Bibcode
Schaerer, Daniel; Boone, Frederic; Laporte, N.
Bibliographical reference
The Spectral Energy Distribution of Galaxies, Proceedings of the International Astronomical Union, IAU Symposium, Volume 284, p. 315-316
Advertised on:
8
2012
Citations
0
Refereed citations
0
Description
We have used deep optical, near-IR, and IR observations from VLT,
Spitzer, Herschel, and LABOCA in strong lensing clusters to study
distant galaxies. In searches for optical-dropout galaxies (i.e. for z
>~ 7 candidates) we have found several galaxies with very unusual
SEDs characterised by a strong spectral break, presumably indicative of
high-z, although the objects are detected even in the Herschel bands
between 160 and 500 μm and at 870 μm. The latter indicates, from
simple estimates of the bolometric luminosity and from the IR SED, that
these ob jects are most likely at z ~ 2-2.5.
The resulting SEDs imply very high IR/UV ratios, indicative of very
large attenuation. Despite this, the large spectral break observed
between the optical and near-IR data is difficult to understand with
currently know spectral templates from galaxies, EROs, SMGs, and others,
both empirical and theoretical ones.