Astronomy:MACS1149-JD1
| MACS1149-JD1 | |
|---|---|
 Hubble and ALMA image of galaxy cluster MACS J1149.5+2223 with an inset of MACS1149-JD1 | |
| Observation data (J2000 epoch) | |
| Constellation | Leo |
| Right ascension | 11h 49m 33.584s |
| Declination | +22° 24′ 45.78″ |
| Redshift | 9.1096±0.0006[1] |
| Helio radial velocity | 2878008±59958 km/s[2] |
| Distance | 30.37 Gly (9.311 Gpc)[3] (co-moving) 13.28 Gly (4.07 Gpc)[4] (light travel) |
| Group or cluster | MACS J1149.5+2223 |
| Apparent magnitude (V) | 26.8[3] |
| Characteristics | |
| Type | Dwarf |
| Mass | 1.1+0.5 −0.2×109[1] M☉ |
| Size | 3,000 ly (diameter) |
| Apparent size (V) | 0.00075 x 0.00035 |
| Other designations | |
| [PCB2012] 3020, [KOI2016] HFF4C-YJ1, [ZZI2017] 663[5] | |
MACS1149-JD1 (also known as JD1 and PCB2012 3020) is a young galaxy that is known for being one of the farthest known galaxies from Earth. It was discovered in 2014 and confirmed in 2018.[6] The JD1 galaxy is at a redshift of about z=9.11,[1] or about 13.28 billion ly (4.07 billion pc) away from Earth meaning that it formed when the universe was around 500 million years old.[4][7]
The carbon and neon abundances of JD1 are below the solar abundance ratio. The under-abundance of carbon suggests recent star formation where a Type II supernova enriched the interstellar medium (ISM) with oxygen, but intermediate mass stars have not yet enriched the ISM with carbon.[8]
Due to a lack of old population stars detected, JD1 is probably a young galaxy.[8]
We are able to see this galaxy because of the gravitational lensing caused by the MACS J1149.5+2223 Galaxy Cluster.
See also
References
- ↑ 1.0 1.1 1.2 Hashimoto, Takuya (May 2018). "The onset of star formation 250 million years after the Big Bang". Nature 557 (7705): 392–395. doi:10.1038/s41586-018-0117-z. PMID 29769675. Bibcode: 2018Natur.557..392H.
- ↑ Zheng, Wei (September 2012). "A magnified young galaxy from about 500 million years after the Big Bang". Nature 489 (7416): 406–408. doi:10.1038/nature11446. PMID 22996554. Bibcode: 2012Natur.489..406Z.
- ↑ 3.0 3.1 "Index for [PCB2012 3020"]. NASA/IPAC Extragalactic Database. http://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=189158504. Retrieved 19 May 2018.
- ↑ 4.0 4.1 "ALMA Finds Most-Distant Oxygen in the Universe" (Press release). ALMA Observatory. 15 May 2018. Archived from the original on 2 June 2019. Retrieved 6 September 2018.
- ↑ "[ZZI2017 663"]. SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%5BZZI2017%5D+663.
- ↑ Hashimoto, Takuya; Laporte, Nicolas; Mawatari, Ken; Ellis, Richard S.; Inoue, Akio K.; Zackrisson, Erik; Roberts-Borsani, Guido; Zheng, Wei et al. (May 2018). "The onset of star formation 250 million years after the Big Bang" (in en). Nature 557 (7705): 392–395. doi:10.1038/s41586-018-0117-z. ISSN 0028-0836. PMID 29769675. Bibcode: 2018Natur.557..392H. https://www.nature.com/articles/s41586-018-0117-z.
- ↑ "NASA Telescopes Spy Ultra-Distant Galaxy - NASA Science" (in en-US). https://science.nasa.gov/missions/hubble/nasa-telescopes-spy-ultra-distant-galaxy/.
- ↑ 8.0 8.1 Stiavelli, Massimo; Morishita, Takahiro; Chiaberge, Marco; Grillo, Claudio; Leethochawalit, Nicha; Rosati, Piero; Schuldt, Stefan; Trenti, Michele et al. (2023-10-13). "The puzzling properties of the MACS1149-JD1 galaxy at z=9.11". The Astrophysical Journal 957 (2): L18. doi:10.3847/2041-8213/ad0159. Bibcode: 2023ApJ...957L..18S.
This article incorporates text from this source, which is available under the CC BY 4.0 license.
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