Table · dataset · 2025
EI Psc optical and infrared spectra
Listed in IVOA Registry (Virtual Observatory)
We present results of time-resolved optical spectroscopy and photometry of the short-orbital period dwarf nova EI Psc.
Description
This study aims to determine fundamental system parameters of EI Psc, study properties of accretion structures in the system, and investigate its origin and current evolution state. We analyse newly obtained time-resolved spectroscopic and photometric observations as well as archival data.
We used light curve modelling, Doppler tomography, and MESA evolutionary models to study the characteristics of EI Psc. The system contains a relatively low temperature (T_eff_=6130K) white dwarf with mass of M_WD_=0.70(4)M_{sun}_. The mass of the warm (T_2_=4440K) secondary is M_2_=0.13M_{sun}_.
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The inclination of the system is i=44.5{deg}(7). The mass accretion rate is ~4x10^-13M_{sun}_/yr^. The long-term light curve of the system shows outbursts and superoutbursts.
The quiescence light curve is double-humped and is formed by the combination of radiation from the Roche lobe filling the hot secondary and the hot spot. The radius of the outer disc is about two times smaller than the tidal truncation radius. Most of the disc's emission consists of emission lines and radiation from the hot spot at the stream-disc impact region.
These types of systems are formed from progenitors with a low mass WD M_WD_<~0.6M_{sun}_ and relatively massive secondaries 1.1-1.5M_{sun}_ with initial orbital periods on a scale of days. The number of similar systems is expected to be significantly lower than the usual CVs due to a lower forming rate of their relatively massive progenitors.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/699/A81 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2025A&A...699A..81K ui.adsabs.harvard.edu/abs/2025A%26A...699A..81K ↗
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/699/a81 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Stellar astronomy and planetary systems 77%
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/699/a81 | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:field:510109 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (77%) |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:infrared | source · 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 |