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UV continuum spectroscopy of a 6L∗ z=5.5 starburst galaxy

(2005) ASTROPHYSICAL JOURNAL. 630(2). p.L137-L140
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Abstract
We have obtained a high S/ N ( 22.3 hr integration) UV continuum VLT FORS2 spectrum of an extremely bright (z(850) = 24.3) z = 5.515 +/- 0.003 star- forming galaxy ( BD38) in the field of the z = 1.24 cluster RDCS 1252.9 - 2927. From HST Advanced Camera for Surveys imaging, this object was selected as a potential z similar to 6 Lyman break galaxy ( LBG) based on its red i(775) -z(850) = 1.5 color. This object shows substantial continuum ( 0.41 +/- 0.02 mu Jy at 1300 angstrom) and low- ionization interstellar absorption features typical of LBGs at lower redshift A ( z similar to 3); this is the highest redshift LBG confirmed via metal- absorption spectral features. The equivalent widths of the absorption features are similar to z similar to 3 strong Ly alpha absorbers. No noticeable Ly alpha emission was detected (F <= 1.4 x 10(-18) ergs cm (-2) s (-1), 3 sigma). This object is at most amplified 0.3 mag from gravitational lensing by the foreground cluster. The delensed half- light radius of this object is 1.6 kpc ( 0 ".25), and the star formation rate derived from the rest- frame UV luminosity is SFRUV = 38h(0.7)(-2) M-circle dot yr (-1) corrected for dust extinction). In terms of recent determinations of the z similar to 6 UV luminosity function, this object appears to be 6L(*). The Spitzer IRAC fluxes for this object are 23.3 and 23.2 AB mag ( delensed) in the 3.6 and 4.5 mu m channels, respectively, implying a mass of ( 1 - 6) x 10(10) M-circle dot from population synthesis models. This galaxy is brighter than any confirmed z similar to 6 i- dropout to date in the band, and in the 3.6 and 4.5 mu m channels, and is the most z (850) massive starbursting galaxy known at z > 5.
Keywords
LYMAN-BREAK GALAXIES, FRAME ULTRAVIOLET-SPECTRA, ULTRA-DEEP-FIELD, STAR-FORMATION, SPACE-TELESCOPE, ADVANCED CAMERA, Z-APPROXIMATE-TO-6, RDCS-1252.9-2927, Z-SIMILAR-TO-6, DENSITY, galaxies : high-redshift, galaxies : individual (J1252-5224-4599), galaxies : starburst

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MLA
Dow-Hygelund, CC, BP Holden, RJ Bouwens, et al. “UV Continuum Spectroscopy of a 6L∗ Z=5.5 Starburst Galaxy.” ASTROPHYSICAL JOURNAL 630.2 (2005): L137–L140. Print.
APA
Dow-Hygelund, C., Holden, B., Bouwens, R., van der Wel, A., Illingworth, G., Zirm, A., Franx, M., et al. (2005). UV continuum spectroscopy of a 6L∗ z=5.5 starburst galaxy. ASTROPHYSICAL JOURNAL, 630(2), L137–L140.
Chicago author-date
Dow-Hygelund, CC, BP Holden, RJ Bouwens, Arjen van der Wel, GD Illingworth, A Zirm, M Franx, et al. 2005. “UV Continuum Spectroscopy of a 6L∗ Z=5.5 Starburst Galaxy.” Astrophysical Journal 630 (2): L137–L140.
Chicago author-date (all authors)
Dow-Hygelund, CC, BP Holden, RJ Bouwens, Arjen van der Wel, GD Illingworth, A Zirm, M Franx, P Rosati, H Ford, PG van Dokkum, SA Stanford, P Eisenhardt, and GG Fazio. 2005. “UV Continuum Spectroscopy of a 6L∗ Z=5.5 Starburst Galaxy.” Astrophysical Journal 630 (2): L137–L140.
Vancouver
1.
Dow-Hygelund C, Holden B, Bouwens R, van der Wel A, Illingworth G, Zirm A, et al. UV continuum spectroscopy of a 6L∗ z=5.5 starburst galaxy. ASTROPHYSICAL JOURNAL. 2005;630(2):L137–L140.
IEEE
[1]
C. Dow-Hygelund et al., “UV continuum spectroscopy of a 6L∗ z=5.5 starburst galaxy,” ASTROPHYSICAL JOURNAL, vol. 630, no. 2, pp. L137–L140, 2005.
@article{8579109,
  abstract     = {We have obtained a high S/ N ( 22.3 hr integration) UV continuum VLT FORS2 spectrum of an extremely bright (z(850) = 24.3) z = 5.515 +/- 0.003 star- forming galaxy ( BD38) in the field of the z = 1.24 cluster RDCS 1252.9 - 2927. From HST Advanced Camera for Surveys imaging, this object was selected as a potential z similar to 6 Lyman break galaxy ( LBG) based on its red i(775) -z(850) = 1.5 color. This object shows substantial continuum ( 0.41 +/- 0.02 mu Jy at 1300 angstrom) and low- ionization interstellar absorption features typical of LBGs at lower redshift A ( z similar to 3); this is the highest redshift LBG confirmed via metal- absorption spectral features. The equivalent widths of the absorption features are similar to z similar to 3 strong Ly alpha absorbers. No noticeable Ly alpha emission was detected (F <= 1.4 x 10(-18) ergs cm (-2) s (-1), 3 sigma). This object is at most amplified 0.3 mag from gravitational lensing by the foreground cluster. The delensed half- light radius of this object is 1.6 kpc ( 0 ".25), and the star formation rate derived from the rest- frame UV luminosity is SFRUV = 38h(0.7)(-2) M-circle dot yr (-1) corrected for dust extinction). In terms of recent determinations of the z similar to 6 UV luminosity function, this object appears to be 6L(*). The Spitzer IRAC fluxes for this object are 23.3 and 23.2 AB mag ( delensed) in the 3.6 and 4.5 mu m channels, respectively, implying a mass of ( 1 - 6) x 10(10) M-circle dot from population synthesis models. This galaxy is brighter than any confirmed z similar to 6 i- dropout to date in the band, and in the 3.6 and 4.5 mu m channels, and is the most z (850) massive starbursting galaxy known at z > 5.},
  author       = {Dow-Hygelund, CC and Holden, BP and Bouwens, RJ and van der Wel, Arjen and Illingworth, GD and Zirm, A and Franx, M and Rosati, P and Ford, H and van Dokkum, PG and Stanford, SA and Eisenhardt, P and Fazio, GG},
  issn         = {0004-637X},
  journal      = {ASTROPHYSICAL JOURNAL},
  keywords     = {LYMAN-BREAK GALAXIES,FRAME ULTRAVIOLET-SPECTRA,ULTRA-DEEP-FIELD,STAR-FORMATION,SPACE-TELESCOPE,ADVANCED CAMERA,Z-APPROXIMATE-TO-6,RDCS-1252.9-2927,Z-SIMILAR-TO-6,DENSITY,galaxies : high-redshift,galaxies : individual (J1252-5224-4599),galaxies : starburst},
  language     = {eng},
  number       = {2},
  pages        = {L137--L140},
  title        = {UV continuum spectroscopy of a 6L∗ z=5.5 starburst galaxy},
  url          = {http://dx.doi.org/10.1086/491700},
  volume       = {630},
  year         = {2005},
}

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