Astron. J., 158, 34-34 (2019/July-0)
Ultra-bright CO and [CI] emission in a lensed z = 2.04 submillimeter galaxy with extreme molecular gas properties.
DANNERBAUER H., HARRINGTON K., DIAZ-SANCHEZ A., IGLESIAS-GROTH S., REBOLO R., GENOVA-SANTOS R.T. and KRIPS M.
Abstract (from CDS):
We report the very bright detection of cold molecular gas with the IRAM NOEMA interferometer of the strongly lensed source WISE J132934.18+224327.3 at z = 2.04, the so-called Cosmic Eyebrow. This source has a similar spectral energy distribution from optical-mid/IR to submillimeter/radio but significantly higher fluxes than the well-known lensed SMG SMMJ 2135, the Cosmic Eyelash at z = 2.3. The interferometric observations unambiguously identify the location of the molecular line emission in two components, component CO32-A with ICO(3–2)=52.2±0.9 Jy km s–1 and component CO32-B with ICO(3–2)=15.7±0.7 Jy km s–1. Thus, our NOEMA observations of the CO(3-2) transition confirm the SMG-nature of WISE J132934.18+224327.3, resulting in the brightest CO(3-2) detection ever of an SMG. In addition, we present follow-up observations of the brighter component with the Green Bank Telescope (CO(1-0) transition) and IRAM 30 m telescope (CO(4-3) and [C I](1-0) transitions). The star formation efficiency of ∼100 L☉/(K km s–1 pc2) is at the overlap region between merger-triggered and disk-like star formation activity and the lowest seen for lensed dusty star-forming galaxies. The determined gas depletion time ∼60 Myr, intrinsic infrared star formation SFRIR ≃ 2000 M☉ yr–1, and gas fraction Mmol/M* = 0.44 indicate a starburst/merger-triggered star formation. The obtained data of the cold ISM-from CO(1-0) and dust continuum-indicates a gas mass µMmol ∼ 15 x 1011 M☉ for component CO32-A. Its unseen brightness offers us the opportunity to establish the Cosmic Eyebrow as a new reference source at z = 2 for galaxy evolution.
© 2019. The American Astronomical Society. All rights reserved.
galaxies: ISM - galaxies: high-redshift - galaxies: starburst - gravitational lensing: strong - infrared: galaxies - submillimeter: galaxies
Status in Simbad:
HATLAS J132527+284452 (z=1.68) not identified (actually the source detected in Timmons et al. 2015 is H-ATLAS J142935.3-002836 at z=1.027).
View the reference in ADS
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