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OISTER optical and near-infrared monitoring observations of peculiar radio-loud active galactic nucleus SDSS J110006.07+442144.3

Morokuma, T, Tanaka, M, Tanaka, YT, Itoh, R, Tominaga, N, Gandhi, P, Pian, E, Mazzali, PA, Ohta, K, Matsumoto, E, Shibata, T, Akimoto, H, Akitaya, H, Ali, GB, Aoki, T, Doi, M, Ebisuda, N, Essam, A, Fujisawa, K, Fukushima, H , Goda, S, Gouda, Y, Hanayama, H, Hashiba, Y, Hashimoto, O, Hayashida, K, Hiratsuka, Y, Honda, S, Imai, M, Inoue, K, Ishibashi, M, Iwata, I, Izumiura, H, Kanda, Y, Kawabata, M, Kawaguchi, K, Kawai, N, Kokubo, M, Kuroda, D, Maehara, H, Mito, H, Mitsuda, K, Miyagawa, R, Miyaji, T, Miyamoto, Y, Morihana, K, Moritani, Y, Morokuma-Matsui, K, Murakami, K, Murata, KL, Nagayama, T, Nakamura, K, Nakaoka, T, Niinuma, K, Nishimori, T, Nogami, D, Oasa, Y, Oda, T, Ohshima, T, Saito, Y, Sakata, S, Sako, S, Sarugaku, Y, Sawada-Satoh, S, Seino, G, Sorai, K, Soyano, T, Taddia, F, Takahashi, J, Takagi, Y, Takaki, K, Takata, K, Tarusawa, K, Uemura, M, Ui, T, Urago, R, Ushioda, K, Watanabe, JI, Watanabe, M, Yamashita, S, Yanagisawa, K, Yonekura, Y and Yoshida, M (2017) OISTER optical and near-infrared monitoring observations of peculiar radio-loud active galactic nucleus SDSS J110006.07+442144.3. Publications of the Astronomical Society of Japan, 69 (5). ISSN 0004-6264

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OISTER optical and near-infrared monitoring observations of peculiar radio-loud active galactic nucleus SDSS J110006.07+442144.3.pdf - Accepted Version
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Open Access URL: https://arxiv.org/abs/1707.05416 (Accepted version)

Abstract

We present monitoring campaign observations at optical and near-infrared (NIR) wavelengths for a radio-loud active galactic nucleus (AGN) at z = 0.840, SDSS J110006.07+442144.3 (hereafter, J1100+4421), which was identified during a flare phase in late 2014 February. The campaigns consist of three intensive observing runs from the discovery to 2015 March, mostly within the scheme of the OISTER collaboration. Optical-NIR light curves and simultaneous spectral energy distributions (SEDs) are obtained. Our measurements show the strongest brightening in 2015 March. We found that the optical-NIR SEDs of J1100+4421 show an almost steady shape despite the large and rapid intranight variability. This constant SED shape is confirmed to extend to ∼5 μm in the observed frame using the archival WISE data. Given the lack of absorption lines and the steep power-law spectrum of α ν ∼ -1.4, where fνναν, synchrotron radiation by a relativistic jet with no or small contributions from the host galaxy and the accretion disk seems most plausible as an optical-NIR emission mechanism. The steep optical-NIR spectral shape and the large amplitude of variability are consistent with this object being a low ν peak jet-dominated AGN. In addition, sub-arcsecond resolution optical imaging data taken with Subaru Hyper Suprime-Cam does not show a clear extended component and the spatial scales are significantly smaller than the large extensions detected at radio wavelengths. The optical spectrum of a possible faint companion galaxy does not show any emission lines at the same redshift, and hence a merging hypothesis for this AGN-related activity is not supported by our observations. © The Author 2017. Published by Oxford University Press on behalf of the Astronomical Society of Japan. All rights reserved.

Item Type: Article
Additional Information: This is a pre-copyedited, author-produced version of an article accepted for publication in Publications of the Astronomical Society of Japan following peer review. The version of record Morokuma, T., Tanaka, M., & Tanaka, Y.T. et al. OISTER optical and near-infrared monitoring observations of peculiar radio-loud active galactic nucleus SDSS J110006.07+442144.3, Publications of the Astronomical Society of Japan, Volume 69, Issue 5, 1 October 2017, 82, is available online at: http://dx.doi.org/10.1093/pasj/psx075
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press (OUP)
Date Deposited: 06 Aug 2018 08:34
Last Modified: 06 Aug 2018 08:34
DOI or Identification number: 10.1093/pasj/psx075
URI: http://researchonline.ljmu.ac.uk/id/eprint/9064

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