Probable detection of an eruptive filament from a superflare on a solar-type star
Sign Up to like & getrecommendations! Published in 2021 at "Nature Astronomy"
DOI: 10.1038/s41550-021-01532-8
Abstract: Solar flares are often accompanied by filament/prominence eruptions (~10 4 K and ~10 10−11 cm −3 ), sometimes leading to coronal mass ejections that directly affect the Earth’s environment 1 , 2 . ‘Superflares’ are… read more here.
Keywords: mass; mass ejection; coronal mass; filament ... See more keywords
History of the solar-type protostar IRAS 16293–2422 as told by the cyanopolyynes
Sign Up to like & getrecommendations! Published in 2017 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201629506
Abstract: Context. Cyanopolyynes are chains of carbon atoms with an atom of hydrogen and a CN group on either side. They are detected almost everywhere in the interstellar medium (ISM), as well as in comets. In… read more here.
Keywords: iras 16293; envelope; 16293 2422; abundance ... See more keywords
C/O vs. Mg/Si ratios in solar type stars: The HARPS sample
Sign Up to like & getrecommendations! Published in 2018 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201730743
Abstract: Aims. We present a detailed study of the Mg/Si and C/O ratios and their importance in determining the mineralogy of planetary companions. Methods. Using 499 solar-like stars from the HARPS sample, we determine C/O and… read more here.
Keywords: harps sample; mass; solar type; low mass ... See more keywords
Possible evidence of induced repetitive magnetic reconnection in a superflare from a young solar-type star
Sign Up to like & getrecommendations! Published in 2020 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201936819
Abstract: We report the detection of multiple quasi-periodic pulsations (QPPs) observed during the flaring activity of KIC 8414845, a young, active solar-type star observed by the Kepler mission launched by NASA. We analyzed the QQP signal… read more here.
Keywords: solar type; type star; reconnection; magnetic reconnection ... See more keywords
Superflares and variability in solar-type stars with TESS in the Southern hemisphere
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa923
Abstract: Superflares on solar-type stars have been a rapidly developing field ever since the launch of Kepler. Over the years, there have been several studies investigating the statistics of these explosive events. In this study, we… read more here.
Keywords: type stars; solar type; southern hemisphere; superflares variability ... See more keywords
Theoretical oscillation frequencies for solar-type dwarfs from stellar models with 〈3D〉-atmospheres
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx2226
Abstract: We present a new method for replacing the outermost layers of stellar models with interpolated atmospheres based on results from 3D simulations, in order to correct for structural inadequacies of these layers. This replacement is… read more here.
Keywords: theoretical oscillation; frequencies solar; solar type; asteroseismology ... See more keywords
Spectroscopic orbits of nearby solar-type dwarfs – II.
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx3272
Abstract: Several nearby solar-type dwarfs with variable radial velocity were monitored to find their spectroscopic orbits. First orbital elements of 15 binaries (HIP 12144, 17895, 27970, 32329, 38636, 39072, 40479, 43004, 73700, 79234, 84696, 92140, 88656,… read more here.
Keywords: spectroscopic orbits; solar type; type dwarfs; nearby solar ... See more keywords
Detection of methyl isocyanate (CH3NCO) in a solar-type protostar
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx915
Abstract: We report the detection of the prebiotic molecule CH3NCO in a solar-type protostar, IRAS16293-2422 B. A significant abundance of this species on the surface of the comet 67P/Churyumov-Gerasimenko has been proposed, and it has recently… read more here.
Keywords: detection; ch3nco; solar type; type protostar ... See more keywords
Is the Sun a solar-type star?
Sign Up to like & getrecommendations! Published in 2017 at "Science"
DOI: 10.1126/science.357.6347.159-a
Abstract: Stellar Activity The Sun's activity, including sun-spot activity, varies on an 11-year cycle driven by changes in its magnetic field. Other nearby solar-type stars have their own cycles, but the Sun does not seem to… read more here.
Keywords: type star; solar type; sun; type ... See more keywords
Cycles on the Solar-type Stars and Cooler Dwarfs
Sign Up to like & getrecommendations! Published in 2019 at "Geomagnetism and Aeronomy"
DOI: 10.1134/s0016793219070089
Abstract: Features of the development of activity cycles in the solar-type stars and fast-rotating cool dwarfs have been considered for 65 stars observed in some decades. Cycles with duration of 7–18 years compared to the solar… read more here.
Keywords: solar type; cooler dwarfs; stars cooler; cycles solar ... See more keywords