Measurement of coronal properties of Seyfert galaxies from NuSTAR’s hard X-ray spectrum
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Astrophysics and Astronomy"
DOI: 10.1007/s12036-017-9502-5
Abstract: Precise measurement of the coronal properties of Active Galactic Nuclei (AGN) requires the availability of high signal-to-noise ratio data covering a wide range of X-ray energies. The Nuclear Spectroscopic Telescope Array (NuSTAR) which is highly… read more here.
Keywords: measurement coronal; coronal properties; seyfert galaxies; ray spectrum ... See more keywords
Probing narrow-line Seyfert 1 galaxies in the southern hemisphere
Sign Up to like & getrecommendations! Published in 2018 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201832678
Abstract: We present a new accurate catalog of narrow-line Seyfert 1 galaxies (NLS1s) in the southern hemisphere from the Six-degree Field Galaxy Survey (6dFGS) final data release, which is currently the most extensive spectroscopic survey available… read more here.
Keywords: probing narrow; seyfert galaxies; southern hemisphere; line seyfert ... See more keywords
Broadband X-ray observations of four gamma-ray narrow-line Seyfert 1 galaxies
Sign Up to like & getrecommendations! Published in 2019 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201935929
Abstract: Narrow-line Seyfert 1 galaxies (NLS1s) is one of the few classes of active galactic nuclei (AGN) harboring powerful relativistic jets and detected in $\gamma$ rays. NLS1s are well-known X-ray sources. While in non-jetted sources the… read more here.
Keywords: narrow line; line; seyfert galaxies; line seyfert ... See more keywords
Modelling the variable emission states of γ-ray emitting narrow-line seyfert 1 galaxies
Sign Up to like & getrecommendations! Published in 2023 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stad1393
Abstract: γ-ray-emitting narrow-line Seyfert 1 galaxies (γ-NLS1) constitute an intriguing small population of Active Galactic Nuclei with γ-ray emission resembling low power flat-spectrum radio quasars (FSRQ), but with differing physical properties. They are jetted, γ/radio-loud Seyfert… read more here.
Keywords: emission states; emission; seyfert galaxies; line ... See more keywords
Mildly suppressed star formation in central regions of MaNGA Seyfert galaxies
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty2662
Abstract: Negative feedback from accretion onto super-massive black holes (SMBHs), that is to remove gas and suppress star formation in galaxies, has been widely suggested. However, for Seyfert galaxies which harbor less active, moderately accreting SMBHs… read more here.
Keywords: seyfert galaxies; star formation; mildly suppressed; star ... See more keywords
Revisiting the long term X-ray spectral evolution of Seyfert 1 galaxies
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz3217
Abstract: Characterizing the long-term variability of AGNs is a key legacy of RXTE. We carry out a spectral analysis on a sample of 20 Seyfert 1 galaxies, which had been observed by the RXTE for at… read more here.
Keywords: term; long term; seyfert galaxies; spectral evolution ... See more keywords
Estimate of SMBH Spin for Narrow-Line Seyfert 1 Galaxies
Sign Up to like & getrecommendations! Published in 2023 at "Universe"
DOI: 10.3390/universe9040175
Abstract: We estimated the spin values of the supermassive black holes (SMBHs) of the active galactic nuclei (AGN) for a large set of Narrow Line Seyfert 1 (NLS1) galaxies assuming the inclination angle between the line… read more here.
Keywords: narrow line; seyfert galaxies; spin; line ... See more keywords