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News Release Archive:

News Release 478 of 959

January 1, 2004 12:01 AM (EST)

News Release Number: STScI-2004-01

Images from Hubble's ACS Tell a Tale of Two Record-Breaking Galaxy Clusters

Technical facts about this news release:

About the Object
Massive Galaxy Cluster RDCS 1252
Object Name: RDCS 1252.9-2927
Object Description: Galaxy Cluster
Position (J2000): R.A. 12h 52m 54s
Dec. -29° 27' 17"
Constellation: Hydra
Distance: 9 billion light-years (2.6 billion parsecs)
About the Data
Data Description: The field was imaged by Hubble during proposal 9290: H. Ford (JHU), M. Postman (STScI), M. Franx (University of Leiden), J. Blakeslee (JHU) and P. Rosati (ESO). The science team presenting the science results on this object includes J. Blakeslee (JHU), M. Franx (Leiden Observatory), M. Postman (JHU/STScI), P. Rosati (ESO), B. P. Holden (UCO/Lick), G. D. Illingworth (UCO/Lick), H. C. Ford (JHU), N. J. G. Cross (JHU), C. Gronwall (JHU), N. Benítez (JHU), R. J. Bouwens (JHU), T. J. Broadhurst (Hebrew University), M. Clampin (STScI), R. Demarco (ESO), D. A. Golimowski (JHU), G. F. Hartig (STScI), L. Infante (Pontificia Universidad Catolica de Chile), A. R. Martel (JHU), G. K. Miley (Leiden Observatory), F. Menanteau (JHU), G. R. Meurer (JHU), M. Sirianni (JHU) and R. L. White (JHU/STScI).
Instrument: ACS/WFC
Exposure Date(s): May - June, 2002
Exposure Time: 21 hours
Filters: F775W (i), F850LP (z)
About the Image
Image Credit: NASA, ESA, J. Blakeslee (JHU), M. Postman (STScI), and P. Rosati (ESO)
Release Date: January 1, 2004

 

About the Object
Embryonic Galaxy Cluster TN J1338
Object Name: TN J1338-1942
Object Description: Galaxy Proto-Cluster
Position (J2000): R.A. 13h 28m 26s
Dec. -19° 42' 30"
Constellation: Virgo
Distance: Approximately 12 billion light-years (4 billion parsecs)
About the Data
Data Description: The field was imaged by Hubble during proposal 9291: H. Ford (JHU), G. Miley (Leiden Observatory), W. Sparks (STScI), Z. Tsvetanov and H. Tran (JHU). The science team presenting this paper includes G. K. Miley (Leiden Observatory), R. A. Overzier (Leiden Observatory), Z. I. Tsvetanov (JHU), R. J. Bouwens (UCO/Lick), N. Benítez (JHU), J. Blakeslee (JHU), H. C. Ford (JHU), G. D. Illingworth (UCO/Lick), M. Postman (STScI), P. Rosati (ESO), M. Clampin (STScI), G. F. Hartig (STScI), A. W. Zirm (Leiden Observatory), H. J. A. Röttgering (Leiden Observatory), B. P. Venemans (Leiden Observatory), D. R. Ardila (JHU), F. Bartko (Bartko Sci. & Tech), T. J. Broadhurst (Hebrew University), R. A. Brown (JHU), C. J. Burrows (JHU), E. S. Cheng (NASA-GSFC), N. J. G. Cross (JHU), C. De Breuck (ESO), P. D. Feldman (JHU), M. Franx (Leiden Observatory), D. A. Golimowski (JHU), C. Gronwall (JHU), L. Infante (Pontificia Universidad Catolica de Chile), A. R. Martel (JHU), F. Menanteau (JHU), G. R. Meurer (JHU), M. Sirianni (JHU), R. A. Kimble (NASA-GSFC), J. E. Krist (STScI), W. B. Sparks (STScI), H. D. Tran (JHU), R. L. White (STScI), and W. Zheng (JHU).
Instrument: ACS/WFC
Exposure Date(s): July 9 - 12, 2002
Exposure Time: 8.5 hours
Filters: F475W(B), F625W (r), F775W (i)
About the Image
Image Credit: NASA, ESA, G. Miley and R. Overzier (Leiden Observatory)
Release Date: January 1, 2004