NOCTURNE. III. Unidentified variable emission in the nuclear regions of PKS 2153-69
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866915815311278080 |
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| author | Puga, Miguel Coloma Berton, Marco Condò, Pierpaolo García-Pérez, Abigail Järvelä, Emilia Lähteenmäki, Anne Panda, Swayamtrupta |
| author_facet | Puga, Miguel Coloma Berton, Marco Condò, Pierpaolo García-Pérez, Abigail Järvelä, Emilia Lähteenmäki, Anne Panda, Swayamtrupta |
| contents | Historically, the study of the central regions of Type 1 AGN has been limited by the combination of the host galaxy spectrum with strong emission from the accretion disk and NLR/BLR, which prevented us from accurately probing the galactic and AGN properties in the central regions. Integral field spectroscopy allows us to correct for this effect and study both the unobscured cores of AGN host galaxies as well as the uncontaminated spectra of their central engines with unprecedented precision. Using MUSE WFM observations, in this work, we present a combined method for modelling and subtracting QSO light in type-1 AGN alongside results for one such source, PKS 2153-68 (z=0.028), both jetted and gamma-ray emitting. After separating the host galaxy and AGN spectra, we discuss the discovery of an unresolved and yet-to-be-identified high-velocity ($\sim$25000 km/s) short timescale ($\leq$1 yr) variable emission, unlike anything observed in other variable AGN. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_21286 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | NOCTURNE. III. Unidentified variable emission in the nuclear regions of PKS 2153-69 Puga, Miguel Coloma Berton, Marco Condò, Pierpaolo García-Pérez, Abigail Järvelä, Emilia Lähteenmäki, Anne Panda, Swayamtrupta Astrophysics of Galaxies Historically, the study of the central regions of Type 1 AGN has been limited by the combination of the host galaxy spectrum with strong emission from the accretion disk and NLR/BLR, which prevented us from accurately probing the galactic and AGN properties in the central regions. Integral field spectroscopy allows us to correct for this effect and study both the unobscured cores of AGN host galaxies as well as the uncontaminated spectra of their central engines with unprecedented precision. Using MUSE WFM observations, in this work, we present a combined method for modelling and subtracting QSO light in type-1 AGN alongside results for one such source, PKS 2153-68 (z=0.028), both jetted and gamma-ray emitting. After separating the host galaxy and AGN spectra, we discuss the discovery of an unresolved and yet-to-be-identified high-velocity ($\sim$25000 km/s) short timescale ($\leq$1 yr) variable emission, unlike anything observed in other variable AGN. |
| title | NOCTURNE. III. Unidentified variable emission in the nuclear regions of PKS 2153-69 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2602.21286 |