Results 1 to 10 of about 412 (157)
Extracting information from the Hertzsprung-Russell diagram: An eye-tracking study [PDF]
Physical Review Physics Education Research, 2022 The Hertzsprung-Russell diagram (HRD) is a fundamental representation in stellar physics. It contains information about key properties of stars and allows inferences about stellar evolution.
Ronja Langendorf +2 more
doaj +2 more sources
On Stellar Evolution in a Neutrino Hertzsprung–Russell Diagram [PDF]
The Astrophysical Journal, 2020 We explore the evolution of a select grid of solar metallicity stellar models from their pre-main-sequence phase to near their final fates in a neutrino Hertzsprung–Russell diagram, where the neutrino luminosity replaces the traditional photon luminosity.
Ebraheem Farag +4 more
doaj +4 more sources
Semi-analytical Formulas for the Hertzsprung-Russell Diagram [PDF]
Serbian Astronomical Journal, 2008 The absolute visual magnitude as function of the observed color (B-V), also named Hertzsprung-Russell diagram, can be described through five equations; that when calibrated stars are available means eight constants.
Zaninetti, L.
doaj +5 more sources
Designs for Learning, 2019 In this paper we are interested in the relationship between disciplinary knowledge and its representation. We carry out a social semiotic analysis of a central tool used in astronomy—the Hertzsprung-Russell (H-R) diagram—in order to highlight its ...
John Airey, Urban Eriksson
doaj +3 more sources
Electron Acceleration to MeV Energies at Jupiter and Saturn. [PDF]
J Geophys Res Space Phys, 2018 Abstract The radiation belts and magnetospheres of Jupiter and Saturn show significant intensities of relativistic electrons with energies up to tens of megaelectronvolts (MeV). To date, the question on how the electrons reach such high energies is not fully answered.
Kollmann P +7 more
europepmc +2 more sources
Erratum: “On Stellar Evolution in a Neutrino Hertzsprung–Russell Diagram” (2020, ApJ, 893, 133) [PDF]
The Astrophysical JournalEbraheem Farag +4 more
doaj +2 more sources
Three-dimensional supernova simulation of SN 1987A progenitor with implications for multi-messenger signals [PDF]
EPJ Web of Conferences, 2022 Recently a new progenitor model for SN 1987A has been constructed. This progenitor model is based on a slow-merger of 14 M⊙ and 9 M⊙ stars and it satisfies most of the observational constraints such as red-toblue evolution, lifetime, total mass and ...
Nakamura Ko
doaj +1 more source
First Observations With a GNSS Antenna to Radio Telescope Interferometer
Radio Science, Volume 58, Issue 8, August 2023., 2023 Abstract We describe the design of a radio interferometer composed of a Global Navigation Satellite Systems (GNSS) antenna and a Very Long Baseline Interferometry radio telescope. Our eventual goal is to use this interferometer for geodetic applications including local tie measurements.
J. Skeens +7 more
wiley +1 more source
Pegasus W: An Ultrafaint Dwarf Galaxy Outside the Halo of M31 Not Quenched by Reionization
The Astrophysical Journal, 2023 We report the discovery of an ultrafaint dwarf (UFD) galaxy, Pegasus W, located on the far side of the Milky Way–M31 system and outside the virial radius of M31.
Kristen B. W. McQuinn +5 more
doaj +1 more source
Astronomische Nachrichten, Volume 342, Issue 7-8, Page 960-974, August-October 2021., 2021 Abstract Runaway stars are characterized by their remarkably high space velocities, and the study of their formation mechanisms has attracted considerable interest. Young, nearby runaway stars are the most favorable for identifying their place of origin, and for searching for possible associated objects such as neutron stars.
Richard Bischoff +6 more
wiley +1 more source