4DWARFS is a 4MOST community survey!
The 4DWARFS survey, guided by Dr. Asa Skuladottir, has been selected by ESO as one of the 15 4MOST community surveys. Congratulations Asa!
Geppina Coppola Prize for Viola Gelli!
Viola Gelli has been awarded the first edition of the Geppina Coppola Prize for her Master Thesis on “The stellar populations of high-redshift dwarf galaxies” .
Welcome Ioanna, see you Giulia & Andrea!
Ioanna Koutsouridou joined the NEFERTITI team for a 3yrs postdoctoral position. Welcome to Florence Ioanna!!! Our former Master students, Giulia Pagnini and Andrea Saccardi are moving to Paris (GEPI Department) to start their PhD. Good luck Giulia & Andrea and Continue reading Welcome Ioanna, see you Giulia & Andrea!
Welcome David!
Zero-metallicity hypernovae do exist!
We report the detection of an ultra metal-poor star in the Sculptor dwarf galaxy, AS0039. Its unique abundance pattern indicates that AS0039 formed out of material that was enriched by a ~20 M⊙ progenitor star with an unusually high explosion energy. Continue reading Zero-metallicity hypernovae do exist!
Assistant Professorship for Asa Skuldottir
Our own Asa Skuladottir is now Assistant Professor (RTD-A) at the Physics and Astronomy Department of the University of Florence. Congratulations Asa!!! Continue reading Assistant Professorship for Asa Skuldottir
ESO Hypatia Colloquium for Viola Gelli!
Our second year PhD student Viola Gelli has been selected as speaker for the Hypatia Colloquia organized by ESO. Congrats Viola! On July 27, 2021 (3pm) she will talk about High-z Lyman Break Galaxies with JWST: parallel observations of dwarf satellites. Save the date! Continue reading ESO Hypatia Colloquium for Viola Gelli!
Job opportunities: work with us!
We offer two post-doctoral research fellowships in Near-Field cosmology funded by the ERC-starting grant NEFERTITI (deadline December 31, 2020) and one post-doctoral research fellowship co-funded by NEFERTITI and by the Italian MIUR through a PRIN grant (deadline January 4, 2021). All appointments are offered for 3 years. Continue reading Job opportunities: work with us!
High-z dwarf galaxy satellites
Our study of the dwarf satellites of z~ 6 Lyman Break galaxies shows that, even in such extremely dense environments, internal supernovae feedback is the key mechanism regulating the dwarf galaxy evolution and leading to their quenching. In all these small satellites, furthermore, the star formation rates are surprisingly high, ensuring that JWST will be able to detect them. Continue reading High-z dwarf galaxy satellites
The timescale of neutron star mergers
For the first time, we combine all the available observational evidence for rapid (r-) neutron-capture process elements in the Milky Way and its dwarf galaxy satellites to show that the data can only be explained if there are (at least) two distinct r-process sites: a quick source with timescales comparable to core-collapse supernovae and a delayed source with characteristic timescales ≳ 4 Gyr. The delayed r-process source most probably originates in neutron star mergers, as the timescale fits well with that estimated for GW170817. Continue reading The timescale of neutron star mergers