News Release Archive:

News Release 126 of 325

January 8, 2008 02:00 PM (EST)

News Release Number: STScI-2008-02

Hubble Finds that "Blue Blobs" in Space Are Orphaned Clusters of Stars

Technical facts about this news release:

About the Object
Object Name: Arp's Loop, A0952+69 Holmberg IX, UGC 5336
Object Description: Collection of Blue Stars Dwarf Irregular Galaxy
Position (J2000): R.A. 09h 57m 36.s08
Dec. 69° 16' 59."5
R.A. 09h 57m 40.s16
Dec. 69° 02' 55."4
Constellation: Ursa Major Ursa Major
Distance: 12 million light-years (3.6 Megaparsecs) 12 million light-years (3.6 Megaparsecs)
About the Data
Science Team: The science team comprises D. de Mello (GSFC/Catholic University of America, Washington/JHU), L. Smith (STScI/ESA/University College London), E. Sabbi (STScI), J. Gallagher (University of Wisconsin, Madison), M. Mountain (STScI), and D. Harbeck (University of Wisconsin, Madison).
Data Description: The Hubble image of Arp's Loop was created from HST data from proposal 10915: J. Dalcanton (University of Washington). The Hubble image of Holmberg IX was created from HST data from proposal 10605: E. Skillman (University of Minnesota, Twin Cities).
Instrument: ACS/WFC ACS/WFC
Exposure Date(s): September 22, 2006 March 23, 2006
Filters: F435W (B) and F814W (I) F555W (V) and F814W (I)
About the Image
Image Credit: NASA, ESA, and D. de Mello (Catholic University of America and GSFC) NASA, ESA, and the Hubble Heritage Team (STScI/AURA)
Release Date: January 8, 2008 January 8, 2008

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

F435W (B) blue
F435W (B) + F814W (I) green
F814W (I) red
F555W (V) cyan
F814W (I) orange


Orientation: Hubble View of Arp's Loop Dwarf Galaxy Holmberg IX