Galaxy Cluster Abell 0272 (aka Zwicky 0152+33)


Galaxy Cluster Abell 0272


This is a 10 minute exposure with an ST-6 CCD camera thru Kopernik's 20-inch F/8.1 Ritchey Chretien Cassegrain telescope. The field of view is about 5x7 arc minutes.


Zwicky 0152+33 is one of three galaxy clusters discovered in 1968 by Fritz Zwicky to be made up mostly of compact elliptical galaxies. Zwicky estimated that there were 144 galaxies making up Abell 0272.

In 1972 Wallace Sargent of Hale Observatory made a detailed study of the dynamics of this cluster based on his red shift data for 16 of the brightest galaxies (all dimmer than 17th magnitude) that seem to make up a chain or central 'spine' of the cluster. He found that these galaxies are actually arranged in a non-rotating disk-like shape, seen edge-on and that at least the central 10 form a gravitationally bound system. He also found that all of these galaxies except #6 are very red and have a spectrum similar to older yellow & red stars. Galaxy #6 is much bluer and has emission features in its spectrum, consistent with recent star formation. Galaxy # 2M was identified as an infrared source by the Two Micron All Sky Survey (2 MASS).

Based on the red shift study, a distance estimate (using a Hubble Constant of 62 Km/sec per Mpc) for this cluster is 1.2 Billion light years. At that distance the picture above covers 1.8 by 2.6 million light years, or roughly the distance from the Milky Way to the Andromeda Galaxy.

Galaxy Cluster Abell 0272 ( aka Zwicky 0152+33)

Number On Image

Object Name

Equatorial J2000.0

Mag-
nitude

PGC Number

Velocity/Redshift

Distance from object #02 (arcmin)

   

RA

DEC

   

km/s

z

 

1

Zw 139 -01

01h55m16.6s

+33d53m20s

17.6

...

26,222

0.087467

0.7

2

Zw 139 -02

01h55m13.6s

+33d52m56s

17.5

007144

26,983

0.090005

0.0

3

Zw 139 -03

01h55m11.5s

+33d53m09s

17.3

...

27,261

0.090933

0.5

4

Zw 139-04

01h55m10.8s

+33d53m21s

17.1

...

26,505

0.088411

0.7

5

Zw 139 -05

01h55m10.6s

+33d53m48s

17.4

007142

26,518

0.088454

1.1

6

Zw 139-06

01h55m07.3s

+33d55m05s

17.5

...

26,523

0.088471

2.5

7

Zw 139 -07

01h55m06.2s

+33d55m15s

17.5

...

...

...

2.8

8

Zw 139 -08

01h55m06.3s

+33d56m01s

17.0

...

26,844

0.089542

3.4

10

Zw 139-10

01h55m03.8s

+33d55m54s

17.7

...

26,936

0.089849

3.6

2M

2MASXi J0155127+335238

01h55m12.7s

+33d52m38s

...

...

...

...

0.4

 

Zwicky 0152+33

01h55m07.0s

+33d53m41s

 

Gal. Cls.

...

...

1.6

 

Abell 0272

01h55m19.1s

+33d56m41s

 

Gal. Cls.

26,292

0.08770

3.9

 


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George Normandin, KAS

December 27th, 2000