The Close AGN Reference Survey (CARS) Mrk 1018 halts dimming and experiences strong short-term variability

被引：19

作者：

Krumpe, M. ^{[1
]}

Husemann, B. ^{[2
]}

Tremblay, G. R. ^{[3
,4
]}

Urrutia, T. ^{[1
]}

Powell, M. ^{[4
]}

Davis, T. A. ^{[5
]}

Scharwachter, J. ^{[6
]}

Dexter, J. ^{[7
]}

Busch, G. ^{[8
]}

Combes, F. ^{[9
]}

Croom, S. M. ^{[10
,11
]}

Eckart, A. ^{[8
,12
]}

McElroy, R. E. ^{[10
,11
]}

Perez-Torres, M. ^{[13
]}

Leung, G. ^{[14
]}

机构：

[1] Leibniz Inst Astrophys Potsdam, Sternwarte 16, D-14482 Potsdam, Germany

[2] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[3] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[4] Yale Univ, Yale Ctr Astron & Astrophys, 52 Hillhouse Ave, New Haven, CT 06511 USA

[5] Cardiff Univ, Sch Phys & Astron, Queens Bldg, Cardiff CF24 3AA, S Glam, Wales

[6] Gemini Observ, Northern Operat Ctr, 670 N Aohoku Pl, Hilo, HI 96720 USA

[7] Max Planck Inst Extraterr Phys, Giessenbachstr 1, D-85748 Garching, Germany

[8] Univ Cologne, Phys Inst 1, Zulpicher Str 77, D-50937 Cologne, Germany

[9] Sorbonne Univ, UPMC, Observ Paris, LERMA,Coll France,PSL,CNRS, F-75014 Paris, France

[10] Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia

[11] ARC Centre Excellence All Sky Astrophys CAASTRO, Sydney, NSW, Australia

[12] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany

[13] Inst Astrofis Andalucia, Glorieta Astron S-N, Granada 18008, Spain

[14] Univ Calif San Diego, Ctr Astrophys & Space Sci, 9500 Gilman Dr, La Jolla, CA 92093 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2017年 / 607卷

基金：

英国科学技术设施理事会; 澳大利亚研究理事会; 美国国家航空航天局;

关键词：

quasars: individual: Mrk 1018; accretion; accretion disks; gaiaxies: evolution; BLACK-HOLES; TIDAL DISRUPTION; GALAXIES; QUASARS; GAS;

D O I：

10.1051/0004-6361/201731967

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

After changing optical AGN type from 1.9 to 1 in 1984, the AGN Mrk 1018 recently reverted back to its type 1.9 state. Our ongoing monitoring now reveals that the AGN has hatted its dramatic dimming, reaching a minimum around October 2016. The minimum was followed by an outburst rising with similar to 0.25 U-band mag/month. The rebrightening fasted at feast until February 2017, as confirmed by joint Chandra and Hubble observations. Monitoring was resumed in July 2017 after the source emerged from sunblock, at which point the AGN was found only similar to 0.4 mag brighter than its minimum. The intermittent outburst was accompanied by the appearance of a red wing asymmetry in broad-fine shape, indicative of an inhomogeneous broad-fine region. The current flickering brightness of Mrk 1018 following its rapid fading either suggests that the source has reignited, remains variabie at a tow level, or may continue dimming over the next few years. Distinguishing between these possibilities requires continuous multiwavelength monitoring.

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