Evidence for Merger-driven Growth in Luminous, High-z, Obscured AGNs in the CANDELS/COSMOS Field

Donley, J.L.; Kartaltepe, J.; Kocevski, D.; Salvato, M.; Santini, P.; Suh, H.; Civano, F.; Koekemoer, A.M.; Trump, J.; Brusa, M.; Cardamone, C.; Castro, A.; Cisternas, M.; Conselice, C.; Croton, D.; Hathi, N.; Liu, C.; Lucas, R.A.; Nair, P.; Rosario, D.; Sanders, D.; Simmons, B.; Villforth, C.; Alexander, D.M.; Bell, E.F.; Faber, S.M.; Grogin, N.A.; Lotz, J.; McIntosh, D.H.; Nagao, T.

doi:10.3847/1538-4357/aa9ffa

Evidence for Merger-driven Growth in Luminous, High-z, Obscured AGNs in the CANDELS/COSMOS Field

Donley, J.L.; Kartaltepe, J.; Kocevski, D.; Salvato, M.; Santini, P.; Suh, H.; Civano, F.; Koekemoer, A.M.; Trump, J.; Brusa, M.; Cardamone, C.; Castro, A.; Cisternas, M.; Conselice, C.; Croton, D.; Hathi, N.; Liu, C.; Lucas, R.A.; Nair, P.; Rosario, D.; Sanders, D.; Simmons, B.; Villforth, C.; Alexander, D.M.; Bell, E.F.; Faber, S.M.; Grogin, N.A.; Lotz, J.; McIntosh, D.H.; Nagao, T.

Authors

J.L. Donley

J. Kartaltepe

D. Kocevski

M. Salvato

P. Santini

H. Suh

F. Civano

A.M. Koekemoer

J. Trump

M. Brusa

C. Cardamone

A. Castro

M. Cisternas

C. Conselice

D. Croton

N. Hathi

C. Liu

R.A. Lucas

P. Nair

D. Rosario

D. Sanders

B. Simmons

C. Villforth

Professor David Alexander d.m.alexander@durham.ac.uk
Professor

E.F. Bell

S.M. Faber

N.A. Grogin

J. Lotz

D.H. McIntosh

T. Nagao

Abstract

We report the detection of GeV γ-ray emission from supernova remnant HESS J1731-347 using 9 yr of Fermi Large Area Telescope data. We find a slightly extended GeV source in the direction of HESS J1731-347. The spectrum above 1 GeV can be fitted by a power law with an index of Γ = 1.77 ± 0.14, and the GeV spectrum connects smoothly with the TeV spectrum of HESS J1731-347. Either a hadronic–leptonic or a pure leptonic model can fit the multiwavelength spectral energy distribution of the source. However, the hard GeV γ-ray spectrum is more naturally produced in a leptonic (inverse Compton scattering) scenario, under the framework of diffusive shock acceleration. We also searched for the GeV γ-ray emission from the nearby TeV source HESS J1729-345. No significant GeV γ-ray emission is found, and upper limits are derived.

Citation

Donley, J., Kartaltepe, J., Kocevski, D., Salvato, M., Santini, P., Suh, H., …Nagao, T. (2018). Evidence for Merger-driven Growth in Luminous, High-z, Obscured AGNs in the CANDELS/COSMOS Field. Astrophysical Journal, 853(1), https://doi.org/10.3847/1538-4357/aa9ffa

Journal Article Type	Article
Acceptance Date	Dec 4, 2017
Online Publication Date	Jan 23, 2018
Publication Date	Jan 23, 2018
Deposit Date	Feb 8, 2018
Publicly Available Date	Feb 8, 2018
Journal	Astrophysical Journal
Print ISSN	0004-637X
Publisher	American Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	853
Issue	1
DOI	https://doi.org/10.3847/1538-4357/aa9ffa