[seminar] Astro Journal Club on 4 February

[Oskari Miettinen]

Dear all,

The Astro Journal Club will be held on Wednesday at 10:15 in the seminar
room F-201 of the Physics Department. This time we will discuss about
obscuration and star formation in mid-infrared luminous quasars.

Presenter: Ivan Delvecchio
Paper title: A Connection between Obscuration and Star Formation in
Luminous Quasars
Authors: Chen, C.-T. J., Hickox, R. C., Alberts, T., et al.

Abstract:
We present a measurement of the star formation properties of a uniform
sample of mid-IR selected, optically unobscured and obscured quasars
(QSO1s and QSO2s) in the Boötes survey region. We use a spectral energy
distribution (SED) analysis for photometric data spanning optical to
far-IR wavelengths to separate the AGN and host galaxy components. We find
that when compared to a matched sample of QSO1s, the QSO2s have roughly
twice the higher far-IR detection fractions, far-IR fluxes and infrared
star formation luminosities (L_SF_IR). Correspondingly, we show that the
AGN obscured fraction rises from 0.3 to 0.7 between (4-40)×10^11 Lsun. We
also find evidence associating X-ray absorption with the presence of
far-IR emitting dust. Overall, these results are consistent with galaxy
evolution models in which quasar obscuration is associated with a
dust-enshrouded starburst galaxies.

Link to the paper: http://adsabs.harvard.edu/abs/2015arXiv150104959C

Hope to see you all on Wednesday!

Best regards,
Oskari Miettinen