Star formation outside the elliptical galaxy NGC2865

We have searched for young stellar complexes\ud around the elliptical galaxy NGC2865.\ud We find them in a ring of HI around the\ud galaxy. Using the Multi-Slit Imaging Spectroscopy\ud Technique (MSIS), we detected a total\ud of seven Hα emitters in the south part of\ud the tidal tail of the galaxy NGC2865. These\ud regions are young sources with stellar masses\ud in the range 4x103M⊙ to 2x106 M⊙, overlapping\ud the location of the low density intergalactic\ud HI gas, where the probability to form stars\ud is expected to be low. For one of the intergalactic\ud HII regions we estimated a solar oxygen\ud abundance, 12 + log(O/H) ∼ 8.7. Given\ud these proprieties, the regions are considered\ud young star forming regions, born in-situ from\ud a pre-enriched gas which has been removed\ud from the host galaxies in a merger event

GeMS, the path toward AO facility

GeMS, the Gemini South MCAO System, has now been in regular operation since mid-2013 with the imager instrument GSAOI. We review the performance obtained during this past year as well as some of its current limitations. While in operation, GeMS is still evolving to push them back and is currently in the path of receiving two major upgrades which will allow new exciting science cases: a new natural guide star wavefront sensor called NGS2 and a replacement of the current 50W laser. We are also actively moving along the path of further deeper integration with the future AO-fed instruments, we present our first preliminary results of astrometric and spectrometric calibrations with diverse Gemini instruments using an internal calibration source. We finally report our efforts to make GeMS a more robust instrument with the integration of a vibration rejection feature and a more user-friendly AO system as well with advanced gain optimization automatization

GeMS, the path toward AO facility

GeMS, the Gemini South MCAO System, has now been in regular operation since mid-2013 with the imager instrument GSAOI. We review the performance obtained during this past year as well as some of its current limitations. While in operation, GeMS is still evolving to push them back and is currently in the path of receiving two major upgrades which will allow new exciting science cases: a new natural guide star wavefront sensor called NGS2 and a replacement of the current 50W laser. We are also actively moving along the path of further deeper integration with the future AO-fed instruments, we present our first preliminary results of astrometric and spectrometric calibrations with diverse Gemini instruments using an internal calibration source. We finally report our efforts to make GeMS a more robust instrument with the integration of a vibration rejection feature and a more user-friendly AO system as well with advanced gain optimization automatization

An infusion of new blood using the Toptica laser with GeMS: results of the commissioning and science performance

International audienc