NGC 7213 is a lenticular galaxy located in the constellation Grus. It is located at a distance of circa 70 million light-years from Earth, which, given its apparent dimensions, means that NGC 7213 is about 75,000 light-years across. [1] It was discovered by …

2004年12月1日 · We examine the XMM X-ray spectrum of the LINER-AGN NGC 7213, which is best fit with a power law, K-alpha emission lines from Fe I, Fe XXV and Fe XXVI and a soft X-ray collisionally ionised thermal...

2005年1月11日 · We present an XMM-Newton observation of the Seyfert–LINER (low-ionization nuclear emission-line region) galaxy NGC 7213. The RGS soft X-ray spectrum is well fitted with a power law plus soft X-ray collisionally ionized thermal plasma (kT = 0.18 +0.03−0.01 keV).

2017年12月14日 · We analysed the four-decades-long X-ray light curve of the low-luminosity active galactic nucleus (LLAGN) NGC 7213 and discovered a fast-rise-exponential-decay (FRED) pattern, i.e. the X-ray luminosity increased by a factor of $\approx 4$ within 200d, and then decreased exponentially with an $e$-folding time $\approx 8116$d ($\approx 22.2$ yr).

NGC 7213 is a Seyfert 1 Galaxy located in the constellation of Grus in the southern hemisphere. NGC 7213's distance from Earth is 71,754,403.09 light years. NGC 7213 is called NGC 7213 in the New General Catalogue (NGC).

NGC 7213 - A key to the nature of liners? New optical spectra of the nearby S0 galaxy NGC 7213 are analyzed. The observations are described and a brief overview of the spectrum is given. The subtraction of the stellar component is presented, and the measurement of various emission lines is discussed in detail.

2020年7月6日 · We present a multi-wavelength study (from X-ray to millimetre) of the nearby low-luminosity active galactic nucleus (LLAGN) NGC 7213. We combine the information from the different bands to characterize the source in terms of contribution from the AGN and the host-galaxy interstellar medium (ISM).

The Seyfert characteristics of NGC 7213 are reviewed, and its shock features are reconciled with photoionization models. The arguments may apply to classical Liners as well. Finally, theoretical models are explored that can help explain the relationships discovered among the emission lines.

2004年9月29日 · We examine the XMM X-ray spectrum of the low-ionisation nuclear emission-line region (LINER)-AGN NGC 7213, which is best fit with a power law, Kα emission lines from Fe I, Fe xxv and Fe xxvi and a soft X-ray collisionally ionised thermal plasma with kT = 0.18...

Abstract: We present the X-ray spectral results from the longest X-ray Multi-mirror Mission–Newton observation, 133 ks, of the low-luminosity active galactic nucleus NGC 7213. The hardness-ratio analysis of the X-ray light curves discloses a rather constant X-ray spectral shape, at least for the observed exposure time, enabling us to perform ...