UDFj-39546284

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UDFj-39546284

Hubble Space Telescope image of UDFj-39546284 (seen as a reddish spot in the centre of the image)
Observation data
Constellation Fornax
Right ascension 03h 32m 39.54s[1]
Declination −27° 46′ 28.4″[1]
Redshift 11.9[2][1]
Distance ~13.42 billion light-years (light travel distance)[2][3]
~32.7(?) billion light-years
(present comoving distance)[4]
Apparent magnitude (V) V fainter than 30.1[1]
H160 = 28.92 ± 0.18[1]
J125 - H160 > 2[1]
See also: Galaxy, List of galaxies

Coordinates: 03h 32m 39.54s, −27° 46′ 28.4″ UDFj-39546284 is the designation given to a stellar structure reported January 27, 2011,[5] as light from the oldest object detected through infrared[6] observation within the Hubble Space Telescope. The object was identified by G. Illingworth (University of California), R. Bouwens (University of California and Leiden University) and the HUDF09 Team during 2009 and 2010 and is in the Fornax constellation.[7][8] It was confirmed by November 2012 to be at Z~10 using Hubble and Spitzer telescope data, including Hubble Extreme Deep Field (XDF).[9] It was reported in December 2012 to be at redshift z = 11.9[2] using Hubble and Spitzer telescope data, including Hubble Ultra-Deep Field (HUDF).[2][9]

The actual stellar source of the light detected no longer exists.[10][11] The image is likely to correspond to a compact mini-galaxy[12] of blue stars that existed as we see it 13.42 billion years ago, around "380 million years"[2] after the Big Bang (estimated at 13.8 billion years ago).[13]

At the time of the announcement, it was the oldest galaxy found and exceeded the previous distance record holder by roughly 150 million light years.[14] With the revision of the distance, it again became the oldest galaxy found, as of December 12, 2012.[2] It could remain so until the anticipated launch of the James Webb Space Telescope sometime this decade.

The galaxy has a z (redshift) of 11.9.[2] Unlike UDFy-38135539, UDFj-39546284 has not been spectroscopically confirmed.[15] It was confirmed to be at high redshift in 2012.[9]

A stellar organization first formed during a time thought temporally near to the end period of the Dark Ages,[16] the galaxy is remarkable mainly because it holds significantly expanded information of the early period after the Big Bang.

Gallery

  • UDFj-39546284

  • UDFj-39546284 appears as a faint red blob

  • Location of the Hubble Ultra-Deep Field on the sky

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 R.J. Bouwens, G.D. Illingworth, I. Labbe, P.A. Oesch, M. Carollo, M. Trenti, P.G. van Dokkum, M. Franx, M. Stiavelli, V. Gonzalez, D. Magee (2011). "A candidate redshift z ~ 10 galaxy and rapid changes in that population at an age of 500 Myr". Nature 469 (7331). pp. 504–507. arXiv:0912.4263. doi:10.1038/nature09717. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Wall, Mike (December 12, 2012). "Ancient Galaxy May Be Most Distant Ever Seen". Space.com. Retrieved December 12, 2012. 
  3. ↑ Rychard Bouwens, Garth Illiingworth & Dan Magee. "Galaxies at redshift 10". University of California Santa Cruz. Retrieved 2011-01-27. 
  4. ↑ Edward L. (Ned) Wright. "Cosmology Calculator I". Astronomy @ UCLA. Retrieved 2011-01-27. 
  5. ↑ C Petit writing for Knight Science Journalism at MIT - tracker Retrieved 2012-08-10
  6. ↑ A Mann writing for a Nature magazine (online) article Retrieved 2012-08-10 - this article references - Bouwens, R. J. et al. Nature 469, 504-507 (2011). 2.Yan, H.-J. et al. Res. Astron. Astrophys. 10, 867-904 (2010). 3.Kistler, M. D., Yüksel, H., Beacom, J. F., Hopkins, A. M. & Wyithe, J. S. B. Astrophys. J. 705, L104-L108 (2009)
  7. ↑ Staff (January 28, 2011). "Most Distant Galaxy Candidate Ever Seen in Universe". NASA. Retrieved December 13, 2012. 
  8. ↑ Staff. "Picture Album: Gray-scale Image of Object UDFj-39546284 from HUDF WFC3/IR". Space Telescope Science Institute. Retrieved December 13, 2012. 
  9. ↑ 9.0 9.1 9.2 R. J. Bouwens, et all - Confirmation of the z~10 Candidate UDFj-39546284 using deeper WFC3/IR+ACS+IRAC Observations over the HUDF09/XDF (2012)
  10. ↑ article of Wednesday January the 26th 2011 written by J Kluger, reporting for Time magazine(online) Retrieved 2012-08-10 (article originally sourced by C Petit)
  11. ↑ C Petit - review of - Science News written by Ron Cowen
  12. ↑ "mini-galaxy" - J Kluger & NASA
  13. ↑ Planck collaboration (2013). "Planck 2013 results. XVI. Cosmological parameters". Submitted to Astronomy & Astrophysics. arXiv:1303.5076. Bibcode:2013arXiv1303.5076P. 
  14. ↑ Dr Emily Baldwin. "Hubble pushes to the limit". www.astronomynow.com. 
  15. ↑ "Hubble finds a new contender for galaxy distance record". Space Telescope (heic1103 - Science Release). 26 January 2011. Retrieved 2011-01-27. 
  16. ↑ mit.edu/tracker 2012-08-10

External links

Wikimedia Commons has media related to UDFj-39546284.
Preceded by
UDFy-38135539		 Most distant astronomical object
2011 — 2012
z=10.3 		Succeeded by
MACS0647-JD
Preceded by
MACS0647-JD		 Most distant astronomical object
2012 — present
z=11.9 		Succeeded by
incumbent
Preceded by
UDFy-38135539		 Most distant galaxy
2011 — 2012
z=10.3 		Succeeded by
MACS0647-JD
Preceded by
MACS0647-JD		 Most distant galaxy
2012 — present
z=11.9 		Succeeded by
incumbent
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