SIMBAD references

2007A&A...470..633G - Astronomy and Astrophysics, volume 470, 633-638 (2007/8-1)

The origin of the molecular emission around the southern hemisphere Re 4 IRS - HH 188 region.


Abstract (from CDS):

We present SEST observations of the molecular environment ahead of the southern Herbig-Haro object 188 (HH 188), associated with the low-mass protostar Re 4 IRS. We have also used the SuperCosmos Hα survey to search for Hα emission associated with the Re 4 IRS - HH 188 region. The aim of the present work is to study the properties of the molecular gas and to better characterize this southern star forming region. We mapped the HCO+ 3-2 and H13CO+ 1-0 emission around the YSO and took spectra of the CH3OH 20-10 A+ and 2–1-1–1 E and SO 65-54 towards the central source. Column densities are derived and different scenarios are considered to explain the origin of the molecular emission. HCO+ arises from a relatively compact region around the YSO; however, its peak emission is displaced to the south following the outflow direction. Our chemical analysis indicates that a plausible scenario is that most of the emission arises from the cold, illuminated dense gas ahead of the HH 188 object. We have also found that HH 188, a high excitation object, seems to be part of a parsec scale and highly collimated HH system. Re 4 IRS is probably a binary protostellar system, in the late Class 0 or Class I phase. One of the protostars, invisible in the near-IR, seems to power the HH 188 system.

Abstract Copyright:

Journal keyword(s): ISM: individual objects: HH 188 - ISM: abundances - ISM: clouds - ISM: molecules - radio lines: ISM - stars: formation

Nomenclature: Table 3: [GV2007] N (Nos 1-5).

Simbad objects: 13

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