NGC 2935 is a large intermediate spiral galaxy located in the constellation Hydra. Its speed relative to the cosmic microwave background is 2,601 ± 23 km/s, which corresponds to a Hubble distance of 38.4 ± 2.7 Mpc (~125 million ly). It was discovered by German-British astronomer William Herschel on 20 March 1786.[1][2]
| NGC 2935 | |
|---|---|
 NGC 2935 imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Hydra |
| Right ascension | 09h 36m 44.8615s[1] |
| Declination | −21° 07′ 41.53″[1] |
| Redshift | 0.007575[1] |
| Heliocentric radial velocity | 2271 ± 3 km/s[1] |
| Distance | 90.97 ± 2.40 Mly (27.890 ± 0.736 Mpc)[1] |
| Apparent magnitude (V) | 12.1[1] |
| Surface brightness | 23.9 mag/arcsec^2 |
| Characteristics | |
| Type | (R')SAB(s)b[1] |
| Size | ~185,200 ly (56.79 kpc) (estimated)[1] |
| Apparent size (V) | 3.7′ × 2.8′[1] |
| Other designations | |
| ESO 565- G 023, IRAS 09344-2054, UGCA 169, MCG -03-25-011, PGC 27351[1] | |
NGC 2935 was used by Gérard de Vaucouleurs as a galaxy of morphological type (R2')SAB(s)b in his galaxy atlas. The luminosity class of NGC 2935 is II and it has a broad HI line. In addition, it is a star-forming burst galaxy.[3]
To date, 29 studies and measurements based on redshift give a distance of 27.890 ± 3.962 Mpc (~91 million ly),[4] which is outside the Hubble distance values. Note that it is with the average value of independent measurements, when they exist, that the NASA/IPAC database calculates the diameter of a galaxy and that consequently the diameter of NGC 2935 could be approximately 78, 1 kpc (~255,000 ly) if we used the Hubble distance to calculate it.[5]
Nuclei disk
editObservations from the Hubble Space Telescope have concluded that a star-forming disk is present around the core of NGC 2935. The size of its semi-major axis is estimated at 530 pc (~1730 light years) at the estimated distance of this galaxy.[6]
Supernovae
editFour supernovae have been discovered in NGC 2935:
- SN 1975F (type unknown, mag. 15) was discovered on 11 June 1975, by Yvonne Dunlap and Justus R. Dunlap of the Corralitos Observatory at Northwestern University.[7][8]
- SN 1996Z (type Ia, mag. 16) was discovered on 16 May 1996 by Wayne Johnson.[9][10]
- SN 2021mwj (type II, mag. 17.7) was discovered on 21 May 2021 by ATLAS. [11]
- SN 2021aczp (type II, mag. 18.9) was discovered on 1 November 2021 by ATLAS.[12]
NGC 2935 Group
editNGC 2935 is part of a small group of three galaxies named after it. The other two galaxies in the NGC 2935 group are NGC 2983 and NGC 2986.[13]
See also
editExternal links
editReferences
edit- ^ a b c d e f g h i j k "Results for object NGC 2935". ned.ipac.caltech.edu. Retrieved 2024-06-05.
- ^ Seligman, Courtney. "New General Catalogue Objects: NGC 2935". Celestial Atlas. Retrieved 24 November 2024.
- ^ "Revised data from NGC and IC catalogue by Wolfgang Steinickle, NGC 2900 to NGC 2999". astrovalleyfield.ca. Retrieved 2024-06-05.
- ^ "New General Catalog Objects: NGC 2900 - 2949". cseligman.com. Retrieved 2024-06-05.
- ^ "Gérard de Vaucouleurs' Atlas of Galaxies". cseligman.com. Retrieved 2024-06-05.
- ^ Comerón, S.; Knapen, J. H.; Beckman, J. E.; Laurikainen, E.; Salo, H.; Martínez-Valpuesta, I.; Buta, R. J. "AINUR: Atlas of Images of NUclear Rings". academic.oup.com. Retrieved 2024-06-06.
- ^ Dunlap, J. R.; Dunlap, Y. (1975). "Supernovae". International Astronomical Union Circular (2782): 1. Bibcode:1975IAUC.2782....1D.
- ^ "SN 1975F". Transient Name Server. IAU. Retrieved 24 November 2024.
- ^ Johnson, W.; Benetti, S.; Turatto, M.; Moehler, S.; Garnavich, P.; Riess, A.; Kirshner, R.; Jansen, R.; Barton, E. (1996). "Supernova 1996Z in NGC 2935". International Astronomical Union Circular (6401): 1. Bibcode:1996IAUC.6401....1J.
- ^ "SN 1996Z". Transient Name Server. IAU. Retrieved 18 August 2024.
- ^ "SN 2021mwj". Transient Name Server. IAU. Retrieved 18 August 2024.
- ^ "SN 2021aczp". Transient Name Server. IAU. Retrieved 18 August 2024.
- ^ "List of nearby galaxy groups". atunivers.free.fr. Retrieved 2024-06-06.