Bibcode
Prieto, M. A.; Fernandez-Ontiveros, J. A.; Bruzual, Gustavo; Burkert, Andreas; Schartmann, Marc; Charlot, Stephan
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 485, Issue 3, p.3264-3276
Fecha de publicación:
5
2019
Número de citas
25
Número de citas referidas
22
Descripción
A panchromatic view of the star-forming ring and feeding process in the
central kpc of the galaxy NGC 1097 is presented. The assembled IR to UV
images at ˜10 pc resolution allow us to characterize the
population of circa 250 clusters in the ring and disentangle the network
of filaments of dust and gas that enshroud and feed them. The ring is a
place of intermittent star bursts over the last 100 Myr. Four major
episodes covering a proto-cluster phase of 11 mid-IR sources at the
molecular clouds core, and two (three) previous bursts with a time
separation of 20-30 Myr are identified. The extinction map of the inner
few kpc resolves NGC 1097's two major dust lanes in bundles of narrow,
<25 pc width, filaments running along the galaxy's bar. As they
approach the ring, some circularize along it, others curve to the centre
to produce a nuclear spiral. We believe these are kpc-scale dust-gas
streamers feeding the ring and the black hole. The total mass in
clusters formed in the ring in the last 100 Myr is \lt 10^7 {M_\odot },
i.e. \lt 1{{ per cent}} of the 109 M⊙ of
molecular gas in the ring; yet, at its current star formation rate,
{˜ }1.8 {M_\odot yr^{-1}}, an order of magnitude more in stellar
mass should have been produced over that period. This means that the
availability of gas in the ring is not the sole star formation driver,
perhaps the rate at which dense gas accumulates in the ring is the key.
Proyectos relacionados
Centros de Galaxias a Escalas de Parsecs y Técnicas de Alta Resolución Espacial
Proyecto enfocado al estudio en el IR del núcleo de las galaxias más cercanas con resoluciones espaciales en el rango de 1 a 10 pc. Estas resoluciones espaciales, accesibles con los grandes telescopios de tierra usando técnicas frontera de observación, son por primera vez comparables a las que se obtienen rutinariamente con HST en el óptico y VLBI
Almudena
Prieto Escudero