학술논문

A Coherent Study of Emission Lines from Broad-Band Photometry: Specific Star-Formation Rates and [OIII]/H{\beta} Ratio at 3 < z < 6

Document Type

Working Paper

Author

Faisst, A. L.; Capak, P.; Hsieh, B. C.; Laigle, C.; Salvato, M.; Tasca, L.; Cassata, P.; Davidzon, I.; Ilbert, O.; Fevre, O. Le; Masters, D.; McCracken, H. J.; Steinhardt, C.; Silverman, J. D.; De Barros, S.; Hasinger, G.; Scoville, N. Z.

Source

Subject

Astrophysics - Astrophysics of Galaxies
Astrophysics - Cosmology and Nongalactic Astrophysics

Language

Abstract

We measure the H{\alpha} and [OIII] emission line properties as well as specific star-formation rates (sSFR) of spectroscopically confirmed 33 cannot be fully explained in a picture of cold accretion driven growth. We find a progressively increasing [OIII]{\lambda}5007/H{\beta} ratio out to z~6, consistent with the ratios in local galaxies selected by increasing H{\alpha} EW (i.e., sSFR). This demonstrates the potential of using "local high-z analogs" to investigate the spectroscopic properties and relations of galaxies in the re-ionization epoch.
Comment: 18 pages, 11 figures, 3 tables

Online Access

Open Access (Arxiv) Find it@PNU

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