Connecting black holes and galaxies in faint radio populations at cosmic noon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We leverage new ultra-deep, high resolution, multi-frequency radio imaging at 6 and 3 GHz with the unique datasets available in the GOODS-S/HUDF region in order to assess the AGN fraction in a faint radio-selected sample. For AGN identification, we adopt a multi-wavelength approach, combining X-ray and (mid-)infrared (IR) selections with radio identification such as X-ray to radio excess, flat radio spectral slopes, and the radio-IR correlation. We identify AGN in 43% of our radio sample, yielding an AGN source density of ∼ 1 arcmin−2. This AGN fraction is likely underestimated, as 1) our shallower 3 GHz data is biased against flat radio spectrum sources and 2) all of our selections may be biased against the most heavily obscured AGN. The James Webb Space Telescope’s Mid-Infrared Instrument (MIRI) will address the latter issue and we briefly outline our Cycle 1 Guaranteed Time Observation (GTO) program to search for heavily obscured AGN.

Original languageEnglish (US)
Title of host publicationProceedings of the International Astronomical Union
EditorsElisabete da Cunha, Elisabete da Cunha, Jacqueline Hodge, Jose Afonso, Laura Pentericci, David Sobral
PublisherCambridge University Press
Pages132-137
Number of pages6
Edition352
ISBN (Electronic)9781108492133
DOIs
StatePublished - 2020
Event352nd Symposium of the International Astronomical Union on Uncovering Early Galaxy Evolution in the ALMA and JWST Era - Viana do Castelo, Portugal
Duration: Jun 3 2019Jun 7 2019

Publication series

NameProceedings of the International Astronomical Union
Number352
Volume15
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221

Conference

Conference352nd Symposium of the International Astronomical Union on Uncovering Early Galaxy Evolution in the ALMA and JWST Era
Country/TerritoryPortugal
CityViana do Castelo
Period6/3/196/7/19

Keywords

  • galaxies: active
  • Galaxy: evolution
  • radio continuum: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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