6 papers
Refined reduction and standardisation of 53 years of UBV photometry at Hvar
Hrvoje BožiÄ, Hrvoje Božić, BožiÄ Hrvoje +48
Emission-line stars classified as Be exhibit light and colour variability on various timescales, ranging from days to decades. Their evolution must be constrained by long-term obse…
Modeling brightness temperature of sunspots using ALMA single-dish observations
F. MatkoviÄ, R. BrajÅ¡a, A. O. Benz +5
We model sunspot brightness temperature in the wavelength range 0.3-10mm using the Atacama Large Millimeter/submillimeter Array (ALMA) single-dish measurements together with other…
Modeling brightness temperature of prominences on the solar disk using ALMA single-dish observations
F. MatkoviÄ, R. BrajÅ¡a, A. O. Benz +5
Prominences (PRs) are among the most common solar phenomena, yet their full physical picture, particularly their chromospheric mm emission, remains incomplete. The new Atacama Larg…
BoÅ¡koviÄ's Spherical Trigonometric Solution for Determining the Axis and Rate of Solar Rotation by Observing Sunspots in 1777
Mirko Husak, Roman BrajÅ¡a, Dragan Å poljariÄ +5
In September 1777 RuÄer BoÅ¡koviÄ observed and measured the sun-spot positions to determine the solar rotation elements. In 1785, among other methods, he described a trigonometri…
BoÅ¡koviÄ's method for determining the axis and rate of solar rotation by observing sunspots in 1777
Mirko Husak, Roman BrajÅ¡a, Dragan Å poljariÄ +5
In 1777 RuÄer BoÅ¡koviÄ observed sunspots, determined their positions and the solar rotation elements by his own methods briefly described here. We repeat his calculations of the…
Atacama Large Aperture Submillimeter Telescope (AtLAST) Science: Solar and stellar observations
Sven Wedemeyer, Miroslav Barta, Roman Brajsa +35
Observations at (sub-)millimeter wavelengths offer a complementary perspective on our Sun and other stars, offering significant insights into both the thermal and magnetic composit…