and Solar an…
The Second Catalog of Interplanetary Network Localizations of Konus Short-duration Gamma-Ray Bursts
Mitrofanov, I.; Hurley, K.; Yamaoka, K. +72 more
We present the catalog of InterPlanetary Network (IPN) localizations for 199 short-duration gamma-ray bursts (sGRBs) detected by the Konus-Wind (KW) experiment between 2011 January 1 and 2021 August 31, which extends the initial sample of IPN-localized KW sGRBs to 495 events. We present the most comprehensive IPN localization data on these events,…
Spatial Structures in the Globular Cluster Distribution of Fornax Cluster Galaxies
Zezas, Andreas; Fabbiano, Giuseppina; Paolillo, Maurizio +3 more
We report the discovery of statistically significant spatial structures in the projected two-dimensional distributions of Globular Cluster (GC) systems of 10 galaxies that are among the brightest in the Fornax Cluster. We use a catalog of GCs extracted from the Hubble Space Telescope Advanced Camera for Surveys Fornax Cluster Survey imaging data. …
Flow patterns of Jupiter's south polar region
Hansen, C. J.; Bolton, S.; Peach, D. +11 more
Previous studies of Jupiter's wind patterns revealed the southernmost two prograde jets at 58°S and 64°S (planetocentric), which we designate as the S5 and S6 jets, respectively, but the jets and the wind patterns further poleward were not well defined. The Juno mission has provided the first opportunity to study the South Polar Region (SPR). Here…
A Comprehensive Study of the Young Cluster IRAS 05100+3723: Properties, Surrounding Interstellar Matter, and Associated Star Formation
Zavagno, A.; Samal, M. R.; Ojha, D. K. +13 more
We present a comprehensive multiwavelength investigation of a likely massive young cluster "IRAS 05100+3723" and its environment with the aim to understand its formation history and feedback effects. We find that IRAS 05100+3723 is a distant (~3.2 kpc), moderate-mass (~500 M ⊙), young (~3 Myr) cluster with its most massive star being an…
Observations and Modeling of the Opposition Surges of the Icy Moons of Saturn Based on Cassini Visual Infrared Mapping Spectrometer Data
Buratti, B. J.; Hendrix, A. R.; Dalba, P. A. +5 more
Observations of the opposition surges on the main moons of Saturn (Mimas, Enceladus, Tethys, Dione, Rhea, and Iapetus) during Cassini's prime and extended missions are reduced and analyzed. The main data set comes from the Visual Infrared Mapping Spectrometer (VIMS) with wavelength coverage in the visible and near-infrared out to 3.60 µm, co…
Optical polarization signatures of black hole X-ray binaries
Piirola, Vilppu; Poutanen, Juri; Veledina, Alexandra +7 more
Polarimetry provides an avenue for probing the geometry and physical mechanisms producing optical radiation in many astrophysical objects, including stellar binary systems. We present the results of multiwavelength (BVR) polarimetric studies of a sample of historical black hole X-ray binaries, observed during their outbursts or in the quiescent (o…
Multiple variability time-scales of the early nitrogen-rich Wolf-Rayet star WR 7
Koenigsberger, G.; Hamann, W. -R.; Estrada-Dorado, S. +7 more
We present the analysis of the optical variability of the early, nitrogen-rich Wolf-Rayet (WR) star WR 7. The analysis of multisector Transiting Exoplanet Survey Satellite (TESS) light curves and high-resolution spectroscopic observations confirm multiperiodic variability that is modulated on time-scales of years. We detect a dominant period of 2.…