Compact Radio Sources and Jet-driven AGN Feedback in the Early Universe: Constraints from Integral-Field Spectroscopy
Abstract
To investigate the impact of radio jets during the formation epoch of their massive host galaxies, we present an analysis of two massive, log M{sub stellar}/M{sub {circle_dot}} {approx} 10.6 and 11.3, compact radio galaxies at z = 3.5, TNJ0205+2242 and TNJ0121+1320. Their small radio sizes (R {le} 10 kpc) are most likely a sign of youth. In particular, we compare their radio properties and gas dynamics with those in well extended radio galaxies at high redshift, which show strong evidence for powerful, jet-driven outflows of significant gas masses (M {approx} 10{sup 9-10} M{sub {circle_dot}}). Our analysis combines rest-frame optical integral-field spectroscopy obtained with SINFONI on the VLT with existing radio imaging, CO(4-3) emission line spectra, and rest-frame UV longslit spectroscopy. [OIII]{lambda}5007 line emission is compact in both galaxies and lies within the region defined by the radio lobes. For TNJ0205+2242, the Ly{alpha} profile narrows significantly outside the jet radius, indicating the presence of a quiescent halo. TNJ0121+1320 has two components at a projected relative distance of {approx}10 kpc and a velocity offset of {approx}300 km s{sup -1}, measured from the [OIII]{lambda}5007 velocity map. This suggests that the fainter component is orbiting around the more massive, radio-loud galaxy. If motions aremore »
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 965459
- Report Number(s):
- UCRL-JRNL-233051
Journal ID: ISSN 0004-6361; AAEJAF; TRN: US200919%%584
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Journal Article
- Journal Name:
- Astronomy and Astrophysics
- Additional Journal Information:
- Journal Volume: 475; Journal Issue: 1; Journal ID: ISSN 0004-6361
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 99 GENERAL AND MISCELLANEOUS; FEEDBACK; GALAXIES; LUMINOSITY; RADIO GALAXIES; SPECTRA; SPECTROSCOPY; UNIVERSE; VELOCITY
Citation Formats
Nesvadba, N H, Lehnert, M D, De Breuck, C, Gilbert, A, and van Breugel, W. Compact Radio Sources and Jet-driven AGN Feedback in the Early Universe: Constraints from Integral-Field Spectroscopy. United States: N. p., 2007.
Web. doi:10.1051/0004-6361:20078175.
Nesvadba, N H, Lehnert, M D, De Breuck, C, Gilbert, A, & van Breugel, W. Compact Radio Sources and Jet-driven AGN Feedback in the Early Universe: Constraints from Integral-Field Spectroscopy. United States. https://doi.org/10.1051/0004-6361:20078175
Nesvadba, N H, Lehnert, M D, De Breuck, C, Gilbert, A, and van Breugel, W. 2007.
"Compact Radio Sources and Jet-driven AGN Feedback in the Early Universe: Constraints from Integral-Field Spectroscopy". United States. https://doi.org/10.1051/0004-6361:20078175. https://www.osti.gov/servlets/purl/965459.
@article{osti_965459,
title = {Compact Radio Sources and Jet-driven AGN Feedback in the Early Universe: Constraints from Integral-Field Spectroscopy},
author = {Nesvadba, N H and Lehnert, M D and De Breuck, C and Gilbert, A and van Breugel, W},
abstractNote = {To investigate the impact of radio jets during the formation epoch of their massive host galaxies, we present an analysis of two massive, log M{sub stellar}/M{sub {circle_dot}} {approx} 10.6 and 11.3, compact radio galaxies at z = 3.5, TNJ0205+2242 and TNJ0121+1320. Their small radio sizes (R {le} 10 kpc) are most likely a sign of youth. In particular, we compare their radio properties and gas dynamics with those in well extended radio galaxies at high redshift, which show strong evidence for powerful, jet-driven outflows of significant gas masses (M {approx} 10{sup 9-10} M{sub {circle_dot}}). Our analysis combines rest-frame optical integral-field spectroscopy obtained with SINFONI on the VLT with existing radio imaging, CO(4-3) emission line spectra, and rest-frame UV longslit spectroscopy. [OIII]{lambda}5007 line emission is compact in both galaxies and lies within the region defined by the radio lobes. For TNJ0205+2242, the Ly{alpha} profile narrows significantly outside the jet radius, indicating the presence of a quiescent halo. TNJ0121+1320 has two components at a projected relative distance of {approx}10 kpc and a velocity offset of {approx}300 km s{sup -1}, measured from the [OIII]{lambda}5007 velocity map. This suggests that the fainter component is orbiting around the more massive, radio-loud galaxy. If motions are gravitational, this implies a dynamical mass of 2 x 10{sup 11} M{sub {circle_dot}} for the radio-loud component. The dynamical mass, molecular gas mass measured from the CO line emission, and radio luminosity of these two compact radio galaxies imply that compact radio sources may well develop large-scale, energetic outflows as observed in extended radio galaxies, with the potential of removing significant fractions of the ISM from the host galaxy. The absence of luminous emission line gas extending beyond the radio emission in these sources agrees with the observed timescales and outflow rates in extended radio galaxies, and adds further evidence that the energetic, large-scale outflows observed in extended radio sources (Nesvadba et al. 2006) are indeed the result of influence of the radio jet.},
doi = {10.1051/0004-6361:20078175},
url = {https://www.osti.gov/biblio/965459},
journal = {Astronomy and Astrophysics},
issn = {0004-6361},
number = 1,
volume = 475,
place = {United States},
year = {Thu Jul 05 00:00:00 EDT 2007},
month = {Thu Jul 05 00:00:00 EDT 2007}
}
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