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The Signature of the Northern Galactic Center Region in Low-velocity UV Absorption
Fox, Andrew J.; Bordoloi, Rongmon; Ashley, Trisha +1 more
The Galactic Center (GC) is surrounded by plasma lobes that extend up to ~14 kpc above and below the plane. Until now, UV absorption studies of these lobes have only focused on high-velocity components (∣v LSR∣ > 100 km s-1) because low- and intermediate-velocity (LIV) components (∣v LSR∣ < 100 km s-1
Gaia data processing. SEAPipe: The source environment analysis pipeline
Harrison, D. L.; Evans, D. W.; van Leeuwen, F. +3 more
Aims: Our goal is to describe two potential options for the Source Environment Analysis pipeline (SEAPipe) for the Gaia mission. This pipeline will enable the discovery of sources that are new to Gaia, in the sense that they were not found by the on-board detection algorithm. These additional sources (secondaries) are discoverable in the vici…
Optical counterparts of two candidate ultraluminous X-ray sources in NGC 4536
Avdan, S.; Vinokurov, A.; Shablovinskaya, E. S. +7 more
Archival XMM-Newton, Chandra, and Hubble Space Telescope(HST) data have been used to study the X-ray and optical properties of two candidate ultraluminous X-ray sources in NGC 4536. In order to search for potential optical counterparts, relative astrometry between Chandra and HST was improved, and as a result, optical counterparts were detected fo…
The Eruption of 22 April 2021 as Observed by Solar Orbiter: Continuous Magnetic Reconnection and Heating After the Impulsive Phase
Mierla, M.; Zhukov, A. N.; Berghmans, D. +33 more
We report on one of the first solar-eruptive events that was simultaneously observed by three of the remote-sensing instruments onboard Solar Orbiter during the cruise phase. The Extreme Ultraviolet Imager (EUI) observed an eruption on 22 April 2021. The corresponding CME was recorded by the coronagraph Metis. Finally, the Spectrometer/Telescope f…
Measurements of visual double stars with PISCO2 at the Nice 76‑cm refractor in 2013–2014 (new data) and in 2015
Vakili, F.; Rivet, J. -P.; Ling, J. F. +11 more
We present relative astrometric and photometric measurements of visual double stars made in 2013–2015, with PISCO2 installed at the 76‑cm refractor of Côte d'Azur Observatory in Nice (France). Our observing list contains orbital couples as well as double stars whose motion is still uncertain. Most of the observations were done in 2015, but some ot…
Determination of Distance, Extinction, Mass, and Age for Stars in LAMOST DR7
Huang, Yang; Yuan, Haibo; Wang, Jianling +1 more
Large scale spectroscopic surveys such as that using Large-sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) have collected spectra of millions stars in the Milky Way. Utilizing this huge sample of stars to study the assembling history and structure of our Galaxy requires accurate estimates of distance, extinction, age, and mass for ind…
Low-luminosity observation of BeXRB source IGR J21347+
Tobrej, Mohammed; Rai, Binay; Ghising, Manoj +2 more
In this paper, we report the results of the detailed temporal and spectral studies of the BeXRB J21347
Calibration of Uncertainties of the Gaia DR3 Catalog Based on Data on Wide Binary Stars of the Galaxy Field
Kovaleva, D. A.
The catalog of wide binary stars [1], created on the basis of Gaia EDR3 data and including more than a million pairs, was used to analyze Gaia DR3 data obtained independently for their components. It is shown that the spatial heterogeneity of the catalog reflects the Gaia scanning law. The change in the spatial density of binary stars in the catal…
3C 120 Disk/Corona vs. Jet Variability in X-rays
Fedorova, Elena; Del Popolo, Antonio
The 3C120 (Mrk 1506, UGC 03087, Mrk 9014) is a type 1 Seyfert (Sy1)/broad-line radio galaxy (BLRG) with intriguing variable jet activity featuring "dip" and "outburst" phases. Significant X-ray observational datasets have been collected for 3C120 by INTEGRAL, XMM-Newton, SWIFT, Suzaku, and other X-ray observational facilities. The overall X-ray sp…
Solar Orbiter Data-Model Comparison in Venus' Induced Magnetotail
Jarvinen, Riku; Kallio, Esa; Edberg, Niklas J. T. +5 more
We investigate the structure of the Venusian magnetotail utilizing magnetic field and electron density measurements that cover a wide range of distances from the planet, from the first two Solar Orbiter Venus flybys. We examine the magnetic field components along the spacecraft trajectory up to 80 Venus radii down the tail. Even though the magneti…