SIMBAD references

2008ApJ...686L..17C - Astrophys. J., 686, L17-L20 (2008/October-2)

The hidden H i-massive luminous infrared galaxy HIZOA J0836-43: inside-out galaxy formation.

CLUVER M.E., JARRETT T.H., APPLETON P.N., KRAAN-KORTEWEG R.C., WOUDT P.A., KORIBALSKI B.S., DONLEY J.L., WAKAMATSU K. and NAGAYAMA T.

Abstract (from CDS):

HIZOA J0836-43 is an extreme gas-rich (M_HI_= 7.5x1010 M) disk galaxy which lies hidden behind the strongly obscuring Vela region of the Milky Way. Utilizing observations from the Spitzer Space Telescope, we have found it to be a luminous infrared starburst galaxy with a star formation rate of ∼21 M/yr, arising from exceptionally strong molecular PAH emission (L7.7µm=1.50x109 L) and far-infrared emission from cold dust. The galaxy exhibits a weak mid-infrared continuum compared to other star-forming galaxies and U/LIRGs. This relative lack of emission from small grains suggests atypical interstellar medium conditions compared to other starbursts. We do not detect significant [Ne V] or [O IV], which implies an absent or very weak AGN. The galaxy possesses a prominent bulge of evolved stars and a stellar mass of 4.4(±1.4)x1010 M. With its plentiful gas supply and current star formation rate, a doubling of stellar mass would occur on a timescale of ∼2 Gyr. Compared to local galaxies, HIZOA J0836-43 appears to be a ``scaled up'' spiral undergoing inside-out formation, possibly resembling stellar disk building processes at intermediate redshifts.

Abstract Copyright:

Journal keyword(s): galaxies: individual (HIZOA J0836-43) - Galaxies: Starburst - Infrared: Galaxies

Simbad objects: 6

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2020.10.24-11:37:47

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