SIMBAD references

2019ApJ...879...95R - Astrophys. J., 879, 95-95 (2019/July-2)

The Atacama Cosmology Telescope: CO(J = 3 - 2) mapping and lens modeling of an ACT-selected dusty star-forming galaxy.

RIVERA J., BAKER A.J., GALLARDO P.A., GRALLA M.B., HARRIS A.I., HUFFENBERGER K.M., HUGHES J.P., KEETON C.R., LOPEZ-CARABALLO C.H., MARRIAGE T.A., PARTRIDGE B., SIEVERS J.L., TAGORE A.S., WALTER F., WEISS A. and WOLLACK E.J.

Abstract (from CDS):

We report Northern Extended Millimeter Array CO(J = 3 - 2) observations of the dusty star-forming galaxy ACT-S J020941+001557 at z = 2.5528, which was detected as an unresolved source in the Atacama Cosmology Telescope (ACT) equatorial survey. Our spatially resolved spectral line data support the derivation of a gravitational lens model from 37 independent velocity channel maps using a pixel-based algorithm, from which we infer a velocity-dependent magnification factor µ ≃ 7-22 with a luminosity-weighted mean <µ>~13. The resulting source-plane reconstruction is consistent with a rotating disk, although other scenarios cannot be ruled out by our data. After correction for lensing, we derive a line luminosity LCO(3–2)^′^=(5.53±0.69)×1010Kkms–1pc2, a cold gas mass Mgas=(3.86±0.33)×1010M, a dynamical mass Mdynsin2i=3.9–1.5+1.8×1010M, and a gas mass fraction fgascsc2i=1.0–0.4+0.8. The line brightness temperature ratio of r3,1 ≃ 1.6 relative to a Green Bank Telescope CO(J = 1 - 0) detection may be elevated by a combination of external heating of molecular clouds, differential lensing, and/or pointing errors.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: high-redshift - galaxies: ISM - galaxies: starburst - gravitational lensing: strong

Simbad objects: 5

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2019.10.17-16:17:33

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