Results 11 to 20 of about 4,942 (197)
The Astrophysical JournalAccurate age and mass determinations for young pre-main-sequence stars are made challenging by the presence of large-scale starspots. We present results from a near-infrared spectroscopic survey of 10 T-Tauri Stars in Taurus-Auriga that characterize spot-
Facundo Pérez Paolino +3 more
doaj +2 more sources
Subduction, Stratosphere, Starspots, and Sushi
Eos, 2017 Highlights from AGU’s joint meeting with the Japan Geophysical Union.
Jenny Lunn +4 more
openalex +2 more sources
Probing Starspot Dynamics on the Active M Dwarf TIC 272272592: A Multiyear TESS Study
The Astrophysical JournalWe present an analysis of temporal starspot evolution and its distribution on an active rapid rotator ( P _rot = 1.22 days), TIC 272272592, using high-precision time-series photometry from the Transiting Exoplanet Survey Satellite spanning over 3 yr. The
Rajib Kumbhakar +4 more
doaj +2 more sources
Differential Rotation of CoRoT Stars and a Kepler Binary Star from Starspot Transit Mapping [PDF]
The Astrophysical JournalWhile direct magnetic field measurements are rare for slowly rotating stars, spots observed during planetary transits provide a potential indicator of magnetic activity on stellar surfaces.
Adriana Valio +2 more
doaj +2 more sources
Reading the Sky. From Starspots to Spotting Stars
Nordina: Nordic Studies in Science Education, 2016 Urban Eriksson
doaj +3 more sources
Massive Stars as the Radiant Queens of the Universe—The Case of ζ Puppis
Universe, 2022 Since the Cosmic Dawn, massive stars have been playing a crucial role as the chemical recycling engines of galaxies that enable the birth of new stars and planetary systems, not only through the strong winds that they exhibit during their relatively ...
Tahina Ramiaramanantsoa +1 more
doaj +1 more source
Clinical and Translational Discovery, Volume 2, Issue 4, December 2022., 2022 Backgournd Variability is essential for the efficient functioning of multiple systems in nature. Systems do not function according to rigid rules, easy to determine. The reasons for such behaviour directly affect the design and efficient energy utilization.
Yaron Ilan
wiley +1 more source
On the lithium abundance of the visual binary components ξ Boo A (G8V) and ξ Boo B (K5V)
Astronomische Nachrichten, Volume 343, Issue 9-10, November-December 2022., 2022 Abstract A spectroscopic investigation of the lithium resonance doublet in ξ Boo A and ξ Boo B in terms of both abundance and isotopic ratio is presented. We obtained new R = 130,000 spectra with a signal‐to‐noise ratio (S/N) per pixel of up to 3200 using the 11.8 m LBT and PEPSI.
Klaus G. Strassmeier, Matthias Steffen
wiley +1 more source
Astronomische Nachrichten, Volume 343, Issue 8, October 2022., 2022 Abstract We present a study of the activity‐rotation relation for M dwarf stars, using new X‐ray data from the ROentgen Survey with an Imaging Telescope Array (eROSITA) on board the Russian Spektrum‐Roentgen‐Gamma mission (SRG), combined with photometric rotation periods from the Transiting Exoplanet Survey Satellite (TESS). The stars used in this work
E. Magaudda, B. Stelzer, St. Raetz
wiley +1 more source
Progress report on the monitoring active late-type stars in 2005/2006 and the analysis of V523 Cas [PDF]
Serbian Astronomical Journal, 2006 We present the light curve analysis of late-type binary V523 Cas for the season 2005. The spot has been revealed on the secondary. According to theoretical considerations, the spot appeared to be hotter than the surrounding photosphere and located at ...
Zboril M., Đurašević G.
doaj +1 more source