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Cited by 288

The DOI matches its Crossref record; 36 of the 36 references it cites were found in a registry or an index.

THE SPECTRAL ENERGY DISTRIBUTIONS OF z ∼ 8 GALAXIES FROM THE IRAC ULTRA DEEP FIELDS: EMISSION LINES, STELLAR MASSES, AND SPECIFIC STAR FORMATION RATES AT 650 MYR

Open access
Labbé, I., Oesch, P. A., Bouwens, R. J., Illingworth, G. D., Magee, D., González, V., Carollo, C. M., Franx, M., Trenti, M., van Dokkum, P. G., Stiavelli, M.·2013·The Astrophysical Journal
DOI 10.1088/2041-8205/777/2/l19
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Abstract

Using new ultradeep Spitzer /InfraRed Array Camera (IRAC) photometry from the IRAC Ultra Deep Field program, we investigate the stellar populations of a sample of 63 Y -dropout galaxy candidates at z ∼ 8, only 650 Myr after the big bang. The sources are selected from HST /ACS+WFC3/IR data over the Hubble Ultra Deep Field (HUDF), two HUDF parallel fields, and wide area data over the CANDELS/GOODS-South. The new Spitzer /IRAC data increase the coverage in [3.6] and [4.5] to ∼120h over the HUDF reaching depths of ∼28 (AB,1σ). The improved depth and inclusion of brighter candidates result in direct ⩾3σ InfraRed Array Camera (IRAC) detections of 20/63 sources, of which 11/63 are detected at ⩾5σ. The average [3.6]–[4.5] colors of IRAC detected galaxies at z ∼ 8 are markedly redder than those at z ∼ 7, observed only 130 Myr later. The simplest explanation is that we witness strong rest-frame optical emission lines (in particular [O iii ] λλ4959, 5007 + Hβ) moving through the IRAC bandpasses with redshift. Assuming that the average rest-frame spectrum is the same at both z ∼ 7 and z ∼ 8 we estimate a rest-frame equivalent width of Å contributing mag to the [4.5] filter at z ∼ 8. The corresponding Å implies an average specific star formation rate of Gyr −1 and a stellar population age of Myr. Correcting the spectral energy distribution for the contribution of emission lines lowers the average best-fit stellar masses and mass-to-light ratios by ∼3 × , decreasing the integrated stellar mass density to Mpc −3 .

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Metadata

Authors
Labbé, I., Oesch, P. A., Bouwens, R. J., Illingworth, G. D., Magee, D., González, V., Carollo, C. M., Franx, M., Trenti, M., van Dokkum, P. G., & Stiavelli, M.
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
2013-10-22
Volume
777
Issue
2
Pages
L19
ISSN
  • 2041-8205 (ISSN-L)
  • 2041-8213
DOI
10.1088/2041-8205/777/2/l19
OpenAlex
W2037878575
Cited by
288
References
36
FWCI
14.40
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: THE SPECTRAL ENERGY DISTRIBUTIONS OF z ∼ 8 GALAXIES FROM THE IRAC ULTRA DEEP FIELDS: EMISSION LINES, STELLAR MASSES, AND SPECIFIC STAR FORMATION RATES AT 650 MYR. https://app.cochat.ai/papers/10.1088/2041-8205/777/2/l19
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Labbé, I., Oesch, P. A., Bouwens, R. J., Illingworth, G. D., Magee, D., González, V., Carollo, C. M., Franx, M., Trenti, M., van Dokkum, P. G., & Stiavelli, M. (2013). THE SPECTRAL ENERGY DISTRIBUTIONS OF z ∼ 8 GALAXIES FROM THE IRAC ULTRA DEEP FIELDS: EMISSION LINES, STELLAR MASSES, AND SPECIFIC STAR FORMATION RATES AT 650 MYR. The Astrophysical Journal. https://doi.org/10.1088/2041-8205/777/2/l19

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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