on my professional endeavors...
Year: <span>2015</span>

Year: 2015

Winter is … here!

Winter-time observations in Ondrejov are bad and good at the same time. ‘Bad’ since the weather can be really nasty (clouds, humidity, rain, snow, …) so you can get nothing all night long or something for a short amount of time (‘spending’ a lot of time just waiting of course). …

New paper on Magellanic Supergiants – Disk tracing for B[e] supergiants in the Magellanic Clouds

Disk tracing for B[e] supergiants in the Magellanic Clouds G. Maravelias, M. Kraus, A. Aret B[e] supergiants are evolved massive stars with a complex circumstellar environment. A number of important emission features probe the structure and the kinematics of the circumstellar material. In our survey of Magellanic Cloud B[e] supergiants …

The equivalent of 1 erg

A very common unit of energy in Astronomy is erg. There are stellar sources that emit up to 1040 erg/s (or even more for galaxies). But, how could we understand “how much” erg is? An interesting and funny example is given in the Wikipedia [1]: “An erg is approximately the …

June conferences: Physics of Evolved Stars and 12th Hellenic Astronomical Conference

June 2015 has been quite busy as I participated in two conferences: The Physics of Evolved Stars (Nice, France; June 8-12, 2015) – poster contribution Title: “Disk tracing for B[e] supergiants in the Magellanic Clouds” Abstract: “The B[e] supergiants are an important short-lived transition phase in the life of massive …

Back to (my) school!

On Thursday 14th of May 2015 I had the unique opportunity to give a talk about Astronomy at the high school I graduated from in Aigaleo (Athens, Greece). As I have moved away from Aigaleo since 2007 and my visits in Athens are scarce the least, it is difficult to …

New domain name !

The new domain is official: maravelias.info ! Please update your bookmarks (if you have any…!). All the content is there, but if something is missing or (too obviously) broken let me know. But why change it? When I decided to self-host my site and use a domain I though that …