000002112 001__ 2112
000002112 005__ 20160701171659.0
000002112 0247_ $$2DOI$$a10.1093/mnras/stv141
000002112 037__ $$aASTROimport-269
000002112 100__ $$aRubele, S.
000002112 245__ $$aThe VMC survey - XIV. First results on the look-back time star formation rate tomography of the Small Magellanic Cloud
000002112 260__ $$c2015
000002112 520__ $$aWe analyse deep images from the VISTA survey of the Magellanic Clouds in the YJ{K_s} filters, covering 14 deg2 (10 tiles), split into 120 subregions, and comprising the main body and Wing of the Small Magellanic Cloud (SMC). We apply a colour-magnitude diagram reconstruction method that returns their best-fitting star formation rate SFR(t), age-metallicity relation (AMR), distance and mean reddening, together with 68 per cent confidence intervals. The distance data can be approximated by a plane tilted in the East-West direction with a mean inclination of 39°, although deviations of up to ±3 kpc suggest a distorted and warped disc. After assigning to every observed star a probability of belonging to a given age-metallicity interval, we build high-resolution population maps. These dramatically reveal the flocculent nature of the young star-forming regions and the nearly smooth features traced by older stellar generations. They document the formation of the SMC Wing at ages 0.2 Gyr and the peak of star formation in the SMC Bar at ˜40 Myr. We clearly detect periods of enhanced star formation at 1.5 and 5 Gyr. The former is possibly related to a new feature found in the AMR, which suggests ingestion of metal-poor gas at ages slightly larger than 1 Gyr. The latter constitutes a major period of stellar mass formation. We confirm that the SFR(t) was moderately low at even older ages. 
000002112 700__ $$a Girardi, L.
000002112 700__ $$a Kerber, L.
000002112 700__ $$a Cioni, M.-R. L.
000002112 700__ $$a Piatti, A. E.
000002112 700__ $$a Zaggia, S.
000002112 700__ $$a Bekki, K.
000002112 700__ $$a Bressan, A.
000002112 700__ $$a Clementini, G.
000002112 700__ $$a de Grijs, R.
000002112 700__ $$a Emerson, J. P.
000002112 700__ $$a Groenewegen, M. A. T.
000002112 700__ $$a Ivanov, V. D.
000002112 700__ $$a Marconi, M.
000002112 700__ $$a Marigo, P.
000002112 700__ $$a Moretti, M.-I.
000002112 700__ $$a Ripepi, V.
000002112 700__ $$a Subramanian, S.
000002112 700__ $$a Tatton, B. L.
000002112 700__ $$a van Loon, J. T.
000002112 773__ $$c639-661$$i1$$pMonthly Notices of the Royal Astronomical Society$$v449$$y2015
000002112 85642 $$ahttp://esoads.eso.org/abs/2015MNRAS.449..639R
000002112 905__ $$apublished in
000002112 980__ $$aREFERD