NGC 5273
NGC 5273 | |
---|---|
Observation data (J2000 epoch) | |
Right ascension | 13h 42m 08.380s[1] |
Declination | +35° 39′ 15.47″[1] |
Redshift | 0.00362[2] |
Distance | 54.1 ± 6.8 Mly (16.6 ± 2.1 Mpc)[3][4] |
Apparent magnitude (V) | 11.6[5] 13.12[6] |
Apparent magnitude (B) | 14.01[6] |
Characteristics | |
Type | SA0(s)[4] |
Apparent size (V) | 2.8′ × 2.4′[5] |
Other designations | |
NGC 5273, UGC 8675, PGC 48521[7] |
NGC 5273 is a lenticular galaxy located 54 million light-years[4] away in the northern constellation of Canes Venatici. This galaxy was discovered by William Herschel on May 1, 1785.[8] It is positioned 1+1⁄4° to the southeast of the star 25 Canum Venaticorum.[5]
The morphological classification of this galaxy is SA0(s),[4] indicating it is lenticular in form. It displays a faint, unbarred spiral structure within a generally elliptical profile.[9] NGC 5273 is classified as a type 1.5 Seyfert galaxy, with the X-ray emission from its active galactic nucleus undergoing significant absorption.[10] However, data collected between the year 2000 and 2022 suggest this is a changing–look Seyfert, with the type ranging from 1 to 1.8/1.9.[11] The activity level shows strong variability, allowing reverberation mapping of the supermassive black hole at the core. This object has an estimated mass of (4.7±1.6)×106 M☉.[9]
References
- ^ S2CID 244398875. Gaia DR3 record for this source at VizieR.
- .
- S2CID 250737862, 50.
- ^ , 13.
- ^ ISBN 9780521858939.
- ^ .
- ^ "NGC 5273", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2023-11-07.
- ^ Seligman, Courtney, "NGC Objects: NGC 5250 - 5299", Celestial Atlas, retrieved 2023-11-10.
- ^ S2CID 118540233, 8.
- S2CID 118395311.
- .
Further reading
- Vincentelli, F. M.; et al. (February 2020), "X-ray reverberation lags from the 1.5 Seyfert galaxy NGC 5273", Monthly Notices of the Royal Astronomical Society, 492 (1): 1135–1141, .
- Chromey, F. R. (November 1973), "Studies of Ir II galaxies. I. NGC 4753 and NGC 5273", Astronomy and Astrophysics, 29: 77–84, Bibcode:1973A&A....29...77C.