A Comparison of Supermassive Black Hole Mass of NGC 4151 Using Different Methods

passer ◽  
2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Ismaeel Al-Baidhany

Author(s):  
Ismaeel A Al-Baidhany ◽  
Sami S Chiad ◽  
Wasmaa A Jabbar ◽  
Rasha A Hussein ◽  
Firas F K Hussain ◽  
...  


2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Marc S. Seigar

We investigate the dark matter halo density profile of M33. We find that the HI rotation curve of M33 is best described by an NFW dark matter halo density profile model, with a halo concentration of and a virial mass of . We go on to use the NFW concentration of M33, along with the values derived for other galaxies (as found in the literature), to show that correlates with both spiral arm pitch angle and supermassive black hole mass.



2009 ◽  
Vol 400 (4) ◽  
pp. 1803-1807 ◽  
Author(s):  
Y. Watabe ◽  
N. Kawakatu ◽  
M. Imanishi ◽  
T. T. Takeuchi


2007 ◽  
Vol 670 (1) ◽  
pp. 105-115 ◽  
Author(s):  
Christopher A. Onken ◽  
Monica Valluri ◽  
Bradley M. Peterson ◽  
Richard W. Pogge ◽  
Misty C. Bentz ◽  
...  


2017 ◽  
Vol 473 (3) ◽  
pp. 3818-3834 ◽  
Author(s):  
Timothy A. Davis ◽  
Martin Bureau ◽  
Kyoko Onishi ◽  
Freeke van de Voort ◽  
Michele Cappellari ◽  
...  


2020 ◽  
Vol 6 (12) ◽  
pp. eaaz1310 ◽  
Author(s):  
Michael D. Johnson ◽  
Alexandru Lupsasca ◽  
Andrew Strominger ◽  
George N. Wong ◽  
Shahar Hadar ◽  
...  

The Event Horizon Telescope image of the supermassive black hole in the galaxy M87 is dominated by a bright, unresolved ring. General relativity predicts that embedded within this image lies a thin “photon ring,” which is composed of an infinite sequence of self-similar subrings that are indexed by the number of photon orbits around the black hole. The subrings approach the edge of the black hole “shadow,” becoming exponentially narrower but weaker with increasing orbit number, with seemingly negligible contributions from high-order subrings. Here, we show that these subrings produce strong and universal signatures on long interferometric baselines. These signatures offer the possibility of precise measurements of black hole mass and spin, as well as tests of general relativity, using only a sparse interferometric array.



2019 ◽  
Vol 877 (2) ◽  
pp. 65 ◽  
Author(s):  
Prantik Nandi ◽  
Sandip K. Chakrabarti ◽  
Santanu Mondal




2009 ◽  
Vol 704 (2) ◽  
pp. 1135-1145 ◽  
Author(s):  
Kaushala Bandara ◽  
David Crampton ◽  
Luc Simard


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