Hubble image archive
Hubble and Spitzer Uncover Smallest Galaxy Building Blocks
In this image of the Hubble Ultra Deep Field, several objects are identified as the faintest, most compact galaxies ever observed in the distant universe. They are so far away that we see them as they looked less than one billion years after the Big Bang. Blazing with the brillia...
- Date
- Jan 1, 2007
- Mission
- Hubble Space Telescope
- Archive ID
- hubblesite-images-2007-31-2168-image
In this image of the Hubble Ultra Deep Field, several objects are identified as the faintest, most compact galaxies ever observed in the distant universe. They are so far away that we see them as they looked less than one billion years after the Big Bang. Blazing with the brilliance of millions of stars, each of the newly discovered galaxies is a hundred to a thousand times smaller than our Milky Way Galaxy.
The bottom row of pictures shows several of these clumps (distance expressed in redshift value). Three of the galaxies appear to be slightly disrupted. Rather than being shaped like rounded blobs, they appear stretched into tadpole-like shapes. This is a sign that they may be interacting and merging with neighboring galaxies to form larger structures.
The detection required joint observations between Hubble and NASA's Spitzer Space Telescope. Blue light seen by Hubble shows the presence of young stars. The absence of infrared light from Spitzer observations conclusively shows that these are truly young galaxies without an earlier generation of stars.
Credits
NASA, ESA, and N. Pirzkal (STScI/ESA)Image Details
| About The Object | |
|---|---|
| Object Name | Galaxies in the Hubble Ultra Deep Field, HUDF, Hubble Ultra Deep Field |
| Object Description | Distant galaxies, Deep field survey |
| R.A. Position | 03h 31m 59.99s |
| Dec. Position | -27° 48' 0.0" |
| Constellation | Fornax |
| Dimensions | The full HUDF image is 3 arcminutes square. |
| About The Data | |
| Data Description | GRAPES HST Data The science data were selected based on findings from The Grism-ACS Program for Extragalactic Science (GRAPES), HST proposal : S. Malhotra et. al. The science team includes: N. Pirzkal (STSCI/ESA) S. Malhotra and J. Rhoads (Arizona State University), and C. Xu (Shanghai Institute of Technical Physics). HUDF HST Data This image of the HUDF was created from HST data from the following proposal: : S. Beckwith, S. Malhotra, M. Giavalisco, N. Panagia, J. Rhoads, M. Stiavelli, R. Somerville, S. Casertano, B. Margon, C. Blades, J. Caldwell, and M. Clampin (STScI), M. Corbin (STScI/CSC), M. Dickinson, H. Ferguson, and A. Fruchter (STScI), R. Hook (STScI/ECF), S. Jogee, A. Koekemoer, R. Lucas, M. Sosey, and L. Bergeron (STScI). NICMOS HUDF Data The NICMOS HUDF data were from proposal : R. Thompson (University of Arizona), G. Illingworth and R. Bouwens (university of California, Santa Cruz), M. Dickinson (STScI), D. Eisenstein and X. Fan (University of Arizona), M. Franx (University of Leiden), M. Rieke (University of Arizona), A. Riess (STScI), and P. van Dokkum (Yale University). The Spitzer science team includes: H. Yan (Caltech), M Dickinson (NOAO), D. Stern and P. Eisenhardt (Jet Propulsion Lab), R.-R. Chary (Caltech), M. Giavalisco (STScI), H. Ferguson and S. Casertano (STScI), C. Conselice (Caltech), C. Papovich (Steward Observatory), W. Reach (Caltech), N. Grogin (STScI), L. Moustakas (Jet Propulsion Lab), and M. Ouchi (STScI). |
| Instrument | HST>ACS/WFC, HST>ACS/NICMOS, and SST>IRAC |
| Exposure Dates | September 24, 2003 - January 16, 2004, Exposure Time: 11.3 days (ACS/WFC), September 3, 2003 - November 27, 2003, Exposure Time: 11.3 days (ACS/NICMOS), and February 2004, Exposure Time: 5 days (IRAC) |
| Filters | ACS/WFC: F435W (B), F606W (V), F775W (i), F850LP (z) ACS/NICMOS: F110W (J110) and F160W (H160) IRAC: 3.6, 4.5, 5.8, and 8.0 microns |
| About The Image | |
| Color Info | Blue: F435W (B) Green: F606W (V) + F775W (i) Red: F850LP (z) |
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Image and source material are credited to the official mission archive linked below.
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