Results 51 to 60 of about 12,394 (217)
Spectropolarimetry of O supergiants [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 We present medium-resolution spectropolarimetry at high signal-to-noise ratio of the Hα emission line of 20 O-type supergiants. Five stars (25 per cent) of the sample show a statistically significant change in polarization through the line. We combine our Hα data with new K-band spectropolarimetry and archival low-resolution optical spectropolarimetry ...
Tim J. Harries +2 more
openaire +1 more source
Semi-analytical formulas for the Hertzsprung-Russell Diagram [PDF]
, 2008 The absolute visual magnitude as function of the observed colour (B-V), also named Hertzsprung-Russell diagram can be described through five equations; that in presence of calibrated stars means eight constants.
Zaninetti, Lorenzo
core +3 more sources
, 2013 We present high spectral resolution (R = 30000) spectroscopic observations of the SiO fundamental lines near 8.1 micron in 16 bright red giants and red supergiants using VLT/VISIR.
Ohnaka, Keiichi
core +1 more source
Physical Properties of Red Supergiants [PDF]
New Astronomy Reviews, 2010 Red supergiants (RSGs) are an evolved He-burning phase in the lifetimes of moderately high mass (10 - 25 solar mass) stars. The physical properties of these stars mark them as an important and extreme stage of massive stellar evolution, but determining these properties has been a struggle for many years. The cool extended atmospheres of RSGs place them
openaire +3 more sources
Infrared Model Spectra for Evolving Red Supergiants [PDF]
Journal of Astronomy and Space Sciences, 1993 The space and ground based infrared spectra of red supergiants are modeled and arranged in order of their evolutionary status with their theoretical model parameters. The chemical compositions of the dust shells around red supergiants are affected by the
Kyung-Won Suh
doaj
Open Astronomy, 2017 Ongoing studies of different groups of stars result in improving our knowledge of their fundamental parameters and evolutionary status. Also, they result in finding new phases of stellar evolution, which require theoretical explanation. At the same time,
Miroshnichenko Anatoly S. +9 more
doaj +1 more source
Strategic Management Journal, Volume 47, Issue 6, Page 1671-1729, June 2026.Abstract Research Summary We study how the entry of a rival platform affects the strategies of the incumbent's complementors. The latter face a trade‐off: While the entry threatens their benefits from indirect network effects, it also allows them to escape intense within‐platform competition.
Johannes Loh, Ambre Elsas‐Nicolle
wiley +1 more source
Genesis and reservoir preservation mechanism of 10 000‐m ultradeep dolomite in Chinese craton basin
Deep Underground Science and Engineering, Volume 4, Issue 3, Page 354-381, September 2025.Potential exploration target stratum of 10 000‐m ultradeep dolomite in Sichuan Basin and Tarim Basin, China. Abstract The 10 000‐m ultradeep dolomite reservoir holds significant potential as a successor field for future oil and gas exploration in China's marine craton basin.
Guangyou Zhu +8 more
wiley +1 more source
Literacy, Volume 59, Issue 2, Page 165-176, May 2025.Abstract Research strongly supports the use of narrative videogames in the literacy/English classroom. However, for many teachers, incorporating videogames into their teaching practice is highly challenging. This article offers new insights into the potential of videogames as a pedagogical tool for literacy/English by exploring the barriers that ...
Jen Aggleton +3 more
wiley +1 more source
Sedimentology, Volume 72, Issue 3, Page 734-762, April 2025.Abstract This study offers new insights into the internal architecture of shallow marine carbonate sediments deposited in an epeiric sea formed on a broadly flooded passive margin continental shelf. The Ullayah Member of the Late Jurassic Hanifa Formation is exposed along the Tuwaiq Mountain Escarpment in Central Saudi Arabia and serves as an example ...
Pankaj Khanna +5 more
wiley +1 more source