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The Subaru Seminar is usually held in Room 104 of the Hilo Base Facility, adjacent to the main lobby. Everyone is welcome to attend. If you are interested in giving a seminar, please contact Subaru seminar organizers (Tae-Soo Pyo, Sherry Yeh, Nagayoshi Ohashi) by email : sseminar_at_subaru.naoj.org (please change"_at" to @).

November 20, Wednesday, at 11:00 am

" Hunting relic galaxies in the nearby Universe "

Anna Ferre-Mateu

(Subaru Telescope)


Galaxy evolution theories predict that massive galaxies are transformed over cosmic time through on-going star formation and mergers with other galaxies, but at the same time, a small fraction (<0.1%) should survive untouched till today. However, searches for such relic galaxies, useful windows to explore the early Universe, have been inconclusive to date: galaxies with masses and sizes like those observed at high redshift (M*>10^11 Msun; Re<1.5 kpc) have been found in the local Universe, but their stars are far too young for the galaxy to be a relic galaxy. In this talk, I will present the results from new spectroscopic data for NGC1277, a nearby galaxy that has recently caught the attention of the community due to its super massive black hole. Our analysis shows that NGC1277 fulfills all the criteria to be considered a relic galaxy: it is massive, compact and its star formation history along the structure of the galaxy shows that the stellar populations are uniformly old (>10 Gyr) with no evidence for more recent star formation episodes. Furthermore, the metallicity of their stars is super-solar and extremely alpha enriched, which suggests a very short formation time scale for the bulk of stars of this galaxy. This galaxy is, therefore, a serious candidate to be the first confirmed relic in the nearby Universe.


Seminars are also held at JAC, CFHT, and IfA.



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