|
ИСТИНА |
Войти в систему Регистрация |
Интеллектуальная Система Тематического Исследования НАукометрических данных |
||
Variability and the Size-Luminosity Relation of the Intermediate-mass AGN in NGC 4395статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 27 мая 2020 г.
- Авторы: Cho Hojin, Woo Jong-Hak, Hodges-Kluck Edmund, Son Donghoon, Shin Jaejin, Gallo Elena, Bae Hyun-Jin, Brink Thomas G., Cho Wanjin, Filippenko Alexei V., Horst John C., Ilić Dragana, Joner Michael D., Kang Daeun, Kang Wonseok, Kaspi Shai, Kim Taewoo, Kovačević Andjelka B., Kumar Sahana, Anh Le Huynh, Nadzhip A.E., Pozo Nuñez Francisco, Metlov V.G., Oknyansky V.L., Park Songyoun, Popović Luka č., Rakshit Suvendu, Schramm Malte, Shatsky N.I., Spencer Michelle, Sung Eon-Chang, Sung Hyun-il, Tatarnikov A.M., Vince Oliver
- Журнал: Astrophysical Journal
- Том: 892
- Номер: 2
- Год издания: 2020
- Издательство: University of Chicago Press
- Местоположение издательства: United States
- Первая страница: 93
- Последняя страница: 110
- DOI: 10.3847/1538-4357/ab7a98
- Аннотация: We present a variability study of the lowest-luminosity Seyfert 1 nucleus of the galaxy NGC 4395 based on photometric monitoring campaigns in 2017 and 2018. Using 22 ground-based and space telescopes, we monitored NGC 4395 with a ∼5-minute cadence during a period of 10 days and obtained light curves in the ultraviolet (UV), V, J, H, and K/Ks bands, as well as narrowband Hα. The rms variability is ∼0.13 mag in the Swift UVM2 and V filter light curves, decreasing down to ∼0.01 mag in the K filter. After correcting for the continuum contribution to the Hα narrow band, we measured the time lag of the Hα emission line with respect to the V-band continuum as 55-31+27 - 122-67+33 minutes in 2017 and 49-14+15 - 83-14+13 minutes in 2018, depending on assumptions about the continuum variability amplitude in the Hα narrow band. We obtained no reliable measurements for the continuum-to-continuum lag between UV and V bands and among near-IR bands, owing to the large flux uncertainty of UV observations and the limited time baseline. We determined the active galactic nucleus (AGN) monochromatic luminosity at 5100 Å, λ{Lλ}=(5.75± 0.40)× 1039 erg s-1, after subtracting the contribution of the nuclear star cluster. While the optical luminosity of NGC 4395 is two orders of magnitude lower than that of other reverberation-mapped AGNs, NGC 4395 follows the size-luminosity relation, albeit with an offset of 0.48 dex (≥2.5σ) from the previous best-fit relation of Bentz et al.
- Добавил в систему: Татарников Андрей Михайлович