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Remote Sensing of Coronal Forces during a Solar Prominence Eruption
Thompson, B. J.; DeVore, C. R.; Uritsky, V. M.
We present a new methodology-the Keplerian Optical Dynamics Analysis (KODA)-for quantifying the dynamics of erupting magnetic structures in the solar corona. The technique involves adaptive spatiotemporal tracking of propagating intensity gradients and their characterization in terms of time-evolving Keplerian areas swept out by the position vecto…
RT Vir - A Semiregular Star With Maser Emission: Mathematical Modelling of Optical Variability
Andronov, I. L.; Kudashkina, L. S.
The historical light curve of the semiregular pulsating star RT Vir (SRb, Sp M8III) with a maser emission is analyzed based on the AAVSO database. The star is extensively studied in the IR, radio and the optical ranges. The value of the period from the CCVS (155d) conflicts with some observational data. Signs of a systematic variability were also …
Gaia-supported re-discovery of a remarkable weak line quasar from a variability and proper motion survey
Scholz, Ralf-Dieter; Meusinger, Helmut
We demonstrate that VPMS J170850.95+433223.7 is a weak line quasar (WLQ) which is remarkable in several respects. It was already classified as a probable quasar two decades ago, but with considerable uncertainty. The non-significant proper motion and parallax from the Gaia Early Data Release 3 have solidified this assumption. Based on previously u…
Determination of the Physical Parameters of AGNs in Seyfert 1 Galaxies LEDA 3095839 and VII Zw 244 Based on Spectropolarimetric Observations
Shablovinskaya, Elena; Piotrovich, Mikhail; Malygin, Eugene +2 more
Here we present the detailed investigation of AGNs in two Seyfert 1 galaxies, LEDA 3095839 and VII Zw 244. Both of them were observed within the photometric reverberation mapping project in Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS), during which we earlier obtained the SMBHs masses. After that, both galaxies we…
Chemical environments of 6.7 GHz methanol maser sources
Pandian, Jagadheep D.; Paulson, Sonu Tabitha
6.7 GHz methanol masers are the brightest of class II methanol masers that are regarded as excellent signposts in the formation of young massive stars. We present here a molecular line study of 68 6.7 GHz methanol maser hosts chosen from the Methanol Multibeam survey catalogue, which have MALT90 data available. We performed (1) pixel-by-pixel stud…
TIC 452991707 and TIC 452991693 as a Candidate Sextuple System with Three Eclipsing Binaries
Zasche, P.; Henzl, Z.
We present the discovery of a rare system detected in the TESS data showing three different eclipsing-like signals. TIC 452991707 and TIC 452991693 seem to be the second such system on the sky, whose two components separated about 16" are gravitationally bounded, or comprise a co-moving pair. The three periods detected from the TESS data are: P
Data analysis in space physics: My experience and lessons learned
Kronberg, Elena A.
The specific area of investigation in this perspective is data analysis in space physics. This paper is intended to be useful for those who start working with observations in space physics, especially with a focus on charged particle measurements. I forward lessons I learned regarding the data analysis such as calibration, statistics and machine l…
Red dwarf contact binary V0627 Hydrae
Zhu, Li-Ying; Liu, Liang; Xu, Hu-Shan +2 more
New complete light curves in B, V, RC, and IC bands for the short-period eclipsing binary V0627 Hya (period shorter than 0.22 d) are presented. From the longer wavelength to the shorter one, the amplitudes of the light variation become larger. The different height of the successive maxima in each band's light curve could be s…
Comparing the Performance of a Solar Wind Model from the Sun to 1 au Using Real and Synthetic Magnetograms
Yeates, Anthony R.; Cohen, Ofer; Munoz-Jaramillo, Andres +1 more
The input of the solar wind models plays a significant role in accurate solar wind predictions at 1 au. This work introduces a synthetic magnetogram produced from a dynamo model as an input for magnetohydrodynamics simulations. We perform a quantitative study that compares the space weather modeling framework (SWMF) results for the observed and sy…
An approximation to determine the source of the WOW! Signal
Caballero, Alberto
In this paper it is analysed which of the thousands of stars in the WOW! Signal region could have the highest chance of being the real source of the signal, providing that it came from a star system similar to ours. A total of 66 G and K-type stars are sampled, but only one of them is identified as a potential Sun-like star considering the availab…