Contatto di riferimento: Donatella Romano
Partecipanti: Sebastian Kamann (Institut fuer Astrophysik, Univ. Goettingen, DE)
Abstract
In my talk, I want to highlight the unique potential of integral-fieldspectroscopy in the study of Galactic globular clusters. Whiletraditional spectroscopy has revealed many intriguing details abouttheir nature, such as the existence of multiple populations, it islimited to observations of the relatively few isolated stars in acluster. I will show how the combination of integral field spectroscopyand deblending techniques known from crowded field photometry canovercome this limitation and significantly increase the number ofspectroscopically accessible stars.A science case that particularly benefits from this improvement is thesearch for intermediate mass black holes (IMBHs). The existence of theseobjects is still a matter of significant debate, in large parts becauseof the observational challenges involved. Velocities for many stars inthe highly crowded cluster centres must be measured to constrain thepresence of an IMBH. I will summarize our previous efforts to search forthese objects and also highlight the role MUSE will play in this fieldin the future. This new spectrograph allows us to obtain samples of upto 10000 stars per cluster in less than an hour of telescope time.Thanks to the unprecedented sample sizes, it also enables us to pursue arange of other science cases, ranging from the distribution of binaryperiods in the clusters to the study of stellar populations. See you on Thursday in the seminars’ room, floor -1, via Ranzani 1, on time at 14h.
Next seminars:
- Tuesday November 17th, at 14:00 Young-Wook Lee (Center for Galaxy Evolution Research & Department of Astronomy, Yonsei University, Seoul, Korea)
- Thursday November 19th, at 14:00 Matteo Guainazzi (Astro-H ESA Science Operation Center & Astro-H JAXA Operation Office)
- Thursday November 26th, at 14:00 TBD
The complete list of seminars is available at: http://davide2.bo.astro.it/?page_id=4531
The organizers of seminars: