Applications of Math Microscope in the Event Horizon Telescope
Evgeni Nikolaevich Terentiev,
Nikolay Evgenyevich Shilin-Terentyev
Issue:
Volume 9, Issue 2, June 2021
Pages:
21-31
Received:
18 October 2020
Accepted:
7 November 2020
Published:
30 June 2021
Abstract: The paper describes the insides - the basic concepts of the Math Microscope, demonstrates the results of Super-Resolution images obtained from the Event Horizon Telescope and analyzes the results of the movement of clusters of stars that go around the Black Hole. The presence of point objects - single stars in the SR image allowed us to implement a new breakthrough approach in the problem of SR images of Powehi Black Hole in the concept of MM. In the paper, we reviewed and illustrated new concepts: Invertability Indicators and Adequacy Characteristics of discrete Models of Apparatus Functions. With these new concepts, in the inverse problem, for the first time, we were able to answer simple questions: What are we dealing with? Moreover, have we solved the inverse problem? The paper demonstrates the “manual solution” of the problem of Reconstruction of AFs and Super-Resolution on MM. In the Discussion at the end of the paper, we pose the problem of creating two Artificial Intelligences for the automated solution of the R&SR problem with the interpretation of the SR results of BH images from EHT.
Abstract: The paper describes the insides - the basic concepts of the Math Microscope, demonstrates the results of Super-Resolution images obtained from the Event Horizon Telescope and analyzes the results of the movement of clusters of stars that go around the Black Hole. The presence of point objects - single stars in the SR image allowed us to implement a...
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The Nature of Accretion in Seyfert Galaxies
Nwankwo Ifeanyi Francis,
Ogwo Jemima Ngozi
Issue:
Volume 9, Issue 2, June 2021
Pages:
32-36
Received:
22 June 2021
Accepted:
7 July 2021
Published:
27 July 2021
Abstract: We present statistical results from a sample of 91,006 Seyfert galaxies obtained from SDSS DR14 (Sloan Digital Sky Survey Data Release 14). Using the ratio of the flux of doubly ionized oxygen [OIII] to that of the flux of hydrogen beta line Hβ, the Seyfert galaxy sample was separated into Seyferts 1 and 2. For each class of Seyfert galaxy, both bolometric luminosity and Eddington luminosity were calculated and these results were used to investigate the nature of accretion in both classes by estimating their Eddington ratios. The susceptibility of the [OIII] line to reddening necessitated its being extinction corrected before calculating bolometric luminosity from Lbol=3500L[OIII]. Our work shows that Seyfert 2 galaxies are 10 times more luminous than their Seyfert 1 counterparts. We also found Seyfert 2 galaxies to be centrally more massive than Seyfert 1 galaxies as a result of which Eddington ratio is less in Seyfert 1 galaxies. These results show that both Seyferts 1and 2 galaxies are powered by thick accretion disk and as such undergo predominantly super-Eddington accretion. Only a negligible percent of them (0.49% for Seyfert 1 galaxies and 0.28% for Seyfert 2 galaxies) are powered by thin accretion disk. Our results also indicate that black hole growth in both Seyfert 1 and Seyfert 2 galaxies is dominated by super-Eddington accretion rather than sub-Eddington accretion showing that though both Seyfert classes are good accretors, Seyfert 2 galaxies are better accretors and this means that Seyferts of thin accretion disks are still in the low-Eddington accretion era.
Abstract: We present statistical results from a sample of 91,006 Seyfert galaxies obtained from SDSS DR14 (Sloan Digital Sky Survey Data Release 14). Using the ratio of the flux of doubly ionized oxygen [OIII] to that of the flux of hydrogen beta line Hβ, the Seyfert galaxy sample was separated into Seyferts 1 and 2. For each class of Seyfert galaxy, both bo...
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