Aims: The non-uniform surface temperature distribution of rotating active stars is routinely mapped with the Doppler imaging technique. Inhomogeneities in the...
Approximate Lambda-Operators working at optimum convergence rate. I - Theory and application to hydrostatic atmospheres
In this paper the approximate Lambda-Operator (ALO) developed by Olson, Auer and Buchler (OAB, 1986) is inspected from a more mathematical standpoint and...
Aquila X-1: a low-inclination soft X-ray transient
We have obtained I-band photometry of the neutron star X-ray transient Aql X-1 during quiescence. We find a periodicity at 2.487 cycles d^-1, which we interpret...
Archaeoastronomy and Conflict: On the Orientation of Prehistoric Funerary Monuments in Western Sahara
A variety of Prehistoric dry-stone monuments are ubiquitous in Western Sahara, a region delimited by the boundaries of the former Spanish colony. With either...
Archaeoastronomy and the alleged “Stonehenge calendar”
In a recent Antiquity article, Darvill (2022) proposed that the mid third-millennium BC Stage 2 sarsen settings of Stonehenge (comprising the Trilithon...
Archaeoastronomy in Bronze Age Sites of La Mancha (Spain)
We present archaeoastronomical results of an interdisciplinary project to study Bronze Age sites of the socalled Cultura de las Motillas in the Spanish region...
Archaeoastronomy and cultural astronomy are often considered synonyms, but they actually express different concepts, the former being a sub-discipline of the...
Archaeoastronomy: A Sustainable Way to Grasp the Skylore of Past Societies
If astronomy can be understood as the contemplation of the sky for any given purpose, we must realize that possibly all societies throughout time and in all...