MACS0647-JD

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MACS0647-JD
Camelopardalis
Right ascension06h 47m 55.73s
Declination+70° 14′ 35.8″
Redshift10.6±0.3[1]
Heliocentric radial velocity3,183,796 km/s
Distance13.3 billion light-years (4.08 gigaparsecs) (light-travel time)
32 billion light-years (9.81 gigaparsecs) (comoving distance)
MACS J0647+7015
Characteristics
TypeDwarf
Number of stars1 billion (1×109)
Size600 ly (diameter)
Apparent size (V)0.00015 x 0.000062
Other designations
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]

MACS0647-JD is very young and only a tiny fraction of the size of the Milky Way.[6]

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

gravitational lensing. Observations were recorded by the Wide Field Camera 3 on the Hubble Space Telescope,[4] with support from Spitzer Space Telescope.[3]

The location of the galaxy is in the constellation

MACSJ0647+7015 at z = 0.591.[7]

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,[8] although more recent analyses have suggested the latter is likely to be at a lower redshift.[9]

Infrared NIRCam imaging of MACS0647-JD by the James Webb Space Telescope (JWST) in September 2022 determined a photometric redshift of 10.6±0.3, in agreement with the previous Hubble estimate. Additional spectroscopic observations by JWST will be needed to accurately confirm the redshift of MACS0647-JD.[1]

In this James Webb Space Telescope image of galaxy cluster MACS0647, the massive gravity of the cluster acts as a cosmic lens to bend and magnify light. [10]

See also

References

  1. ^
    arXiv:2210.14123 [astro-ph.GA
    ].
  2. ^ "NASA Great Observatories Find Candidate for Most Distant Galaxy Yet Known". Space Telescope Science Institute. November 15, 2012. Retrieved November 17, 2012.
  3. ^
    S2CID 119114237
    .
  4. ^ a b "Hubble spots three magnified views of most distant known galaxy". Hubble Space Telescope. November 15, 2012. Retrieved November 17, 2012.
  5. Astrophysical Journal
    . Retrieved 2015-11-02.
  6. ^ "Hubble helps find candidate for most distant object in the Universe yet observed". ESA/Hubble Press Release. Retrieved 15 February 2013.
  7. ^ "NASA Great Observatories Find Candidate for Most Distant Galaxy Yet Known". Space Telescope Science Institute. Fast Facts. November 15, 2012. Retrieved November 17, 2012.
  8. ^ Universe Today - Hubble Census Unveils Galaxies Shining Near Cosmic Dawn
  9. S2CID 119226564
    .
  10. ^ "Webb Surprises Astronomers with Never-Before-Seen Details of the Early Universe". October 19, 2023.

External links

Preceded by Most distant astronomical object known
2012 		Succeeded by
Preceded by Most distant galaxy known
2012 		Succeeded by
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