Astronomy:UGC 3855
| UGC 3855 | |
|---|---|
 UGC 3855 and a foreground star imaged by the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Lynx |
| Right ascension | 07h 28m 12.8469s[1] |
| Declination | +58° 30′ 22.881″[1] |
| Redshift | 0.010564±0.0000270[1] |
| Helio radial velocity | 3,167±8 km/s[1] |
| Distance | 130.95 ± 11.37 Mly (40.150 ± 3.486 Mpc)[1] |
| Characteristics | |
| Type | Sab[1] |
| Size | ~93,200 ly (28.59 kpc) (estimated)[1] |
| Other designations | |
| IRAS F07239+5836, MCG+10-11-052, PGC 21067[1] | |
UGC 3855, also known as PGC 21067 or sometimes as the Modest galaxy, is a spiral galaxy in the constellation of Lynx.[2][3] Its velocity with respect to the cosmic microwave background is 3,236±9 km/s,[1] which corresponds to a Hubble distance of 155.7 ± 10.9 Mly (47.73 ± 3.35 Mpc). However, 4 non-redshift measurements give a closer mean distance of 130.95 ± 11.37 Mly (40.150 ± 3.486 Mpc).[4] The first known reference to this galaxy comes from Part 1 of the Morphological Catalogue of Galaxies, published in 1962, where it is listed as MCG +10-11-052.[5]
It is a relatively old galaxy with a stellar population around 10.6 billion years old. It also has a low rate of star formation of about 0.2 solar masses per year.[6]
Supernova
One supernova has been observed in UGC 3855: SN 2021agco (Type Ib, mag. 17.6) was discovered by the Xingming Observatory Sky Survey (XOSS) on 5 December 2021.[7] It is the closest ultra-stripped supernova yet discovered.[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 "Results for object UGC 03855". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=UGC+03855.
- ↑ information@eso.org. "The Modest Galaxy" (in en). https://www.esahubble.org/images/potw2105a/.
- ↑ Ford, Dominic. "UGC 3855 (Galaxy)" (in en). https://in-the-sky.org//data/object.php?amp=1&id=UGC_3855.
- ↑ "Distance Results for UGC 03855". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+03855.
- ↑ Vorontsov-Vel'Yaminov, B. A.; Arkhipova, V. P. (1962). "Morphological catalogue of galaxies. Part 1". Morphological Catalogue of Galaxies C01. Bibcode: 1962MCG...C01....0V.
- ↑ 6.0 6.1 Yan, Shengyu; Wang, Xiaofeng; Gao, Xing; Zhang, Jujia; Filippenko, Alexei V.; Brink, Thomas G.; Mo, Jun; Lin, Weili et al. (2023-12-01). "Discovery of the Closest Ultra-stripped Supernova: SN 2021agco in UGC 3855". The Astrophysical Journal Letters 959 (2): L32. doi:10.3847/2041-8213/ad0cc3. ISSN 2041-8205. Bibcode: 2023ApJ...959L..32Y.
- ↑ "SN 2021agco". IAU. https://www.wis-tns.org/object/2021agco.
External links
- UGC 3855 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Coordinates: 
07h 28m 12.8469s, +58° 30′ 22.881″
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