Galaxy in the constellation Indus
NGC 7007 is a lenticular galaxy with a small bar , around 100 million light-years away from Earth in the constellation Indus . It was discovered by astronomer John Herschel on July 8, 1834. The galaxy is a type 2 seyfert galaxy , and is host to a supermassive black hole with an estimated mass of 4.9 × 10 M ☉
Like all lenticular galaxies, NGC 7007 has a classical disk similar to most galaxies of its type, having a nearly spherical bulge. Unlike most galaxies of its type, the pattern of dust in NGC 7007 is not circular and continuous surrounding the bulge but shows breaks in its structure. These dust lanes also appear to form dusty spiral arms similar to the Sa galaxies NGC 2855 , NGC 4984 , and NGC 7377 .
NGC 7007 is an isolated galaxy , with it a part of the Telescopium−Grus Cloud , a galaxy filament .
Counter-rotating disk
In NGC 7007, there is counter-rotating disk of ionized gas that counter-rotates with respect to the stars. This indicates an external origin of the gas such as accretion .
See also
References
^ "NASA/IPAC Extragalactic Database" . Results for NGC 7007 . Retrieved 2017-04-23.
Leroy, Adam K.; Sandstrom, Karin M.; Lang, Dustin; Lewis, Alexia; Salim, Samir; Behrens, Erica A.; Chastenet, Jérémy; Chiang, I-Da; Gallagher, Molly J.; Kessler, Sarah; Utomo, Dyas (2019-10-01). "A z = 0 Multiwavelength Galaxy Synthesis. I. A WISE and GALEX Atlas of Local Galaxies" . The Astrophysical Journal Supplement Series . 244 (2): 24. arXiv :1910.13470 . Bibcode :2019ApJS..244...24L . doi :10.3847/1538-4365/ab3925 . ISSN 0067-0049 .
^ "Your NED Search Results" . ned.ipac.caltech.edu . Retrieved 2017-04-23.
Sil'chenko, Olga K.; Kniazev, Alexei Yu.; Chudakova, Ekaterina M. (2020-08-01). "The Structure of Stellar Disks in Isolated Lenticular Galaxies" . The Astronomical Journal . 160 (2): 95. arXiv :2007.01129 . Bibcode :2020AJ....160...95S . doi :10.3847/1538-3881/ab9eaf . ISSN 0004-6256 .
Rojas, Sebastián García. "Galaxy NGC 7007 Deep Sky Objects Browser" . DSO Browser . Archived from the original on 2017-05-20. Retrieved 2017-04-23.
"New General Catalog Objects: NGC 7000 - 7049" . cseligman.com . Retrieved 2017-04-15."NGC 7007" . simbad.u-strasbg.fr . Retrieved 2024-08-17.Arzoumanian, Zaven; Baker, Paul T.; Brazier, Adam; Brook, Paul R.; Burke-Spolaor, Sarah; Becsy, Bence; Charisi, Maria; Chatterjee, Shami; Cordes, James M.; Cornish, Neil J.; Crawford, Fronefield; Cromartie, H. Thankful; Decesar, Megan E.; Demorest, Paul B.; Dolch, Timothy (2021-06-01). "The NANOGrav 11 yr Data Set: Limits on Supermassive Black Hole Binaries in Galaxies within 500 Mpc" . The Astrophysical Journal . 914 (2): 121. arXiv :2101.02716 . Bibcode :2021ApJ...914..121A . doi :10.3847/1538-4357/abfcd3 . ISSN 0004-637X .
Sandage, Allan; Bedke, John (1994-01-01). The Carnegie atlas of galaxies Bibcode :1994cag..book.....S .
"Your NED Search Results" . ned.ipac.caltech.edu . Retrieved 2024-08-17.Tully, R. Brent (1988). Nearby galaxies catalog . Cambridge; New York: Cambridge University Press. ISBN 978-0-521-35299-4
Dettmar, Ralf-Juergen; Jullien-Dettmar, Marlies; Barteldrees, Andreas (1 July 1990). "Observations of extended and counterrotating disks of ionized gas in SO galaxies*" (PDF). Nasa, Ames Research Center, the Interstellar Medium in External Galaxies: Summaries of Contributed Papers .
External links
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Lenticular galaxy NGC 7007.
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