NGC 2787
| NGC 2787 | |
|---|---|
 NGC 2787 as observed by the Hubble Space Telescope (HST). | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 09h 19m 18.5s[1] |
| Declination | +69° 12′ 12″[1] |
| Redshift | 696 ± 8 km/s[1] |
| Distance | 24 ± 4 Mly (7.5 ± 1.2 Mpc)[2] |
| Apparent magnitude (V) | 11.8[1] |
| Characteristics | |
| Type | SB(r)0+[1] |
| Apparent size (V) | 3′.2 × 2′.0[1] |
| Notable features | barred galaxy |
| Other designations | |
| UGC 4914,[1] PGC 26341[1] | |
NGC 2787 is a barred lenticular galaxy approximately 24 million light-years away in the constellation Ursa Major. In 1999, the Hubble Space Telescope took a look at NGC 2787. The supermassive black hole at the core has a mass of 4.1+0.4
−0.5×107 M☉.[3]
LINER emission
NGC 2787 contains a low-ionization nuclear emission-line region (LINER), a type of region that is characterized by spectral line emission from weakly ionized atoms.[4] LINERs are very common within lenticular galaxies, approximately one-fifth of nearby lenticular galaxies contain LINERs.[5]
References
- ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 2787. Retrieved 2006-12-13.
- ^ J. L. Tonry; A. Dressler; J. P. Blakeslee; E. A. Ajhar; et al. (2001). "The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances". Astrophysical Journal. 546 (2): 681–693. arXiv:astro-ph/0011223. Bibcode:2001ApJ...546..681T. doi:10.1086/318301.
- ^ Graham, Alister W. (November 2008), "Populating the Galaxy Velocity Dispersion - Supermassive Black Hole Mass Diagram: A Catalogue of (Mbh, σ) Values", Publications of the Astronomical Society of Australia, 25 (4): 167–175, arXiv:0807.2549, Bibcode:2008PASA...25..167G, doi:10.1071/AS08013.
- ^ L. C. Ho; A. V. Filippenko; W. L. W. Sargent (1997). "A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies". Astrophysical Journal Supplement. 112 (2): 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041.
- ^ L. C. Ho; A. V. Filippenko; W. L. W. Sargent (1997). "A Search for "Dwarf" Seyfert Nuclei. V. Demographics of Nuclear Activity in Nearby Galaxies". Astrophysical Journal. 487 (2): 568–578. arXiv:astro-ph/9704108. Bibcode:1997ApJ...487..568H. doi:10.1086/304638.
External links
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