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News Release Archive:

News Release 318 of 954

May 2, 2007 09:00 AM (EDT)

News Release Number: STScI-2007-18

Hubble Finds Multiple Stellar 'Baby Booms' in a Globular Cluster

Technical facts about this news release:

About the Object
Object Name: NGC 2808
Object Description: Globular Cluster
Position (J2000): R.A. 09h 12m 2s.57
Dec. -64° 51' 46".2
Constellation: Carina
Distance: Approximately 30,000 light-years (9,000 parsecs)
Dimensions: This image is roughly 3.2 arcminutes (24 light-years or 8 parsecs) wide.
About the Data
Note: Data for the release image of the center of the cluster were taken from the HST proposal 10775: A. Sarajedini (University of Florida), N. Reid (Space Telescope Science Institute), S. Majewski (University of Virginia), B. Chaboyer (Dartmouth College), A. Aparicio (Astrophysical Institute of the Canaries), G. Piotto (University of Padua [Padova]), I. King (University of Washington, Seattle), J. Anderson (Rice University), R. Rosenberg (Astrophysical Institute of the Canaries), M. Siegel (Space Telescope Science Institute), and L. Bedin (ESA, European Organization for Astronomical Research in the Southern Hemisphere, and STScI).
Data Description for Science:

The ACS data were from the HST proposal 9899: G. Piotto (University of Padua [Padova]), I. King (University of Washington, Seattle), J. Anderson (Rice University), L. Bedin (ESA, European Organization for Astronomical Research in the Southern Hemisphere, and STScI), A. Renzini (Astronomical Observatory of Padua [Padova]), M. Zoccali (European Southern Observatory - Germany), Y. Momany (University of Padua [Padova]), A. Recio-Blanco (INAF/Astronomical Observatory of Rome), and F. De Angeli (University of Cambridge);

and proposal 10922: G. Piotto (University of Padua [Padova]), L. Bedin (ESA, European Organization for Astronomical Research in the Southern Hemisphere, and STScI), J. Anderson (Rice University), I. King (University of Washington, Seattle), S. Cassisi (INAF/Astronomical Observatory of Collurania, Teramo, Italy), and S. Villanova, Y. Momany, and A. Milone (University of Padua [Padova]).

The science team includes G. Piotto (University of Padua [Padova]), L. Bedin (ESA, European Organization for Astronomical Research in the Southern Hemisphere, and STScI), J. Anderson (Rice University), I. King (University of Washington, Seattle), S. Cassisi and A. Pietrinferni (INAF/Astronomical Observatory of Collurania, Teramo, Italy), S. Villanova and A. Milone (University of Padua [Padova]), and A. Renzini (Astronomical Observatory of Padua [Padova]).

Instrument: ACS/WFC
Filters: F475W (g) and F814W (I)
Exposure Dates: May 2005, August/November 2006
Exposure Time: 1.6 hours
About the Image
Image Credit: NASA, ESA, A. Sarajedini (University of Florida) and G. Piotto (University of Padua [Padova])
Release Date: May 2, 2007
Color

This image is a composite of many separate exposures made by the ACS instrument on the Hubble Space Telescope. Two filters were used to sample light from broad wavelengths. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are:

F475W (g) blue
F475W (g) and F814W (I) green
F814W (I) red

 

Orientation/Scale: Globular Cluster with Multiple Stellar Populations