Table · dataset · 2023
Water maser super-flare G25.65+1.04
Listed in IVOA Registry (Virtual Observatory)
G25.65+1.04 is one of a few known "super-flare" water masers in the Milky Way, but in contrast to the other sources of the sample, it remains the least studied; in fact, even the nature of the source driving the water maser is still unclear.
Description
With this project, we aim to clarify the composition and properties of the G25.65+1.04 region by means of examining the parameters of the continuum sources and establishing their association with masers of different types.
Our previous VLA observation detected four continuum peaks (VLA 1-4), three of which (VLA 1-3) were closely spaced and presented a linear orientation. However, that VLA B-configuration observation lacked the spatial resolution to resolve the individual sources. A higher resolution (A-configuration) VLA observation of continuum and spectral lines was conducted in 2019 using L, S, C, and Ku-bands.
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For the first time, the continuum source VLA 1 - associated with the flaring water maser - is resolved into two components - VLA 1A and 1B. VLA 1A and the water maser are found to spatially coincide and are thought to be powered by the same source - a protostar at an early stage of evolution, showing active ejection. We argue that VLA 2 pinpoints an activly ejecting high-mass protostar as it is associated with a 6.7GHz methanol maser and a magnetised jet traced by 22GHz H_2_O maser.
Highly polarised OH maser emission is detected in the vicinity of VLA 1-2, with the brightest OH maser found in VLA 2. The magnetic field, identified from the OH maser emission, ranges from ~+0.4mG in VLA 1A to ~-8mG in VLA 2. The G25.65+1.04 region is found to consist of at least two young stellar objects: VLA 1A and VLA 2.
Both sources are found to be at an active accretion/ejection stage of evolution.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/673/A60 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2023A&A...673A..60B ui.adsabs.harvard.edu/abs/2023A%26A...673A..60B ↗
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/673/a60 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Radio
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/673/a60 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:radio | source · 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 |