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Investigating the Accretion Nature of Binary Supermassive Black Hole Candidate SDSS J025214.67â'002813.7.
- Source :
-
Astrophysical Journal . 3/1/2022, Vol. 927 Issue 1, p1-8. 8p. - Publication Year :
- 2022
-
Abstract
- We present results of a multiwavelength analysis of SDSS J025214.67â'002813.7, a system that has been previously classified as a binary active galactic nucleus (AGN) candidate based on periodic signals detected in the optical light curves. We use available radioâ'X-ray observations of the system to investigate the true accretion nature. Analyzing new observations from XMM-Newton and NuSTAR, we characterize the X-ray emission and search for evidence of circumbinary accretion. Although the 0.5â€"10 keV spectrum shows evidence of an additional soft emission component, possibly due to extended emission from hot nuclear gas, we find the spectral shape is consistent with that of a single AGN. Compiling a full multiwavelength spectral energy distribution (SED), we also search for signs of circumbinary accretion, such as a “notch” in the continuum due to the presence of minidisks. We find that the radioâ€"optical emission agrees with the SED of a standard, radio-quiet, AGN; however, there is a large deficit in emission blueward of âĽ1400 Ă.... Although this deficit in emission can plausibly be attributed to a binary AGN system, we find that the SED of SDSS J0252â'0028 is better explained by emission from a reddened, single AGN. However, future studies of the expected hard X-ray emission associated with binary AGNs (especially in the unequal-mass regime) will allow for more rigorous analyses of the binary AGN hypothesis. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0004637X
- Volume :
- 927
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Astrophysical Journal
- Publication Type :
- Academic Journal
- Accession number :
- 155586021
- Full Text :
- https://doi.org/10.3847/1538-4357/ac4af1