Search Publications
Large Scale Modulation: View from the Earth Points
Belov, A. V.; Yanke, V. G.; Oleneva, V. A. +1 more
The article reports a review of the current results obtained over the past decade in the study of cosmic ray solar modulation. The analysis of modulation effects was carried out in the isotropic and anisotropic approximations on the data of the ground-based network of detectors and the first data from the PAMELA and AMS-02 magnetic spectrometers. …
Photometric and Spectroscopic Investigations of the Galactic Field RRc Candidates V764 Mon and HY Com
Pál, A.; Sódor, Á.; Benkő, J. M.
By analyzing photometric and spectroscopic time series, we show that the pulsator V764 Mon, assumed to be the brightest RR Lyr star in the sky, is in fact a rapidly rotating δ Sct star with an unusually long dominant period (P1=0.29 d). Our spectroscopy confirmed the binarity of V764 Mon discovered by the Gaia satellite. In the case of …
PROBA2 LYRA Occultations: Thermospheric Temperature and Composition, Sensitivity to EUV Forcing, and Comparisons With Mars
Dominique, Marie; Thiemann, Edward M. B.
A method for retrieving temperature and composition from 150 to 350 km in Earth's thermosphere using total number density measurements made via extreme ultraviolet (EUV) solar occultations by the Project for OnBoard Autonomy 2/Large Yield Radiometer (PROBA2/LYRA) instrument is presented. Systematic and random uncertainties are calculated and found…
On the scaling relations of bulges and early-type galaxies
Pastrav, Bogdan A.
Following from our recent work, we present here a detailed structural analysis of a representative sample of nearby spiral and early-type galaxies (ETGs) taken from the Key Insights on Nearby Galaxies: a Far-Infrared Survey with Herschel/ (KINGFISH) / Spitzer Infrared Nearby Galaxies Survey (SINGS) surveys. The photometric parameters of bulges are…
Astrometric Observations of a Near-Earth Object Using the Image Fusion Technique
Su, Jie; Wang, Jiancheng; Zhang, Yigong +2 more
The precise astrometric observation of small near-Earth objects (NEOs) is an important observational research topic in the astrometric discipline, which greatly promotes multidisciplinary research, such as the origin and evolution of the solar system, the detection and early warning of small NEOs, and deep-space navigation. The characteristics of …
A Revisit to the Optical Starlight Polarization Catalogue by Heiles: Distance Update
Meng, Mei-niang; Sun, Xiao-hui
Starlight polarization serves one of the powerful tools to study magnetic fields in the Galactic interstellar medium. Heiles catalogue contains polarization information for 9286 stars, and is by far the biggest. This catalogue has been extensively used to study the magnetic fields. However, the distance parameters of the stars in this catalogue ar…
Water production rates from SOHO/SWAN observations of six comets: 2017-2020
Bertaux, J. -L.; Combi, M. R.; Shou, Y. +4 more
The Solar Wind ANisotropies (SWAN) all-sky hydrogen Lyman-alpha camera on the SOlar and Heliosphere Observer (SOHO) satellite makes daily images of the entire sky to monitor the three-dimensional distribution of solar wind and solar radiation via its imprint on the stream of interstellar hydrogen that flows through the solar system. In the process…
Fundamental parameters of the massive eclipsing binary HM1 8
Gamen, R.; Barbá, R. H.; Morrell, N. I. +5 more
We present a comprehensive study of the massive binary system HM1 8, based on multi-epoch high-resolution spectroscopy, V-band photometry, and archival X-ray data. Spectra from the OWN Survey, a high-resolution optical monitoring of Southern O and WN stars, are used to analyse the spectral morphology and perform quantitative spectroscopic analysis…
INTEGRAL serendipitous observations of solar and terrestrial X-rays and gamma rays
Churazov, Eugene; Tatischeff, Vincent; Beckmann, Volker +1 more
ESA's INTEGRAL space mission has achieved unique results for solar and terrestrial physics, although spacecraft operations nominally excluded the possibility to point at the Sun or the Earth. The Earth avoidance was, however, exceptionally relaxed for special occultation observations of the Cosmic X-ray Background (CXB), which on some occasions al…
A New Method to Estimate Halo CME Mass Using Synthetic CMEs Based on a Full Ice Cream Cone Model
Moon, Yong-Jae; Lee, Jin-Yi; Cho, Il-Hyun +1 more
In this study, we suggest a new method to estimate the mass of a halo coronal mass ejection (CME) using synthetic CMEs. For this, we generate synthetic CMEs based on two assumptions: (1) the CME structure is a full ice cream cone, and (2) the CME electron number density follows a power-law distribution (ρcme = ρ0r-n