Identification of pre-stellar cores in high-mass star forming clumps via H2D+ observations with ALMA

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Table 1

Beam sizes, spatial resolutions, achieved sensitivity (rms), and spectral resolutions of the continuum and line observation in AG351 and AG354.

Observation	Beam size ^(a)	Spatial res.	rms	Spectral res.
AG351
Continuum	1.′′03 × 0.′′82, PA = 84.7°	1340 AU × 1170 AU	0.8 mJy beam⁻¹	–
o-H₂D⁺(1_1,0−1_1,1)	1.′′00 × 0.′′80, PA = 85.9°	1300 AU × 1040 AU	300 mK	0.22 km s⁻¹

AG354
Continuum	1.′′04 × 0.′′82, PA = 84.7°	1980 AU × 1560 AU	0.8 mJy beam⁻¹	–
o-H₂D⁺(1_1,0−1_1,1)	1.′′01 × 0.′′79, PA = 85.7°	1920 AU × 1500 AU	300 mK	0.22 km s⁻¹

Notes. The rms values were computed on the primary-beam-corrected data. ^(a) The beam size is expressed as: major axis × minor axis, position angle (PA).

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