No stellar age gradient inside supergiant shell LMC 4

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dc.creatorBraun, Jochen M.
dc.creatorBomans, Dominik J.
dc.creatorWill, Jean-Marie
dc.creatorde Boer, Klaas S.
dc.date1997-08-08
dc.date.accessioned2026-07-07T02:23:58Z
dc.date.available2026-07-07T02:23:58Z
dc.descriptionThe youngest stellar populations of a 'J'-shaped region (400 pc strip E-W across LH 77 and 850 pc S-N) inside the supergiant shell (SGS) LMC 4 (with a diameter of 1.4 kpc) have been analysed with CCD photometry in B,V passbands. Isochrone fitting to the colour-magnitude diagrams yields ages in the range from 9 Myr to 16 Myr without correlation with the distance to the LMC 4 centre. We construct the luminosity function and the mass function of five regions to ensure that projection effects don't mask the results. The slopes lie in the expected range (gamma in [0.22;0.41] and Gamma in [-1.3;-2.4] respectively, with the Salpeter value of Gamma = -1.35). After our calculations a total of 5-7 10^3 supernovae has dumped the energy of 10^54.5 erg over the past 10 Myr into LMC 4, in fact enough to tear the original star-forming cloud apart in the time span between 5 and 8 Myr after the starformation burst, initiated by a large scale triggering event. We conclude that LMC 4 can have been formed without a contribution from stochastic self-propagating star formation (SSPSF).
dc.description9 pages, LaTeX (with style files: epsf, l-aa), incl. 4 PostScript figures, see http://www.astro.uni-bonn.de/~jbraun/diploma.html Accepted by A&A (Main Journal)
dc.identifierhttps://arxiv.org/abs/astro-ph/9708081
dc.identifierhttp://arxiv.org/abs/astro-ph/9708081
dc.identifierAstron.Astrophys. 328 (1997) 167-174
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/11458
dc.subjectAstrophysics
dc.titleNo stellar age gradient inside supergiant shell LMC 4
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