SIMBAD references

We report the discovery of a massive SCUBA core with evidence of inflow and outflow motions. This core is detected by SCUBA at both 450 and 850 µm. Barely resolved by the telescope beam at 450 µm, it has a size of 10", corresponding to 0.28 pc at a distance of 5.7 kpc. The dust temperature is estimated to be ≤29 K, the total mass is 820 M_☉, and the average density is 1.1x10⁶/cm3 in a region with a radius of 5". Follow-up spectral line observations, including HCN (3-2), HCO⁺ (3-2), H¹³CO⁺ (3-2), and C¹⁷O (2-1), reveal a typical blue profile indicating that this core is collapsing. The CO (3-2) line profile is as broad as 38 km/s, indicating outflow motions in this region. This core is approximately 1.5 pc away from the known H II region G25.4NW, but there are no obvious radio, IRAS, MSX, or Spitzer sources associated with it. We suggest that this core is at a very early stage of massive star or cluster formation.