Subaru Seminars



This Month






Site Map

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 : (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.

Copyright (c) 1999-2000 Subaru Telescope, NAOJ. All rights reserved.