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Table 1

ALMA-IMF targets, a representative sample of massive protoclusters in the Milky Way.

Protocluster RA (1) Dec (1) VLSR(1) d Ref. Evolutionary
cloud name (1) [ICRS] [kms−1] [kpc] papers (2) stage (3) [pc] [×103 M]
W51-E 19:23:44.18 + 14:30:29.5 +55 5.4 ± 0.3 (1) IR-bright 0.41 10.4
W43-MM1 18:47:47.00 −01:54:26.0 +97 5.5 ± 0.4 (2) IR-quiet 0.47 7.0
G333.60 16:22:09.36 −50:05:58.9 −47 4.2 ± 0.7 (3) IR-bright 0.58 5.4
W51-IRS2 19:23:39.81 + 14:31:03.5 +55 5.4 ± 0.3 (1) IR-bright 0.39 4.8
G338.93 16:40:34.42 −45:41:40.6 −62 3.9 ± 1.0 (3) IR-quiet 0.58 4.5
G010.62 18:10:28.84 −19:55:48.3 −2 4.95 ± 0.5 (4) IR-bright 0.42 4.2
W43-MM2 18:47:36.61 −02:00:51.1 +97 5.5 ± 0.4 (2) IR-quiet 0.57 4.2
G008.67 18:06:21.12 −21:37:16.7 +37.6 3.4 ± 0.3 (3) IR-quiet 0.33 1.9
G012.80 18:14:13.37 −17:55:45.2 +37 2.4 ± 0.2 (5) IR-bright 0.32 1.7
G327.29 15:53:08.13 −54:37:08.6 −45 2.5 ± 0.5 (3) IR-bright 0.16 1.4
W43-MM3 18:47:41.46 −02:00:27.6 +97 5.5 ± 0.4 (2) IR-bright 0.47 1.1
G351.77 17:26:42.62 −36:09:20.5 −3 2.0 ± 0.7 (6) IR-bright 0.16 1.0
G353.41 17:30:26.28 −34:41:49.7 −17 2.0 ± 0.7 (6) IR-bright 0.30 0.9
G337.92 16:41:10.62 −47:08:02.9 −40 2.7 ± 0.7 (6) IR-bright 0.20 0.8
G328.25 15:57:59.68 −53:58:00.2 −43 2.5 ± 0.5 (3) IR-quiet 0.21 0.5

Notes. (1)Protocluster name, central position of the mosaics, and velocity at rest used for the ALMA-IMF observations. The Galactic coordinates of the associated ATLASGAL clumps are given in Table A.1. The VLSR values are taken from the high-density gas studies by Wienen et al. (2015) and Ginsburg et al. (2015) for W51, Nguyen-Luong et al. (2013) for W43, and Immer et al. (2014) for G012.80. The phase center of W43-MM1 in the pilot study is 18:47:46.50, −01:54:29.5. (2)References for the distance to the Sun: (1) Sato et al. (2010); (2) Zhang et al. (2014); (3) Csengeri et al. (2017); (4) Sanna et al. (2014); (5) Immer et al. (2013); (6) this paper. (3)Evolutionary stage of the ATLASGAL clump, as classified by Csengeri et al. (2017): IR-bright or IR-quiet (see Sect. 2.2). (4)Size and mass of the ATLASGAL clump, as defined by Csengeri et al. (2017), located at the center of the ALMA-IMF clouds, whose area and mass are given in Table 4. Mass estimates assume Tdust = 20 and 30 K for the IR-quiet and IR-bright sources, respectively. Sizes correspond to the geometric mean of the beam-deconvolved major and minor FWHM axes of Gaussian fits made in Csengeri et al. (2014).

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