Selected the first 15 surveys for 4MOST

The European Southern Observatory (ESO) has selected 15 observing programs for 4MOST, a new spectrograph that will be mounted at the focus of the VISTA telescope (in Chile, image below). 4MOST is a new and advanced fiber-fed facility for spectroscopic surveys that will be able to simultaneously obtain the spectra of approximately 2400 objects on a hexagonal field of view of 4.2 square degrees.

273725535 5051406661572818 2171945018625811863 nThe selected surveys, together with those proposed by the consortium that develops the instrument, will be carried out during the first 5 years of observations between 2024 and 2029. 4MOST will only carry out public surveys and the survey program will be established every five years. 

Among the 15 approved proposals, 3 are led by INAF.
In particular, the galactic survey "The 4MOST Survey of Young Stars" (4SYS) is led by INAF-Osservatorio Astrofisico di Arcetri. With this survey, about 100,000 young stars will be observed at a distance of no more than 500 parsec. The data derived from these observations will allow us to better understand how star clusters form and disperse.

PI: Germano Sacco*, Co-I: Davide Fedele*, Elena Franciosini*, Laura Magrini*, Sofia Randich*.

273696143 5051406514906166 1807829174177367827 n

Distribution of stars to be observed with the survey "The 4MOST Survey of Young Stars (4SYS)". Credits: G. Sacco/INAF.

INAF-OAA participations in selected surveys for 4MOST

4MOST-StePS: a Stellar Population Survey using 4MOST 
(PI: A. Iovino), including Anna Gallazzi* and Stefano Zibetti* (core team), Francesco Belfiore*, Giovanni Cresci*, Filippo Mannucci*.

4MOST survey of dwarf galaxies and their stellar streams (4DWARFS) 
PI: A. Skuladottir**, including Viola Gelli**, Martina Rossi**, Stefania Salvadori**.

4HS: the 4MOST Hemisphere Survey of the Nearby Universe
(PI: Edward Taylor), including Leslie Hunt* (core team)

(PI: R. Ibata), including A. Skuladottir

* INAF-Osservatorio Astrofisico di Arcetri
** Universit√† di Firenze, ass. INAF-Osservatorio Astrofisico di Arcetri

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