Table · dataset · 2025
4FGL J1544.2-2554 light curves
Listed in IVOA Registry (Virtual Observatory)
Spider pulsars are millisecond pulsars in tight binary systems in which a low-mass companion star is heated and ablated by the pulsar wind.
Description
Observations of these objects allow one to study stellar evolution with the formation of millisecond pulsars and the physics of superdense matter in neutron stars. However, spiders are rare due to difficulties related to their discovery when using typical radio search techniques.
The Fermi gamma-ray source 4FGL J1544.2-2554 was recently proposed as a pulsar candidate, and its likely X-ray and optical counterparts, with the galactic coordinates l=~344.76deg, b=~22.59deg and the magnitude G=~20.6, were found using the eROSITA and Gaia surveys. Our goals are to study whether the source is a new spider pulsar and to estimate its fundamental parameters. We performed the first optical time series multi-band photometry of the object.
Read the rest (2 more)
We used the Lomb-Scargle periodogram to search for its brightness periodicity and fitted its light curves with a model of direct heating of the binary companion by the pulsar wind. The source shows a strong brightness variability with a period of =~2.724h and an amplitude of >2.5mag, and its light curves have a single broad peak per period. These features are typical for spider pulsars.
The curves are well fitted by the direct heating model, resulting in an orbit inclination of the presumed spider system of =~83deg, a companion mass of =~0.1M_{sun}_, 'day-side' and 'night-side' temperatures of =~7200K and =~3000K, a Roche lobe filling factor of =~0.65, and a distance of =~2.1kpc. Our findings suggest that 4FGL J1544.2-2554 is a spider pulsar. This result encourages the search for pulsar millisecond pulsations in radio and gamma-rays to confirm its nature.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/693/A158 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2025A&A...693A.158K ui.adsabs.harvard.edu/abs/2025A%26A...693A.158K ↗
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/693/a158 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/693/a158 | 13 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:gamma-ray | source · 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 |