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astro-ph.SR2026
The forgotten bright star: Theta Eridani as a millenary stellar transient observed by Hipparchus, Ptolemy and al-Sufi
Idel Waisberg, Boaz Katz
Theta Eridani is a V=2.9 star that was nonetheless reported as one of the thirteen brightest stars in the night sky by both Ptolemy in his Almagest (137 AD) and by al-Sufi in his T…
astro-ph.SR2026
Confirming Nunki as the closest core collapse progenitor candidate to the Sun
Idel Waisberg, Boaz Katz
We have recently suggested that Nunki=Sigma Sagittarii is the closest core collapse progenitor candidate to the Sun based on a VLTI/GRAVITY observation that unveiled it as a $6.5+6…
astro-ph.SR2026
Upgrading Alpha Crucis to a seven star system. Discovery of Bb and orbital misalignment
Idel Waisberg, Boaz Katz
Alpha Crucis is the closest very high multiplicity massive star to the Sun. At its heart is the binary (A) + (B) Cru, which combined…