MACS0647-JD explained
| MACS0647-JD |
| Epoch: | J2000 |
| Type: | Dwarf |
| H Radial V: | 3,183,796 km/s |
| Dist Ly: | 13.32NaN2 (light-travel time)
322NaN2 (comoving distance) |
| Stars: | 1 billion (1×109) |
| Group Cluster: | MACS J0647+7015 |
| Z: | [1] |
| Size V: | 0.00015 x 0.000062 |
| Constellation Name: | Camelopardalis |
| Size: | 600 ly (diameter) |
| Names: | CZC2013 MACS0647-JD1 |
MACS0647-JD is a galaxy with a redshift of about z = 10.7, equivalent to a light travel distance of 13.26 billion light-years (4 billion parsecs). If the distance estimate is correct, it formed about 427 million years after the Big Bang.[2] [3] [4] [5]
Details
JD refers to J-band Dropout – the galaxy was not detected in the so-called J-band (F125W), nor in 14 bluer Hubble filters. It only appeared in the two reddest filters (F140W and F160W).
It is less than 600 light-years wide, and contains roughly a billion stars.
The galaxy was discovered with the help of Cluster Lensing And Supernova survey with Hubble (CLASH), which uses massive galaxy clusters as cosmic telescopes to magnify distant galaxies behind them, an effect called gravitational lensing. Observations were recorded by the Wide Field Camera 3 on the Hubble Space Telescope,[4] with support from the Spitzer Space Telescope.[3]
The location of the galaxy is in the constellation Camelopardalis, which is also the location of the gravitational lensing cluster that helped discover this galaxy: MACSJ0647+7015 at z = 0.591.[6]
MACS0647-JD was announced in November 2012, but by the next month UDFj-39546284, which was previously thought to be z = 10.3, was said to be at z = 11.9,[7] although more recent analyses have suggested the latter is likely to be at a lower redshift.[8]
Infrared NIRCam imaging of MACS0647-JD by the James Webb Space Telescope (JWST) in September 2022 determined a photometric redshift of, in agreement with the previous Hubble estimate. Additional spectroscopic observations by JWST will be needed to accurately confirm the redshift of MACS0647-JD.[1]
See also
External links
Notes and References
- JWST reveals a possible z~11 galaxy merger in triply-lensed MACS0647 − JD. Tiger Yu-Yang. Hsiao. etal. 2210.14123. astro-ph.GA. October 2022.
- Web site: NASA Great Observatories Find Candidate for Most Distant Galaxy Yet Known . . November 15, 2012 . November 17, 2012.
- 2013ApJ...762...32C . CLASH: Three Strongly Lensed Images of a Candidate z ~ 11 Galaxy . The Astrophysical Journal . 762 . 1 . 32 . 2013 . 10.1088/0004-637x/762/1/32. 1211.3663 . Coe . Dan . Zitrin . Adi . Carrasco . Mauricio . Shu . Xinwen . Zheng . Wei . Postman . Marc . Bradley . Larry . Koekemoer . Anton . Bouwens . Rychard . Broadhurst . Tom . Monna . Anna . Host . Ole . Moustakas . Leonidas A. . Ford . Holland . Moustakas . John . Van Der Wel . Arjen . Donahue . Megan . Rodney . Steven A. . Benítez . Narciso . Jouvel . Stephanie . Seitz . Stella . Kelson . Daniel D. . Rosati . Piero . 119114237 .
- Web site: Hubble spots three magnified views of most distant known galaxy . . November 15, 2012 . November 17, 2012.
- Book: Hubble Spies ... ]. D. Coe. Astrophysical Journal. 2015-11-02.
- Web site: NASA Great Observatories Find Candidate for Most Distant Galaxy Yet Known . Space Telescope Science Institute . Fast Facts . November 15, 2012 . November 17, 2012.
- http://www.universetoday.com/98959/hubble-census-unveils-galaxies-shining-near-cosmic-dawn/#more-98959 Universe Today - Hubble Census Unveils Galaxies Shining Near Cosmic Dawn
- 2013ApJ...765L...2B . A Tentative Detection of an Emission Line at 1.6 mum for the z ~ 12 Candidate UDFj-39546284 . The Astrophysical Journal . 765 . 1 . L2 . 2013 . 10.1088/2041-8205/765/1/l2. 1301.0317 . Brammer . Gabriel B. . Van Dokkum . Pieter G. . Illingworth . Garth D. . Bouwens . Rychard J. . Labbé . Ivo . Franx . Marijn . Momcheva . Ivelina . Oesch . Pascal A. . Bouwens . Rychard . Broadhurst . Tom . Monna . Anna . Host . Ole . Moustakas . Leonidas A. . Ford . Holland . Moustakas . John . Arjen van der Wel . Donahue . Megan . Rodney . Steven A. . Benitez . Narciso . Jouvel . Stephanie . Seitz . Stella . Kelson . Daniel D. . Rosati . Piero . 119226564 .
