Table 1
Properties of the sample targeted by this work.
| Core | Coordinates | Distancea | N(H2)b | Tdust b | Lc | HGBS catalogue objectd | |
|---|---|---|---|---|---|---|---|
| RA (J2000) | Dec (J2000) | 1022 cm−2 | K | pc | |||
| Taurus | |||||||
| Tau 410 | 04h18m32.99s | +28°28m29.0s | 130 | 1.8 | 11.4 | 0.096–0.149 | Same |
| Tau 420 | 04h18m40.32s | +28°23m16.0s | 130 | 4.0 | 12.8 | 0.064–0.120 | Same |
| TMC1-Ce | 04h41m 34.31s | +26°00m40.0s | 140 | 1.9 | 11.3 | 0.129–0.157 | – |
| L1544 | 05h04m 17.21s | +25°10m42.8s | 170 | 11.6 | 10.2 | 0.073–0.125 | – |
| Isolated cores | |||||||
| L183 | 15h54m08.56s | −02°52m49.0s | 110 | 5.9 | 9.6 | 0.052–0.077 | – |
| L429 | 18h17m05.53s | −08°13m29.9s | 200 | 5.1 | 9.9 | 0.065–0.109 | – |
| L694-2 | 19h41m05.03s | +10°57m02.0s | 250 | 4.3 | 9.8 | 0.077–0.111 | – |
| Ophiuchus | |||||||
| Oph 1 | 16h31m57.63s | −24°57m35.7s | 140 | 3.8 | 13.4 | 0.067–0.141 | Oph 410+412f |
| Oph 2 | 16h31m39.94s | −24°49m50.3s | 140 | 5.2 | 13.3 | 0.075–0.115 | Oph 387 (24″) |
| Oph 3 | 16h27m33.24s | −24°26m24.1s | 140 | 7.8 | 12.5 | 0.085–0.110 | Oph 246 (7.8″) |
| Oph 4 | 16h27m12.77s | −24°29m40.3s | 140 | 5.6 | 13.9 | 0.084–0.142 | Oph 196 (9.2″) |
| Oph 5 | 16h27m15.28s | −24°30m30.1s | 140 | 5.4 | 13.9 | 0.081–0.125 | Oph 201 (11″) |
| Oph 6 | 16h27m19.99s | −24°27m17.6s | 140 | 4.7 | 13.8 | 0.117–0.155 | Oph 215 (5.7″) |
| Oph D | 16h28m28.56s | −24°19m25.0s | 140 | 1.7 | 13.3 | 0.076–0.108 | Oph 316 (11″) |
| Corona Australis | |||||||
| CrA 038 | 19h01m46.10s | −36°55m35.7s | 150 | 6.2 | 13.7 | 0.078–0.109 | Same |
| CrA 040 | 19h01m47.28s | −36°56m39.8s | 150 | 4.6 | 15.5 | 0.115–0.144 | Same |
| CrA 044 | 19h01m54.45s | −36°57m48.9s | 150 | 10.5 | 18.2 | 0.044–0.074 | Same |
| CrA 047 | 19h01m55.86s | −36°57m46.9s | 150 | 9.9 | 19.0 | 0.044–0.071 | Same |
| CrA 050ɡ | 19h01m58.94s | −36°57m09.9s | 150 | 3.5 | 18.0 | 0.107–0.132 | Same |
| CrA 151 | 19h10m20.17s | −37°08m27.0s | 150 | 4.1 | 11.2 | 0.041–0.076 | Same |
Notes. (a)Distance references: Ophiuchus, Ortiz-León et al. (2018); Taurus, Galli et al. (2019); Corona Australis, Galli et al. (2020); L183, L429, L694-2, Redaelli et al. (2018, and references therein). (b)The gas column density and dust temperature are taken from the maps generated from the Herschel continuum data. Values towards the cores’ coordinates, averaged in a 37″ beam. (c)Path length along the line of sight from where the molecular emission arises in Eq. (1). The two values correspond to the equivalent diameter of the region encompassing the 60% and 40% contours of the N(H2) peak value, as described in Sect. 4.5. (d)Corresponding object in the HGBS catalogues (when present) and the distance offset to our pointing. (e)The TMC1-C pointing is offset by ≈60″ compared to the one of Caselli et al. (2008).(f) Oph 1 is found roughly halfway between the centres of Oph 410 (22″ to the north-west) and Oph 412 (18″ to the south-west) from the HGBS catalogue. For the DCO+ (4−3) spectrum towards this object, we took the average of the two spectra. Their intensities differ by ~5%. (ɡ)CrA 050 contains a detected YSO within its boundaries (source SMM2, Sicilia-Aguilar et al. 2013). This is a young, Class I object.
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