Table · dataset · 2022
AAVSO and DASCH light curve of U Mon
Listed in IVOA Registry (Virtual Observatory)
We present an X-ray through submillimeter observations of the classical RV Tauri (RVb-type) variable U Mon, a post-asymptotic giant branch (AGB) binary with a circumbinary disk (CBD).
Description
Our SMA observations indicate a CBD diameter of <~550au. Our XMM-Newton observations make U Mon the first RV Tauri variable detected in X-rays.
The X-ray emission is characteristic of a hot plasma (~10MK), with L_X_=5x10^30^erg/s, and we consider its possible origin from U Mon, its companion, and/or binary system interactions. Combining DASCH and AAVSO data, we extend the time-series photometric baseline back to the late 1880s and find evidence that U Mon has secular changes that appear to recur on a timescale of ~60yr, possibly caused by a feature in the CBD.
Read the rest (2 more)
From literature radial velocities we find that the binary companion is a ~2M_{sun}_ A-type main-sequence star. The orientation of the binary's orbit lies along our line of sight ({omega}=95{deg}), such that apastron corresponds to photometric RVb minima, consistent with the post-AGB star becoming obscured by the near side of the CBD. In addition, we find the size of the inner-CBD hole (~4.5-9au) to be comparable to the binary separation, implying that one or both stars may interact with the CBD at apastron.
The obscuration of the post-AGB star implicates the companion as the likely source of the enhanced H{alpha} observed at RVb minima and of the X-ray emission that may arise from accreted material.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/909/138 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2021ApJ...909..138V ui.adsabs.harvard.edu/abs/2021ApJ...909..138V ↗
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/apj/909/138 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/apj/909/138 | 14 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:optical | 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 |