Open Access

Table 1.

Massive galaxies in the RO-1001 group.

ID A B C D
RA 10:01:23.174 10:01:22.964 10:01:22.369 10:01:23.438
Dec 02:20:05.57 02:20:05.87 02:20:02.63 02:20:01.10
zspec 2.9214 2.9156 2.9064 2.9 (1)
log M M 11.13 11.13 11.23 11.00
SFR (2) M yr−1 306 706 266 < 30
Sν (870 μm) mJy 4.0 ± 0.1 9.1 ± 0.1 3.39 ± 0.15 < 0.3
Sν (1.25 mm) mJy 1.2 ± 0.1 3.4 ± 0.1 1.3 ± 0.2 < 0.3
Sν (3.4 mm) μJy 40 ± 5 88 ± 6 39 ± 5 < 15
Sν (10 cm) μJy 38 ± 3 34 ± 3 69 ± 6
ICO[3 − 2] Jy × km s−1 0.10 ± 0.03 0.69 ± 0.05 0.63 ± 0.05 < 0.1 (3)
FWZICO[3 − 2] (4) km s−1 381 1114 1098
vCO[3 − 2] (5) km s−1 460 13 −690
r1/2 (6) 0.07 ± 0.01 0.10 ± 0.003 0.11 ± 0.007

Notes. (1) Photometric redshifts; (2) Derived from the measurement of individual galaxies assuming the same SED shape as for their coaddition (Fig. 5). (3) Assuming a line width of 500 km s−1. (4) Full width at zero intensity (FWZI) corresponding to the full extraction range of the emission line in velocity. (5) Systemic velocities of the galaxies are relative to the average, flux-weighted redshift of the Lyα emission (z = 2.9154). (6) Reported sizes are half-light radii from a circular Gaussian fit. Errors are much smaller than the beam size given the high-S/N detections. The average size of 0.1″ corresponds to 800 pc at z = 3.

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