Properties of the Z =2.73 galaxy, MS1512-CB58

Sara R. Heap, Ivan - Hubeny, Thierry M. Lanz

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

MS1512-cB58 is an z = 2.73 galaxy whose apparent brightness is amplified by 30-50X due to gravitationally lensing. The restframe far-UV spectrum of cB58 that was obtained by Keck-I/LRIS is 'one of the best ultraviolet spectra of a starburst galaxy obtained at any redshift' (Pettini et al., 2000). We have analyzed and modeled the spectrum of this galaxy in order to learn the properties of high-redshift galaxies. We find that our model spectrum is a near match to the observed spectrum of cB58 if the galaxy has a SMC-like metallicity, and has a Salpeter IMF extending up to ∼ 100 M. The spectrum of cB58 also shows many absorption lines formed in a giant, expanding gas shell surrounding the star-forming complex. We show preliminary findings of the properties of the giant HII region based on our CLOUDSPEC model.

Original languageEnglish (US)
Pages (from-to)263-266
Number of pages4
JournalAstrophysics and Space Science
Volume277
Issue numberSUPPL.
DOIs
StatePublished - 2001
Externally publishedYes

Fingerprint

galaxies
starburst galaxies
ultraviolet spectra
metallicity
IMF
brightness
stars
shell
gases
gas

Keywords

  • Cosmology: observations
  • Galaxies: evolution
  • Galaxies: individual (MS1512-cB58)
  • Ultraviolet

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Properties of the Z =2.73 galaxy, MS1512-CB58. / Heap, Sara R.; Hubeny, Ivan -; Lanz, Thierry M.

In: Astrophysics and Space Science, Vol. 277, No. SUPPL., 2001, p. 263-266.

Research output: Contribution to journalArticle

Heap, Sara R. ; Hubeny, Ivan - ; Lanz, Thierry M. / Properties of the Z =2.73 galaxy, MS1512-CB58. In: Astrophysics and Space Science. 2001 ; Vol. 277, No. SUPPL. pp. 263-266.
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AU - Heap, Sara R.

AU - Hubeny, Ivan -

AU - Lanz, Thierry M.

PY - 2001

Y1 - 2001

N2 - MS1512-cB58 is an z = 2.73 galaxy whose apparent brightness is amplified by 30-50X due to gravitationally lensing. The restframe far-UV spectrum of cB58 that was obtained by Keck-I/LRIS is 'one of the best ultraviolet spectra of a starburst galaxy obtained at any redshift' (Pettini et al., 2000). We have analyzed and modeled the spectrum of this galaxy in order to learn the properties of high-redshift galaxies. We find that our model spectrum is a near match to the observed spectrum of cB58 if the galaxy has a SMC-like metallicity, and has a Salpeter IMF extending up to ∼ 100 M⊙. The spectrum of cB58 also shows many absorption lines formed in a giant, expanding gas shell surrounding the star-forming complex. We show preliminary findings of the properties of the giant HII region based on our CLOUDSPEC model.

AB - MS1512-cB58 is an z = 2.73 galaxy whose apparent brightness is amplified by 30-50X due to gravitationally lensing. The restframe far-UV spectrum of cB58 that was obtained by Keck-I/LRIS is 'one of the best ultraviolet spectra of a starburst galaxy obtained at any redshift' (Pettini et al., 2000). We have analyzed and modeled the spectrum of this galaxy in order to learn the properties of high-redshift galaxies. We find that our model spectrum is a near match to the observed spectrum of cB58 if the galaxy has a SMC-like metallicity, and has a Salpeter IMF extending up to ∼ 100 M⊙. The spectrum of cB58 also shows many absorption lines formed in a giant, expanding gas shell surrounding the star-forming complex. We show preliminary findings of the properties of the giant HII region based on our CLOUDSPEC model.

KW - Cosmology: observations

KW - Galaxies: evolution

KW - Galaxies: individual (MS1512-cB58)

KW - Ultraviolet

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