The Dragonfly Galaxy - II. ALMA unveils a triple merger and gas exchange in a hyper-luminous radio galaxy at z = 2

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Volume 584 (December 2015)

A&A, 584 (2015) A99

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Table 1

Measured and derived physical properties.


Region	NW	SE	C


RA(1h 54m)	55.738s	55.763s	55.799s
Dec(–20° 40′)	26.61′′	26.96′′	27.67′′
S_{1.2 mm} (mJy)	0.8 ± 0.2	1.5 ± 0.2	<0.3
I_CO(6−5) (Jy/bm· km s^-1)	2.0 ± 0.2	1.4 ± 0.2	0.20 ± 0.05
M_dust (10⁹ M_⊙)	0.5 ± 0.1	0.9 ± 0.1	<0.24
M_H₂ (10⁹ M_⊙) main^†	14−21	9 ± 2	2.2 ± 0.5
wings^‡	1.0−7.0	2.7−5.6	–

Notes. Errors reflect a conservative 10% uncertainty in flux calibration plus variation between methods to derive S_{1.2 mm} and I_CO(6−5) (peak intensity, or integrated intensity from the total intensity map or the line profile).

^(†)

Based on r₆₋₅ = I_CO(6−5)/I_CO(1−0) = 13, X_CO = 0.8 M_⊙ (K km s^-1 pc²)^-1.

^(‡)

Based on 17 ≤ r₆₋₅ ≤ 36 and the two difference models for NW (see text for details); X_CO = 0.8 M_⊙ (K km s^-1pc²)^-1.

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