Pismis 24‐1: The Stellar Upper Mass Limit Preserved | Zendy

J. Maíz Apellániz | Zendy; N. R. Walborn | Zendy; N. Morrell | Zendy; Virpi Sinikka Niemelä | Zendy; Edmund Nelan | Zendy

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Pismis 24‐1: The Stellar Upper Mass Limit Preserved

Author(s) -

J. Maíz Apellániz,

N. R. Walborn,

N. Morrell,

Virpi Sinikka Niemelä,

Edmund Nelan

Publication year - 2007

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/513098

Subject(s) - limit (mathematics) , physics , astrophysics , stellar mass , star (game theory) , star cluster , cluster (spacecraft) , binary number , mass segregation , stellar evolution , astronomy , star formation , stars , mathematics , mathematical analysis , computer science , programming language , arithmetic

Is there a stellar upper mass limit? Recent statistical work seems toindicate that there is and that it is in the vicinity of 150 solar masses. Inthis paper we use HST and ground-based data to investigate the brightestmembers of the cluster Pismis 24, one of which (Pismis 24-1) was previouslyinferred to have a mass greater than 200 solar masses, in apparent disagreementwith that limit. We determine that Pismis 24-1 is composed of at least threeobjects, the resolved Pismis 24-1SW and the unresolved spectroscopic binaryPismis 24-1NE. The evolutionary zero-age masses of Pismis 24-1SW, theunresolved system Pismis 24-1NE, and the nearby star Pismis 24-17 are allapproximately 100 solar masses, very large but under the stellar upper masslimit.Comment: 16 pages, 3 figures, accepted in ApJ, second astro-ph version reflects changes suggested by refere

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