In the Astronomer’s Telegram #11448 [1] it is announced that a very bright (almost 1st magnitude) transient object is found between the Lagoon and the Trifid nebulae. No other object has been found in the region and the source itself was not visible some days earlier. Within less than an hour later a second follow […]
Astronomy Archive
Mixing a transient object with … Mars!
By grigoris | Filed in AstronomySeminar talk at NOA
By grigoris | Filed in AstronomyAs I am waiting my flight to Heraklion, I thought that I should post the talk that I gave earlier today at the National Observatory of Athens, Greece: “B[e] Supergiants: a missing part from the massive star puzzle?” Abstract: Massive stars affect strongly the insterstellar medium through their intense stellar winds and their rich chemically […]
Proposal brainstorming …
By grigoris | Filed in AstronomyFrom our previous meeting.
IRAF’s identify error – center not found
By grigoris | Filed in AstronomyDuring the last few days I have struggled a bit with the wavelength calibration of some long-slit spectra. When using the identify task of IRAF I found that I could select (“m”ark) only some of the lines, without any clear indication why the rest were not recognized (some were indeed stronger but others were equal […]
New position at FORTH and UoC
By grigoris | Filed in AstronomySince October 2017 I have been affiliated with the Department of Physics at the University of Crete, but last week I started working officially as a post-doc with Andreas Zezas. The position is directly affiliated with the Foundation for Research and Technology – Hellas (FORTH), and in particular with the Institute of Electronic Structure and […]
A new Institute for Astronomy in Crete
By grigoris | Filed in AstronomyFinally after many years of delays and unfortunate events a new institute focusing solely in Astronomy is founded as part of the Foundation for Research and Technology – Hellas (FORTH). This is the successful outcome of a continuous effort by the very active astronomy group at the University of Crete. Congratulations to the group and […]
Our work on star clusters of the SMC as a Nature highlight
By grigoris | Filed in AstronomyOur recent work on the identification of star clusters in the Small Magellanic Cloud (SMC), following the initial work on the Large Magellanic Cloud, was selected by Nature as a research highlight [1]. The distribution of the star clusters and their ages can reveal us how the two galaxies interact and when. It seems that […]
Jobs in Astronomy by Peblo
By grigoris | Filed in AstronomyHow easy is it really to find a job in Astronomy? To find out check the following illustration by by Peblo, describing job applications:
New paper on the circumstellar environment of the B[e] supergiant LHA 120-S 35
By grigoris | Filed in AstronomyResolving the clumpy circumstellar environment of the B[e] supergiant LHA 120-S 35 Andrea F. Torres, Lydia S. Cidale, Michaela Kraus, María L. Arias, Rodolfo H. Barbá, Grigoris Maravelias, Marcelo Borges Fernandes B[e] supergiants (SGs) are massive post-main-sequence stars, surrounded by a complex circumstellar (CS) environment. The aim of this work is to investigate the structure […]
A short talk on GW170817 at UoC
By grigoris | Filed in AstronomyA few weeks ago couple of months ago I gave a small talk during the journal club of the Astronomy group at the University of Crete (on 20/Oct/2017) about the most recent gravitational wave detection (GW170817) corresponding to a neutron star merger. As I have been involved in a couple of papers [1] it was […]
