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]
| 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] |
| Heliocentric 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 0.00075 |
| Other designations | |
| [PCB2012] 3020, [KOI2016] HFF4C-YJ1, [ZZI2017] 663[5] | |
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]
See also
editReferences
edit- ^ a b c Hashimoto, Takuya; et al. (May 2018). "The onset of star formation 250 million years after the Big Bang". Nature. 557 (7705): 392–395. arXiv:1805.05966. Bibcode:2018Natur.557..392H. doi:10.1038/s41586-018-0117-z. PMID 29769675. S2CID 256770802.
- ^ Zheng, Wei; et al. (September 2012). "A magnified young galaxy from about 500 million years after the Big Bang". Nature. 489 (7416): 406–408. arXiv:1204.2305. Bibcode:2012Natur.489..406Z. doi:10.1038/nature11446. PMID 22996554. S2CID 118335980.
- ^ a b "Index for [PCB2012] 3020". NASA/IPAC Extragalactic Database. Retrieved 19 May 2018.
- ^ a b Lira, Nicolás; et al. (15 May 2018). "ALMA Finds Most-Distant Oxygen in the Universe" (Press release). ALMA Observatory. Archived from the original on 2 June 2019. Retrieved 6 September 2018.
- ^ "[ZZI2017] 663". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 May 2018.
- ^ Hashimoto, Takuya; Laporte, Nicolas; Mawatari, Ken; Ellis, Richard S.; Inoue, Akio K.; Zackrisson, Erik; Roberts-Borsani, Guido; Zheng, Wei; Tamura, Yoichi; Bauer, Franz E.; Fletcher, Thomas; Harikane, Yuichi; Hatsukade, Bunyo; Hayatsu, Natsuki H.; Matsuda, Yuichi (May 2018). "The onset of star formation 250 million years after the Big Bang". Nature. 557 (7705): 392–395. arXiv:1805.05966. Bibcode:2018Natur.557..392H. doi:10.1038/s41586-018-0117-z. ISSN 0028-0836. PMID 29769675.
- ^ "NASA Telescopes Spy Ultra-Distant Galaxy - NASA Science". science.nasa.gov. Retrieved 2024-05-14.
- ^ a b Stiavelli, Massimo; Morishita, Takahiro; Chiaberge, Marco; Grillo, Claudio; Leethochawalit, Nicha; Rosati, Piero; Schuldt, Stefan; Trenti, Michele; Treu, Tommaso (2023-10-13). "The puzzling properties of the MACS1149-JD1 galaxy at z=9.11". The Astrophysical Journal. 957 (2): L18. arXiv:2308.14696. Bibcode:2023ApJ...957L..18S. doi:10.3847/2041-8213/ad0159.
This article incorporates text from this source, which is available under the CC BY 4.0 license.
External links
edit
Media related to MACS1149-JD1 at Wikimedia Commons- NASA Telescopes Spy Ultra-Distant Galaxy
