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Radio multifrequency observations of Abell 781 with the WSRT
Venturi, T.; Dallacasa, D.; Bernardi, G. +4 more
The Main galaxy cluster in the Abell 781 system is undergoing a significant merger and accretion process with peripheral emission to the north and south-eastern flanks of the merging structure. Here we present a full polarimetric study of this field, using radio interferometric data taken at 21 and 92 cm with the Westerbork Synthesis Radio Telesco…
The Advanced Spectral Library: The Evolution of Chromospheric Wind Characteristics from Noncoronal to Hybrid Giant Stars
Carpenter, Kenneth G.; Nielsen, Krister E.; Airapetian, Vladimir S. +1 more
The Hubble Space Telescope (HST)/Space Telescope Imaging Spectrograph treasury program Advanced Spectral Library enables investigations of the characteristics and dynamics of the wind and chromosphere of cool stars using high-quality spectral data. This paper shows how the wind features change with spectral class when transferring across the Linsk…
Kronberger 55: A candidate for end-dominated collapse scenario
Pandey, Rakesh; Sharma, Saurabh; Dewangan, Lokesh +5 more
Using optical photometric observations from 1.3-m Devasthal Fast Optical Telescope and deep near-infrared (NIR) photometric observations from TANSPEC mounted on 3.6-m Devasthal Optical Telescope, along with the multi-wavelength archival data, we present our study of open cluster Kronberger 55 to understand the star-formation scenario in the region…
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