Table · dataset · 2026
rho Leo photometric and spectroscopic variability
Listed in IVOA Registry (Virtual Observatory)
The post-main-sequence evolution of massive stars remains poorly understood, particularly in the case of blue supergiants.
Description
As key drivers of the dynamical and chemical evolution of galaxies, massive stars warrant detailed investigation during this complex evolutionary stage. Hot supergiants exhibit pronounced photometric and spectroscopic variability, typically in the form of quasi-periodic rather than strictly periodic variations.
We investigate the variability patterns of the evolved B-type star rho Leo to determine its properties, identify the underlying physical processes, and constrain its evolutionary stage. We have combined extensive, long-term datasets of spectroscopic and photometric observations from various sources. These include data from the TESS and Kepler space telescopes, as well as observations from the 1.5m telescope in Estonia.
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We analysed the data using the Generalized Lomb-Scargle periodogram, Lomb-Scargle periodogram with pre-whitening, and the Weighted Wavelet Z-Transform. To determine the fundamental parameters of rho Leo, we fitted synthetic line profiles computed with FastWind code to the HARPS spectrum. We used the zpektr code to infer the stellar rotation inclination angle.
The HeI 6678.151{AA} line profile exhibits significant changes in radial velocity and, consequently, in its moment values. We identify a set of periods and harmonics ranging from ~0.8 to ~35 days. Some periods remain nearly constant, while others appear and disappear from one observing season to another.
A comparison of spectroscopic and photometric data, along with the shape of the phase curves, helps to constrain the nature of several periods. In particular, the ~11-day period is attributed to stellar rotation, while the ~17-day period is associated with radial pulsations.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A200 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2026A&A...706A.200C ui.adsabs.harvard.edu/abs/2026A%26A...706A.200C ↗
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/706/a200 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Optical
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Astronomical sciences 72%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/706/a200 | 14 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 (72%) |
| 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 |