2 citations · 2 across the 2 of their papers we have counts for
8 papers
Identification of additional young nearby runaway stars based on Gaia data release 2 observations and the lithium test
R. Bischoff, M. Mugrauer, G. Torres +4
Runaway stars are characterised by their remarkably high space velocities, and the study of their formation mechanisms has attracted considerable interest. Young, nearby runaway st…
On the nature of the candidate T-Tauri star V501 Aurigae
M. Vaňko, G. Torres, L. Hambálek +18
We report new multi-colour photometry and high-resolution spectroscopic observations of the long-period variable V501 Aur, previously considered to be a weak-lined T-Tauri star bel…
KIC011764567: An evolved object showing substantial flare-activity
M. Kitze, A. A. Akopian, V. Hambaryan +2
We intensively studied the flare activity on the stellar object KIC011764567. The star was thought to be solar type, with a temperature of K, $\log(g) =…
Tycho Brahe, Abu Mashar, and the comet beyond Venus (ninth century A.D.)
Ralph Neuhaeuser, Paul Kunitzsch, Markus Mugrauer +2
From his observations of the A.D. 1572 super-nova and the A.D. 1577 comet, Tycho Brahe concluded that such transient celestial objects are outside the Earth's atmosphere, and he qu…
Interpretation of the historic Yemeni reports of supernova SN 1006: early discovery in mid-April 1006 ?
Ralph Neuhaeuser, Dagmar Neuhaeuser, Wafiq Rada +3
The recently published Yemeni observing report about SN 1006 from al-Yamani clearly gives AD 1006 Apr (mid-Rajab 396h) as first observation date. Since this is about 1.5…
Sunspot numbers based on historic records in the 1610s - early telescopic observations by Simon Marius and others
Ralph Neuhaeuser, Dagmar L. Neuhaeuser
Hoyt & Schatten (1998) claim that Simon Marius would have observed the sun from 1617 Jun 7 to 1618 Dec 31 (Gregorian calendar) all days, except three short gaps in 1618, but would…