Table · dataset · 2018
Signatures of an incipient hot corino in B1b-S
Listed in IVOA Registry (Virtual Observatory)
The Barnard 1b core shows signatures of being at the earliest stages of low- mass star formation, with two extremely young and deeply embedded proto- stellar objects.
Description
Hence, this core is an ideal target to study the structure and chemistry of the first objects formed in the collapse of prestellar cores. We present ALMA Band 6 spectral line observations at ~0.6" of angular resolution towards Barnard 1b.
We have extracted the spectra towards both protostars, and used a local thermodynamic equilibrium (LTE) model to reproduce the observed line profiles. B1b-S shows rich and complex spectra, with emission from high energy transitions of complex molecules, such as CH_3_OCOH and CH_3_CHO, including vibrational level transitions. We have tentatively detected for the first time in this source emission from NH_2_CN, NH_2_CHO, CH_3_CH_2_OH, CH_2_OHCHO, CH_3_CH_2_OCOH and both aGg' and gGg' conformers of (CH_2_OH)_2_.
Read the rest (2 more)
This is the first detection of ethyl formate (CH_3_CH_2_OCOH) towards a low-mass star forming region. On the other hand, the spectra of the FHSC candidate B1b-N are free of COMs emission. In order to fit the observed line profiles in B1b-S, we used a source model with two components: an inner hot and compact component (200K, 0.35") and an outer and colder one (60K, 0.6").
The resulting COM abundances in B1b-S range from 10^-13^ for NH_2_CN and NH_2_CHO, up to 10^-9^ for CH_3_OCOH. Our ALMA Band 6 observations reveal the presence of a compact and hot component in B1b-S, with moderate abundances of complex organics. These results indicate that a hot corino is being formed in this very young Class 0 source.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/620/A80 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2018A&A...620A..80M ui.adsabs.harvard.edu/abs/2018A%26A...620A..80M ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/a%2Ba/620/a80 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 73%
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/620/a80 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:group:5101 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (73%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |