Search Publications
Influence of the interstellar magnetic field and 11-year cycle of solar activity on the heliopause nose location
Bladek, Piotr; Ratkiewicz, Romana
Context. The heliosphere is formed by the interaction between the solar wind (SW) plasma emanating from the Sun and a magnetised component of local interstellar medium (LISM) inflowing on the Sun. A separation surface called the heliopause (HP) forms between the SW and the LISM.
Aims: In this article, we define the nose of the HP and investig…
X-Ray and Ultraviolet Flares on AT Microscopii Observed by AstroSat
Banerjee, D.; Kuznetsov, A. A.; Chandrashekhar, K. +1 more
We present observations of the active M-dwarf binary AT Mic (dM4.5e+dM4.5e) obtained with the orbital observatory AstroSat. During 20 ks of observations, in the far-ultraviolet (130-180 nm) and soft X-ray (0.3-7 keV) spectral ranges, we detected both quiescent emission and at least five flares on different components of the binary. The X-ray flare…
An Initial Analysis of a Strongly Lensed QSO Candidate Identified by LAMOST
Chen, Y. H.; Tang, M. Y.; Tu, H. +1 more
From 2011 to 2021, LAMOST has released a total of 76,167 quasar data. We try to search for gravitationally lensed QSOs by limiting coordinate differences and redshift differences of these QSOs. The name, brightness, spectrum, photometry and other information of each QSO will be visually checked carefully. Special attention should be paid to check …
StarHorse results for spectroscopic surveys with Gaia EDR3: Chrono-chemical populations in the solar vicinity, the genuine thick disk, and young alpha-rich stars (Corrigendum)
Valentini, M.; Anders, F.; Chiappini, C. +16 more
The revised catalog is only available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (ftp://130.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/676/C6
ALMA ACA Detection of Submillimeter Emission Associated with the Western Hot Spot of the Radio Galaxy Pictor A
Nakagawa, Takao; Baba, Shunsuke; Isobe, Naoki +4 more
In order to investigate the far-infrared excess detected from the western hot spot of the radio galaxy Pictor A with the Herschel observatory, submillimeter photometry is performed with the Atacama Compact Array (ACA) of the Atacama Large Millimeter/submillimeter Array at Band 8 with the reference frequency of 405 GHz. A submillimeter source is di…
MEGASTAR - III. Stellar parameters and data products for DR1 late-type stars
Mollá, M.; Cardiel, N.; Gil de Paz, A. +5 more
MEGARA (Multi Espectrógrafo en Gran Telescopio Canarias de Alta Resolución para Astronomía) is the optical integral-field and multi-object spectrograph at the Gran Telescopio Canarias. We have created MEGASTAR , an empirical library of stellar spectra obtained using MEGARA at high resolution, $R=20\, 000$ (full width at half-maximum), available in…
The GALANTE Photometric Project: First results and the MUDEHaR extension
Maíz Apellániz, J.; Holgado, G.; Alfaro, E.
GALANTE is an optical (3000-9000 Å) photometric survey with seven intermediate/narrow filters that has been covering the northern Galactic Plane and some adjacent regions since 2016 using the Javalambre T80 telescope (P.I.s Emilio J. Alfaro & Jesús Maíz Apellániz). Originally designed to identify the majority of the early-type massive stars wi…
Planetary Exploration of Mercury With BepiColombo and Prospects of Studying Venus During Its Cruise Phase
Benkhoff, Johannes; Zender, Joe
Mercury and Venus are key planets for the understanding of the evolution of our solar system and therefore also for the question of how the Earth and life formed. In the case of Mercury, it is mainly because of its position among the planets. It is the planet closest to the Sun and experiences the harsh environment of the Sun the most. Venus is mo…
About the multiplicity of M dwarfs
Amado, P. J.; Caballero, J. A.; Reiners, A. +8 more
Stellar multiplicity is a common consequence of the stellar formation process. Low-mass stars are the prime constituent of the nearby stellar population, with late-type accounting for the majority of the hydrogen-fusing objects in the Solar neighborhood. The CARMENES input catalogue of M dwarfs (Carmencita) is a comprehensive and homogeneous sampl…
TYC 1417-891-1 and TYC 1478-742-1: Eclipsing Variable Stars. The Gaia EDR3 and TESS Photometric Data
Gigoyan, K. K.; Gigoyan, K. S.; Kostandyan, G. R. +3 more
Based on the TESS (Transiting Exoplanet Survey Satellite) phase dependent light curves, we confirm the eclipsing type variability nature for two G-type dwarfs: TYC 1417-891-1 and TYC 1478-742-1. Both objects show EA (Algol-type) light curves morphology. Orbital period for TYC 1417-891-1 is P ≈ 8.0 day and for TYC 1478-742-1, P ≈ 13.6 day. We prese…