Título

Study of intrinsic properties of HII galaxies at high redshift

Autor

ANA LUISA GONZÁLEZ MORÁN

Colaborador

ELENA KIRILOVSKY TERLEVICH (Asesor de tesis)

Nivel de Acceso

Acceso Abierto

Resumen o descripción

I have selected a sample of 504 HII like-starburst galaxies according to the equivalent

widths in their emission lines in a range of redshift of 0.1 < z < 3.4 from the literature,

in order to assess the validity of the L(HB) - g relation at high redshift and its use

as an accurate distance estimator. The physical parameters for the sample at high

redshift, within the uncertainties, are consistent with the ones for the HIIGx at low

redshift. This suggests that the physical properties for HIIGx at low and high redshift

are similar.

By combining our sample at high redshift with the local sample of HIIGx from Chávez

et al. (2014), I find an evident flattening that starts at approximately log(g) = 1:8 km

s-1 in the L(HB) - g relation. This flattening has an interesting application since it

leads to a kind of standard candle for those HIIGx with log(g) > 1:8 km s-1. This

flattening or the existence of an upper limit in the luminosity of HIIGx has not been

reported before. Applying this new HIIGx standard candle method to the high redshift

sample we obtain good restrictions on the cosmological parameters solution space.

The combination of our sample at high redshift with the local sample of 156 (HIIGx

and GEHRs) dramatically improves the constraints on the plane (nm, w0), which are

consistent with the results from SNeIa.

These results are surprisingly good considering the high uncertainties in the data at

high redshift, therefore we expect better constraints on the plane (nm, w0) using high

quality data from high resolution spectrographs at 8 m class telescopes.

Editor

Instituto Nacional de Astrofísica, Óptica y Electrónica

Fecha de publicación

julio de 2015

Tipo de publicación

Tesis de maestría

Formato

application/pdf

Idioma

Inglés

Audiencia

Público en general

Sugerencia de citación

Gonzalez-Moran A.L.

Repositorio Orígen

Repositorio Institucional del INAOE

Descargas

819

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