Modified median statistics and type Ia supernova data

• Tipo: Artigo em Revista Científica Internacional
• Data: 2002

Autores

Avelino, PP (Autor) FCUP; Martins, CJAP (Autor) Outra; Pinto, P (Autor) Outra

Revista

Título: Astrophysical Journal

Vol. 575

Páginas: 989-995

ISSN: 0004-637X

Editora: American Astronomical Society

Indexação

ISI Web of Knowledge - 11 Citações

Scopus - 11 Citações

Outras Informações

ID Authenticus: P-000-NAN

DOI: 10.1086/341353

Abstract (EN): The median statistic has recently been discussed by Gott et al. as a more reliable alternative to the standard chi(2) likelihood analysis, in the sense that it requires fewer assumptions about the data and is almost as constraining. We apply this statistic to the combined data set of 92 distant Type Ia supernovae currently available and also to a mock SNAP-class data set. We find that the performances of the modified median and chi(2) statistics are comparable, particularly in the latter case. We further extend the work of Gott et al. by modifying the median statistic to account for the number and size of sequences of consecutive points above or below the median. We also comment on how the performance of the statistic depends on the choice of free parameters that one is estimating.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7