Results 41 to 50 of about 8,488 (185)
Confirmation of the Luminous Blue Variable Status of MWC 930
Advances in Astronomy, Volume 2014, Issue 1, 2014., 2014 We present spectroscopic and photometric observations of the emission‐line star MWC 930 (V446 Sct) during its long‐term optical brightening in 2006–2013. Based on our earlier data we suggested that the object has features found in Luminous Blue Variables (LBV), such as a high luminosity (~3 105 L⊙), a low wind terminal velocity (~140 km s−1), and a ...
A. S. Miroshnichenko +17 more
wiley +1 more source
The spectroscopic Hertzsprung-Russell diagram of Galactic massive stars
, 2014 The distribution of stars in the Hertzsprung-Russell diagram narrates their evolutionary history and directly assesses their properties. Placing stars in this diagram however requires the knowledge of their distances and interstellar extinctions, which ...
Castro, N. +5 more
core +1 more source
Is Betelgeuse the Outcome of a Past Merger? [PDF]
, 2020 We explore the possibility that the star alpha Orionis (Betelgeuse) is the outcome of a merger that occurred in a low mass ratio (q = M2/M1 = 0.07 - 0.25) binary system some time in the past hundreds of thousands of years.
Chatzopoulos, E. +3 more
core +4 more sources
Properties of Anomalous and Type II Cepheids in the Small and Large Magellanic Clouds
EPJ Web of Conferences, 2017 The Small Magellanic Cloud (SMC) and Large Magellanic Cloud (LMC) give us the possibility to study individual variable star types in a new way. Literature data provide us with photometric information about objects from the ultraviolet to the infrared ...
Jurkovic Monika I. +1 more
doaj +1 more source
On the Age Distribution of Classical Cepheids in the Galaxy
Astronomische Nachrichten, Volume 346, Issue 5, June 2025.ABSTRACT We revisit the problem of the positive correlation between age and Galactocentric distance seen in Galactic Classical Cepheids, which at first sight may seem counter‐intuitive in the context of inside‐out galaxy formation. To explain it, we use the Besançon Galaxy Model and a simulation of star particles in the Galactic disc coupled with ...
Friedrich Anders +5 more
wiley +1 more source
Chemical and Photometric Evolution Models for Disk, Irregular, and Low Mass Galaxies
Advances in Astronomy, Volume 2014, Issue 1, 2014., 2014 We summarize the updated set of multiphase chemical evolution models performed with 44 theoretical radial mass initial distributions and 10 possible values of efficiencies to form molecular clouds and stars. We present the results about the infall rate histories, the formation of the disk, and the evolution of the radial distributions of diffuse and ...
Mercedes Mollá, Jorge Iglesias Páramo
wiley +1 more source
Journey to the cosmos: Navigating stellar evolution with differential equations
Alifmatika, 2023 Differential equations are a fundamental and versatile mathematical tool that finds widespread application across diverse academic disciplines, from physics and biology to economics and engineering.
Anshuman Jha +3 more
doaj +1 more source
Computer Graphics Forum, Volume 43, Issue 3, June 2024.Abstract The research communities studying visualization and sonification for data display and analysis share exceptionally similar goals, essentially making data of any kind interpretable to humans. One community does so by using visual representations of data, and the other community employs auditory (non‐speech) representations of data.
K. Enge +9 more
wiley +1 more source
Classical and Relativistic Orbital Motions around a Mass‐Varying Body
SRX Physics, Volume 2010, Issue 1, 2010., 2010 I work out the Newtonian and general relativistic effects due to an isotropic mass loss M˙/M of a body on the orbital motion of a test particle around it; the present analysis is also valid for a variation G˙/G of the Newtonian constant of gravitation. Concerning the Newtonian case, I use the Gauss equations for the variation of the elements and obtain
L. Iorio
wiley +1 more source
Estimating Stellar Parameters and Interstellar Extinction from Evolutionary Tracks
Open Astronomy, 2016 Developing methods for analyzing and extracting information from modern sky surveys is a challenging task in astrophysical studies. We study possibilities of parameterizing stars and interstellar medium from multicolor photometry performed in three ...
Sichevsky S., Malkov O.
doaj +1 more source