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An excess of massive stars in the local 30 Doradus starburst

Schneider, F. R. N., Sana, H., Evans, C. J., Bestenlehner, J. M., Castro, N., Fossati, L., Gräfener, G., Langer, N., Ramírez-Agudelo, O. H., Sabín-Sanjulián, C. , Simón-Díaz, S., Tramper, F., Crowther, P. A., de Koter, A., de Mink, S. E., Dufton, P. L., Garcia, M., Gieles, Mark, Hénault-Brunet, V., Herrero, A., Izzard, Robert, Kalari, V., Lennon, D. J., Maíz Apellániz, J., Markova, N., Najarro, F., Podsiadlowski, Ph., Puls, J., Taylor, W. D., van Loon, J. Th., Vink, J. S. and Norman, C. (2018) An excess of massive stars in the local 30 Doradus starburst Science, 359 (6371). pp. 69-71.

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The 30 Doradus star-forming region in the Large Magellanic Cloud is a nearby analog of large star-formation events in the distant universe. We determined the recent formation history and the initial mass function (IMF) of massive stars in 30 Doradus on the basis of spectroscopic observations of 247 stars more massive than 15 solar masses (Embedded Image). The main episode of massive star formation began about 8 million years (My) ago, and the star-formation rate seems to have declined in the last 1 My. The IMF is densely sampled up to 200 Embedded Image and contains 32 ± 12% more stars above 30 Embedded Image than predicted by a standard Salpeter IMF. In the mass range of 15 to 200 Embedded Image, the IMF power-law exponent is Embedded Image, shallower than the Salpeter value of 2.35.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Schneider, F. R. N.
Sana, H.
Evans, C. J.
Bestenlehner, J. M.
Castro, N.
Fossati, L.
Gräfener, G.
Langer, N.
Ramírez-Agudelo, O. H.
Sabín-Sanjulián, C.
Simón-Díaz, S.
Tramper, F.
Crowther, P. A.
de Koter, A.
de Mink, S. E.
Dufton, P. L.
Garcia, M.
Hénault-Brunet, V.
Herrero, A.
Kalari, V.
Lennon, D. J.
Maíz Apellániz, J.
Markova, N.
Najarro, F.
Podsiadlowski, Ph.
Puls, J.
Taylor, W. D.
van Loon, J. Th.
Vink, J. S.
Norman, C.
Date : 2018
DOI : 10.1126/science.aan0106
Copyright Disclaimer : © The Authors, some rights reserved. This is the authors’ version. The definitive version is published in Science on 5th Jan 2018: Vol. 359, Issue 6371, pp. 69-71 DOI: 10.1126/science.aan0106
Additional Information : Supplementary Materials Materials and Methods Supplementary Text Figs. S1 to S10 Tables S1 to S3 References (37–116) Data S1 to S3
Depositing User : Clive Harris
Date Deposited : 17 Jan 2018 09:42
Last Modified : 06 Jul 2018 02:08

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