SOFIA/HAWC+ Detection of a Gravitationally Lensed Starburst Galaxy at z = 1.03

Ma, Jingzhe; Brown, Arianna; Cooray, Asantha; Nayyeri, Hooshang; Messias, Hugo; Timmons, Nicholas; Staguhn, Johannes; Temi, Pasquale; Dowell, C. Darren; Wardlow, Julie; Fadda, Dario; Kovacs, Attila; Riechers, Dominik; Oteo, Ivan; Wilson, Derek; Perez-Fournon, Ismael

doi:10.3847/1538-4357/aad4a0

SOFIA/HAWC+ Detection of a Gravitationally Lensed Starburst Galaxy at z = 1.03

Ma, Jingzhe; Brown, Arianna; Cooray, Asantha; Nayyeri, Hooshang; Messias, Hugo; Timmons, Nicholas; Staguhn, Johannes; Temi, Pasquale; Dowell, C. Darren; Wardlow, Julie; Fadda, Dario; Kovacs, Attila; Riechers, Dominik; Oteo, Ivan; Wilson, Derek; Perez-Fournon, Ismael

Authors

Jingzhe Ma

Arianna Brown

Asantha Cooray

Hooshang Nayyeri

Hugo Messias

Nicholas Timmons

Johannes Staguhn

Pasquale Temi

C. Darren Dowell

Julie Wardlow

Dario Fadda

Attila Kovacs

Dominik Riechers

Ivan Oteo

Derek Wilson

Ismael Perez-Fournon

Abstract

We present the detection at 89 μm (observed frame) of the Herschel-selected gravitationally lensed starburst galaxy HATLAS J1429-0028 (also known as G15v2.19) in 15 minutes with the High-resolution Airborne Wideband Camera-plus (HAWC+) onboard the Stratospheric Observatory for Infrared Astronomy (SOFIA). The spectacular lensing system consists of an edge-on foreground disk galaxy at z = 0.22 and a nearly complete Einstein ring of an intrinsic ultra-luminous infrared (IR) galaxy at z = 1.03. Is this high IR luminosity powered by pure star formation (SF) or also an active galactic nucleus (AGN)? Previous nebular line diagnostics indicate that it is star formation dominated. We perform a 27-band multiwavelength spectral energy distribution (SED) modeling including the new SOFIA/HAWC+ data to constrain the fractional AGN contribution to the total IR luminosity. The AGN fraction in the IR turns out to be negligible. In addition, J1429-0028 serves as a testbed for comparing SED results from different models/templates and SED codes (magphys, sed3fit, and cigale). We stress that star formation history is the dominant source of uncertainty in the derived stellar mass (as high as a factor of ~10) even in the case of extensive photometric coverage. Furthermore, the detection of a source at z ~ 1 with SOFIA/HAWC+ demonstrates the potential of utilizing this facility for distant galaxy studies including the decomposition of SF/AGN components, which cannot be accomplished with other current facilities.

Citation

Ma, J., Brown, A., Cooray, A., Nayyeri, H., Messias, H., Timmons, N., …Perez-Fournon, I. (2018). SOFIA/HAWC+ Detection of a Gravitationally Lensed Starburst Galaxy at z = 1.03. Astrophysical Journal, 864(1), Article 60. https://doi.org/10.3847/1538-4357/aad4a0

Journal Article Type	Article
Acceptance Date	Jul 17, 2018
Online Publication Date	Aug 30, 2018
Publication Date	Aug 30, 2018
Deposit Date	Sep 21, 2018
Publicly Available Date	Sep 21, 2018
Journal	Astrophysical Journal
Print ISSN	0004-637X
Publisher	American Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	864
Issue	1
Article Number	60
DOI	https://doi.org/10.3847/1538-4357/aad4a0