----- Submission 1 (Fri May 19 12:44:36 GMT 2006) -----
----- Attempting Submission 2 (Tue Jun 05 10:14:19 GMT 2007) -----
Phase II Proposal 10789 (wfpc2_dwarfs_07) successfully submitted.
----- Attempting Submission 3 (Tue Jun 05 10:31:11 GMT 2007) -----
----- Attempting Submission 4 (Tue Jun 05 20:51:23 GMT 2007) -----
Don't know why I keep getting this.
there are several errors, but I hope this gets through. I cannot diagnose them, and cannot find the X anywhere in my
document.
Assigned ID: 325
----- Submission 1 (Fri Jan 27 19:01:32 GMT 2006) -----
Phase I Proposal 325 (newdwarfs2) successfully submitted.
The Role of Environment in the Formation of Dwarf Galaxies
Clusters of galaxies contain an overdensity of dwarfs compared to the field. Within galaxy clusters there is also a correlation between the overdensity of dwarfs and local galaxy density, such that areas of lower galaxy density contain more dwarfs per giant. The origin of these 'extra' dwarfs is unknown, but a large fraction of them did not form through standard collapses early in the universe. Some dwarf ellipticals in clusters have metal rich and young (< 6 Gyr) stellar populations while others contain old metal poor populations, suggesting multiple formation mechanisms and time scales. We propose to test the idea that dwarfs descend from galaxies accreted into clusters during the past 8 Gyr by correlating ages and metallicities of dwarfs with their internal structures - spiral arms, bars, and disks. If dwarfs originate from more massive galaxies then these features should be common in metal rich and young dwarfs. On the other hand, if no correlation is found it would suggest that dwarfs form through in-situ collapses of gas in the intragalactic medium after the universe was reionized.
Our observing program consists of imaging in the
F814W band and F555W band for outer fields of the Perseus
cluster. Our program is fairly straightforward and consists of
1 orbit in each band per pointing. We split each orbit into three
different exposures to remove cosmic rays.
UNRESOLVED STELLAR POPULATIONS
12
false
0.0
false
false
false
false
false
false
SUPPORTED
CLUSTER OF GALAXIES
RICH CLUSTER
J2000
03 18 53.5000
+41 31 50.10
J2000
CLUSTER OF GALAXIES
RICH CLUSTER
J2000
03 19 4.2000
+41 35 20.60
J2000
CLUSTER OF GALAXIES
RICH CLUSTER
J2000
03 19 5.2000
+41 34 48.10
J2000
CLUSTER OF GALAXIES
RICH CLUSTER
J2000
03 19 13.0000
+41 34 51.80
J2000
CLUSTER OF GALAXIES
RICH CLUSTER
J2000
03 19 46.1000
+41 24 51.20
J2000
CLUSTER OF GALAXIES
RICH CLUSTER
J2000
03 19 33.5000
+41 24 39.40
J2000
CLUSTER OF GALAXIES
RICH CLUSTER
J2000
03 19 58.5000
+41 31 2.00
J2000
ACS/WFC
Imaging
No
No
F555W
ACS/WFC
Imaging
No
No
F814W
ACS/WFC
Imaging
No
No
F555W
ACS/WFC
Imaging
No
No
F814W
ACS/WFC
Imaging
No
No
F555W
ACS/WFC
Imaging
No
No
F814W
ACS/WFC
Imaging
No
No
F555W
ACS/WFC
Imaging
No
No
F814W
ACS/WFC
Imaging
No
No
F555W
ACS/WFC
Imaging
No
No
F814W
ACS/WFC
Imaging
No
No
F555W
ACS/WFC
Imaging
No
No
F814W
ACS/WFC
Imaging
No
No
F555W
ACS/WFC
Imaging
No
No
F814W
POS-TARG
DITHER
0.3535
LINE
false
false
2
45
WFPC2-LINE
1
false
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