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NGC 1549

January 01, 1970

NGC 1549 is an elliptical galaxy located in the constellation Dorado. It is located at a distance of about 50 million light years from Earth, which, given its apparent dimensions, means that NGC 1549 is about 75,000 light years across. NGC 1549 was discovered by John Herschel on 6 December 1835 and may have been observed by James Dunlop in 1826.[2] It is a member of the Dorado Group.

NGC 1549
NGC 1549 (top) and NGC 1553 (bottom) by legacy surveys
Observation data (J2000 epoch)
ConstellationDorado
Right ascension04h 15m 45.1s[1]
Declination−55° 35′ 32″[1]
Redshift0.004190 ± 0.000040 [1]
Heliocentric radial velocity1,256 ± 12 km/s[1]
Distance51.2 ± 14 Mly (15.7 ± 4.4 Mpc)[1]
Group or clusterDorado Group
Apparent magnitude (V)9.6
Characteristics
TypeE0-1 [1]
Apparent size (V)4.9′ × 4.1′[1]
Other designations
ESO 157-G16, AM 0414-554, PGC 14757[1]

In the centre of NGC 1549 is expected to lie a supermassive black hole, whose mass is estimated to be between 390 and 810 million (108.76+0.15
−0.17) M☉ based on the Sérsic index of the galaxy.[3] No polycyclic aromatic hydrocarbons (PAHs) emission, an indicator for the presence of interstellar dust, was detected by the Infrared Spectrograph onboard Spitzer Space Telescope.[4] NGC 1549 has been found to emit X-rays, with its total flux exceeding 2×1040 ergs s–1 for the 0.3–5 keV band.[5] A total number of 150 globular clusters are estimated to exist in NGC 1549, a number low compared to similar size galaxies.[6] The outer isophotes of the galaxy appear twisted and feature faint shells.[7]

NGC 1549 forms an interacting pair with the lenticular galaxy NGC 1553, which lies 12 arcminutes to the south.[8] It is the largest elliptical galaxy in a moderate size galaxy group known as the Dorado Group.[9]

References edit

  1. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 1549. Retrieved 2016-01-18.
  2. ^ Seligman, Courtney. "NGC 1549 (= PGC 14757)". Celestial Atlas. Retrieved 19 November 2018.
  3. ^ Mutlu-Pakdil, Burçin; Seigar, Marc S.; Davis, Benjamin L. (17 October 2016). "The local black hole mass function derived from the MBH-P and the MBH-n relations". The Astrophysical Journal. 830 (2): 117. arXiv:1607.07325. Bibcode:2016ApJ...830..117M. doi:10.3847/0004-637X/830/2/117. S2CID 118586684.
  4. ^ Kaneda, H.; Onaka, T.; Sakon, I.; Kitayama, T.; Okada, Y.; Suzuki, T. (September 2008). "Properties of Polycyclic Aromatic Hydrocarbons in Local Elliptical Galaxies Revealed by the Infrared Spectrograph on Spitzer". The Astrophysical Journal. 684 (1): 270–281. arXiv:0805.3257. Bibcode:2008ApJ...684..270K. doi:10.1086/590243. S2CID 14065147.
  5. ^ Diehl, Steven; Statler, Thomas S. (10 October 2007). "The Hot Interstellar Medium of Normal Elliptical Galaxies. I. A Chandra Gas Gallery and Comparison of X-Ray and Optical Morphology". The Astrophysical Journal. 668 (1): 150–167. arXiv:astro-ph/0606215. Bibcode:2007ApJ...668..150D. doi:10.1086/521009. S2CID 14507041.
  6. ^ Bridges, Terry J.; Hanes, David A. (April 1990). "Globular clusters in the interacting galaxies NGC 1549 and NGC 1553". The Astronomical Journal. 99: 1100. Bibcode:1990AJ.....99.1100B. doi:10.1086/115399.
  7. ^ Franx, Marijn; Illingworth, Garth; Heckman, Timothy (August 1989). "Multicolor surface photometry of 17 ellipticals" (PDF). The Astronomical Journal. 98: 538. Bibcode:1989AJ.....98..538F. doi:10.1086/115157. hdl:1887/6554.
  8. ^ de Vaucouleurs, G.; de Vaucouleurs, A.; Corwin, J. R. (1976). "Second reference catalogue of bright galaxies". Second Reference Catalogue of Bright Galaxies. 1976. Bibcode:1976RC2...C......0D.
  9. ^ Kilborn, V. A.; Koribalski, B. S.; Forbes, D. A.; Barnes, D. G.; Musgrave, R. C. (1 January 2005). "A wide-field HI study of the NGC 1566 group". Monthly Notices of the Royal Astronomical Society. 356 (1): 77–88. arXiv:astro-ph/0409743. Bibcode:2005MNRAS.356...77K. doi:10.1111/j.1365-2966.2004.08450.x.

