Archive for 2017

Resolving 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

Posted December 21, 2017 By grigoris

A 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 […]

New Paper on star clusters in the Small Magellanic Cloud

Posted December 15, 2017 By grigoris

The distribution and ages of star clusters in the Small Magellanic Cloud: Constraints on the interaction history of the Magellanic Clouds T. Bitsakis, R. A. Gonzalez-Lopezlira, P. Bonfini, G. Bruzual, G. Maravelias, D. Zaritsky, S. Charlot, V. H. Ramirez-Siordia We present a new study of the spatial distribution and ages of the star clusters in […]

The first neutron star merger

Posted October 16, 2017 By grigoris

A new era, of multi-messenger astronomy (combining gravitational waves, particles, photons), has been born today. LIGO/VIRGO plus 70 teams around the world announced the first detection of colliding neutron stars, which means that a gravitational wave detection (GW170817) triggered the observations using almost everything available (from gamma rays to radio wavelengths) that identify and follow […]

The last day at Valparaiso

Posted October 3, 2017 By grigoris

I think it had everything: – waking up early to go to the bank, – then go to the university and finalize some aspects of my talk (as a final contribution), – go for lunch with the whole group, – return to the university, – to say goodbye to people, – do the presentation, – […]

A short talk for IFA-UV Monday meetings

Posted October 2, 2017 By grigoris

Every Monday the IFA-UV organizes a meeting that starts with a short (or longer) presentation of 20 mins. The whole process requires the active participation by the students to present the speaker, control, the discussion, while there is also a feedback given by the audience to the speaker. This is a great opportunity for the […]

Extrapolating for the new post-doc position

Posted September 29, 2017 By grigoris

The idea of this post came to me on my second or third day in Chile when I noticed its flag on some boats. As today is my last day at work, perhaps it is the best (and last) opportunity to make a post about it. (So, practically it is either now or never.) My […]

Proper acknowledgments

Posted September 22, 2017 By grigoris

From a friend with a similar interest in martial arts. He noticed the following acknowledgment (by Zeng & Sasselov 2013, PASP, 125, 227): We acknowledge partial support for this work by NASA cooperative agreement NNX09AJ50A (Kepler Mission science team). We would like to thank Michail Petaev and Stein Jacobsen for their valuable comments and suggestions. […]

New paper on the circumstellar environment of MWC 137

Posted September 20, 2017 By grigoris

Resolving the circumstellar environment of the Galactic B[e] supergiant star MWC 137 from large to small scales Michaela Kraus, Tiina Liimets, Cristina E. Cappa, Lydia S. Cidale, Dieter H. Nickeler, Nicolas U. Duronea, Maria L. Arias, Diah S. Gunawan, Mary E. Oksala, Marcelo Borges Fernandes, Grigoris Maravelias, Michel Cure, Miguel Santander-Garcia The Galactic object MWC […]

Tough days the last days

Posted September 18, 2017 By grigoris

A couple of hectic weeks finished on last Friday. After two trips to La Serena to observe from the magnificent facilities at CTIO and LCO (posts still pending since there is an overwhelming amount of photos and videos!), I had an intense week to finalize the paper I am preparing (for some looong time now). […]