Table · dataset · 2025
NGC 3259 spectroscopic dataset
Listed in IVOA Registry (Virtual Observatory)
Low-mass active galactic nuclei (AGNs) can provide important constraints on the formation and evolution of supermassive black holes (SMBHs), which stands as a central challenge in modern cosmology.
Description
To date, only small samples of intermediate-mass black holes (IMBHs, M(BH)<10^5^M_{sun}_) and "lesser" SMBHs (LSMBHs, M(BH)<10^6^M_{sun}_) have been identified. Our present study of NGC 3259 at D=27 Mpc with the Binospec integral field unit (IFU) spectrograph complemented with Keck Echelle Spectrograph and Imager observations demonstrates the strong capability and necessity for spectroscopic follow-up studies.
NGC 3259 hosts a black hole (BH) with a mass of M(BH)=(2.0-4.9)*10^5^M_{sun}_ from multi-epoch spectroscopic data, which is accreting at 1% of the Eddington limit, as suggested by the analysis of archival XMM-Newton observations. It is the second-nearest broad-line low-mass AGN after the archetypal galaxy NGC 4395. The spectroscopic data reveal a variable broad Ha profile likely resulting from asymmetrically distributed broad-line region (BLR) clouds or BLR outflow events.
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X-ray observations and the absence of an optical power-law continuum suggest partial obscuration of the accretion disk and hot corona by a dust torus. We estimated that Sloan Digital Sky Survey (SDSS) observations would only have the capacity to detect similar objects up to D=35Mpc. A detailed photometric analysis of NGC 3259 using HST images provides a central spheroid stellar mass estimate that is 20 times lower than expected, based on the M(BH) - M(sph) relation, making this galaxy a significant outlier.
This discrepancy suggests divergent growth pathways for the central BH and spheroid, potentially influenced by the potential presence of a bar in the galaxy. Finally, we demonstrate that the DESI and 4MOST surveys will detect low-accretion-rate IMBHs and LSMBHs, while the sensitivity of future X-ray instruments (such as AXIS and Athena) will secure their classification.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/702/A42 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2025A&A...702A..42G ui.adsabs.harvard.edu/abs/2025A%26A...702A..42G ↗
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/702/a42 ↗
catalogue entry · from IVOA Registry
Topics
- From keywords
- Astronomy & Astrophysics
- Inferred from text
- Galactic astronomy 76% · Image 65%
Provenance · 1 source records, 11 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/a+a/702/a42 | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].anzsrc:field:510104 | enrichment · IVOA Registry | taxonomy-embedding@1.1.0 | title+keywords+description (76%) |
| 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 | |
| concepts[modality].local:modality:image | enrichment · IVOA Registry | keyword-concept-rules@1.0.0 | title+description (65%) |
| 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 |