External links edit

  •   Media related to NGC 1549 at Wikimedia Commons
  • NGC 1549 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
  • NGC 1549 on SIMBAD


January 01, 1970
1549, elliptical, galaxy, located, constellation, dorado, located, distance, about, million, light, years, from, earth, which, given, apparent, dimensions, means, that, about, light, years, across, discovered, john, herschel, december, 1835, have, been, observ. NGC 1549 is an elliptical galaxy located in the constellation Dorado It is located at a distance of about 50 million light years from Earth which given its apparent dimensions means that NGC 1549 is about 75 000 light years across NGC 1549 was discovered by John Herschel on 6 December 1835 and may have been observed by James Dunlop in 1826 2 It is a member of the Dorado Group NGC 1549NGC 1549 top and NGC 1553 bottom by legacy surveysObservation data J2000 epoch ConstellationDoradoRight ascension04h 15m 45 1s 1 Declination 55 35 32 1 Redshift0 004190 0 000040 1 Heliocentric radial velocity1 256 12 km s 1 Distance51 2 14 Mly 15 7 4 4 Mpc 1 Group or clusterDorado GroupApparent magnitude V 9 6CharacteristicsTypeE0 1 1 Apparent size V 4 9 4 1 1 Other designationsESO 157 G16 AM 0414 554 PGC 14757 1 In the centre of NGC 1549 is expected to lie a supermassive black hole whose mass is estimated to be between 390 and 810 million 108 76 0 15 0 17 M based on the Sersic index of the galaxy 3 No polycyclic aromatic hydrocarbons PAHs emission an indicator for the presence of interstellar dust was detected by the Infrared Spectrograph onboard Spitzer Space Telescope 4 NGC 1549 has been found to emit X rays with its total flux exceeding 2 1040 ergs s 1 for the 0 3 5 keV band 5 A total number of 150 globular clusters are estimated to exist in NGC 1549 a number low compared to similar size galaxies 6 The outer isophotes of the galaxy appear twisted and feature faint shells 7 NGC 1549 forms an interacting pair with the lenticular galaxy NGC 1553 which lies 12 arcminutes to the south 8 It is the largest elliptical galaxy in a moderate size galaxy group known as the Dorado Group 9 References edit a b c d e f g h NASA IPAC Extragalactic Database Results for NGC 1549 Retrieved 2016 01 18 Seligman Courtney NGC 1549 PGC 14757 Celestial Atlas Retrieved 19 November 2018 Mutlu Pakdil Burcin Seigar Marc S Davis Benjamin L 17 October 2016 The local black hole mass function derived from the MBH P and the MBH n relations The Astrophysical Journal 830 2 117 arXiv 1607 07325 Bibcode 2016ApJ 830 117M doi 10 3847 0004 637X 830 2 117 S2CID 118586684 Kaneda H Onaka T Sakon I Kitayama T Okada Y Suzuki T September 2008 Properties of Polycyclic Aromatic Hydrocarbons in Local Elliptical Galaxies Revealed by the Infrared Spectrograph on Spitzer The Astrophysical Journal 684 1 270 281 arXiv 0805 3257 Bibcode 2008ApJ 684 270K doi 10 1086 590243 S2CID 14065147 Diehl Steven Statler Thomas S 10 October 2007 The Hot Interstellar Medium of Normal Elliptical Galaxies I A Chandra Gas Gallery and Comparison of X Ray and Optical Morphology The Astrophysical Journal 668 1 150 167 arXiv astro ph 0606215 Bibcode 2007ApJ 668 150D doi 10 1086 521009 S2CID 14507041 Bridges Terry J Hanes David A April 1990 Globular clusters in the interacting galaxies NGC 1549 and NGC 1553 The Astronomical Journal 99 1100 Bibcode 1990AJ 99 1100B doi 10 1086 115399 Franx Marijn Illingworth Garth Heckman Timothy August 1989 Multicolor surface photometry of 17 ellipticals PDF The Astronomical Journal 98 538 Bibcode 1989AJ 98 538F doi 10 1086 115157 hdl 1887 6554 de Vaucouleurs G de Vaucouleurs A Corwin J R 1976 Second reference catalogue of bright galaxies Second Reference Catalogue of Bright Galaxies 1976 Bibcode 1976RC2 C 0D Kilborn V A Koribalski B S Forbes D A Barnes D G Musgrave R C 1 January 2005 A wide field HI study of the NGC 1566 group Monthly Notices of the Royal Astronomical Society 356 1 77 88 arXiv astro ph 0409743 Bibcode 2005MNRAS 356 77K doi 10 1111 j 1365 2966 2004 08450 x External links edit nbsp Media related to NGC 1549 at Wikimedia Commons NGC 1549 on WikiSky DSS2 SDSS GALEX IRAS Hydrogen a X Ray Astrophoto Sky Map Articles and images NGC 1549 on SIMBAD Retrieved from https en wikipedia org w index php title NGC 1549 amp oldid 1186876612, wikipedia, wiki, book, books, library,

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