Outflowing gas in a compact ionization cone in the Seyfert 2 galaxy ESO 153-G20
| العنوان: | Outflowing gas in a compact ionization cone in the Seyfert 2 galaxy ESO 153-G20 |
|---|---|
| المؤلفون: | D. Michael Crenshaw, Allan Schnorr-Müller, Steven B. Kraemer, R. Slater, Henrique R. Schmitt, Travis Fischer, Pedro K. Humire, Thaisa Storchi-Bergmann, Pamela Soto-Pinto, C. Finlez, Venkatessh Ramakrishnan, Martin Elvis, Dania Muñoz-Vergara, Rogemar A. Riffel, Andrew Robinson, Neil M. Nagar, D. Lena |
| المصدر: | Monthly Notices of the Royal Astronomical Society, 489, 4111-4124 Monthly Notices of the Royal Astronomical Society, 489, 3, pp. 4111-4124 |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Physics, 010308 nuclear & particles physics, Astronomy, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Galaxy, Cone (topology), Space and Planetary Science, Ionization, 0103 physical sciences, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics |
| الوصف: | We present two-dimensional ionized gas and stellar kinematics in the inner 1.4 × 1.9 kpc2 of the Seyfert 2 galaxy ESO 153-G20 obtained with the Gemini-South/Gemini multi-object spectrograph integral field unit (GMOS-IFU) at a spatial resolution of ~250 pc and spectral resolution of 36 km s−1. Strong [O iii], Hα, [N ii] and [S ii] emission lines are detected over the entire field of view. The stellar kinematics trace circular rotation with a projected velocity amplitude of ±96 km s−1, a kinematic major axis in position angle of 11°, and an average velocity dispersion of 123 km s−1. To analyse the gas kinematics, we used aperture spectra, position–velocity diagrams and single/double Gaussian fits to the emission lines. All lines show two clear kinematic components: a rotating component that follows the stellar kinematics, and a larger-dispersion component, close to the systemic velocity (from which most of the [O iii] emission comes), mainly detected to the south-west. We interpret this second component as gas outflowing at ∼400 km s−1 in a compact (300 pc) ionization cone with a half-opening angle ≤40°. The counter-cone is probably obscured behind a dust lane. We estimate a mass outflow rate of 1.1 M$\odot$ yr−1, 200 times larger than the estimated accretion rate on to the supermassive black hole, and a kinetic to radiative power ratio of 1.7 × 10−3. Bar-induced perturbations probably explain the remaining disturbances observed in the velocity field of the rotating gas component. |
| وصف الملف: | application/pdf |
| تدمد: | 0035-8711 4111-4124 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88609ff1aab063023f27ae381336e67b https://hdl.handle.net/2066/208877 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....88609ff1aab063023f27ae381336e67b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00358711 41114124 |
|---|