THE MORPHS

There is a UK Mirror of this site at Durham.

The MORPHS collaboration is a group of researchers using the Wide Field and Planetary Camera 2 of the refurbished Hubble Space Telescope to study the morphologies of galaxies in distant clusters. The collaboration consists of: Alan Dressler and Gus Oemler at OCIW, Warrick Couch at UNSW, Richard Ellis at Caltech, Bianca Poggianti at Padova, Amy Barger at the IfA, Harvey Butcher at FRNA, and Ray Sharples and Ian Smail at Durham University.

SAMPLE

The full Morphs sample consists of 11 clusters spanning the redshift range z=0.37-0.56. The clusters were all imaged with WFPC-2 in either F702W or F814W, as well as additional bluer passbands for some targets. Nine of the fields are centred close to the cluster cores, the remaining two fields (marked as #2) are of regions in the outskirts of the clusters. More details of the clusters in the sample and our observations are given in the table below and also Smail et al. (1997a).

Cluster

RA(J2000)

Dec(J2000)

PA

z

F450W

F555W

F702W

F814W

Scale

E(B-V)

mu

Morph

All

A370#2

02:40:01.1

-01:36:45

235.00

0.37

---

8.0

---

12.6

3.09

0.01

27.5

129

542

Cl1447+23

14:49:28.2

+26:07:57

125.35

0.37

---

---

4.2

---

3.09

0.02

27.5

210

792

Cl0024+16

00:26:35.6

+17:09:43

328.30

0.39

23.4

---

---

13.2

3.17

0.03

27.5

248

835

Cl0939+47

09:43:02.6

+46:58:57

47.32

0.41

---

---

21.0

---

3.26

0.00

27.3

207

975

Cl0939+47#2

09:43:02.5

+46:56:07

315.00

0.41

---

4.0

---

6.3

3.26

0.00

26.9

116

627

Cl0303+17

03:06:15.9

+17:19:17

50.13

0.42

---

---

12.6

---

3.29

0.12

27.9

161

891

3C295

14:11:19.5

+52:12:21

282.04

0.46

---

---

12.6

---

3.43

0.00

27.1

142

899

Cl0412-65

04:12:51.7

-65:50:17

174.00

0.51

---

12.6

---

14.7

3.59

0.00

27.5

155

865

Cl1601+42

16:03:10.6

+42:45:35

315.00

0.54

---

---

16.8

---

3.67

0.00

28.3

145

928

Cl0016+16

00:18:33.6

+16:25:46

250.00

0.55

---

12.6

---

16.8

3.67

0.03

26.7

211

837

Cl0054-27

00:56:54.6

-27:40:31

121.00

0.56

---

12.6

---

16.8

3.72

0.00

27.4

133

767

CATALOGS

This table gives the links to the various catalogs and images of the clusters in our sample. All files are provided as uuencoded gzipped FITS, ASCII or Postscript. Full details of our analysis and the contents of the catalogs are given in Smail et al. (1997a). All the information provided here will also appear as part of the AAS CD-ROM series. `Full Catalog' contains the photometry catalog of all objects detected within our fields using the SExtractor image analysis package, including colors where available. `Morphologies' gives the catalog of the morphologically-typed subsamples from each cluster, the positions of these objects are shown in `Finder'. Finally, we provide links to the reduced WFPC-2 images of all the clusters. Further information about the format of the Morphology and Full catalogs can be found by following those links or in this Postscript document. TAR files containing the complete ASCII tables of the entire Morphological and Full samples are available here.

FITS CATALOGS

A370#2

Full Catalog

Morphologies

Finder

F555W image

F814W image

Cl1447+23

Full Catalog

Morphologies

Finder

F702W image

Cl0024+16

Full Catalog

Morphologies

Finder

F450W image

F814W image

Cl0939+47

Full Catalog

Morphologies

Finder

F702W image

Cl0939+47#2

Full Catalog

Morphologies

Finder

F555W image

F814W image

Cl0303+17

Full Catalog

Morphologies

Finder

F702W image

3C295

Full Catalog

Morphologies

Finder

F702W image

Cl0412-65

Full Catalog

Morphologies

Finder

F555W image

F814W image

Cl1601+42

Full Catalog

Morphologies

Finder

F702W image

Cl0016+16

Full Catalog

Morphologies

Finder

F555W image

F814W image

Cl0054-27

Full Catalog

Morphologies

Finder

F555W image

F814W image

ASCII CATALOGS

A370#2

Full Catalog

Morphologies

Finder

F555W image

F814W image

Cl1447+23

Full Catalog

Morphologies

Finder

F702W image

Cl0024+16

Full Catalog

Morphologies

Finder

F450W image

F814W image

Cl0939+47

Full Catalog

Morphologies

Finder

F702W image

Cl0939+47#2

Full Catalog

Morphologies

Finder

F555W image

F814W image

Cl0303+17

Full Catalog

Morphologies

Finder

F702W image

3C295

Full Catalog

Morphologies

Finder

F702W image

Cl0412-65

Full Catalog

Morphologies

Finder

F555W image

F814W image

Cl1601+42

Full Catalog

Morphologies

Finder

F702W image

Cl0016+16

Full Catalog

Morphologies

Finder

F555W image

F814W image

Cl0054-27

Full Catalog

Morphologies

Finder

F555W image

F814W image

All Clusters

Full Catalog

Morphologies

 

 

 

Note: Marcel Bergmann has queried the accuracy of the photometry in Cl0024+16 - the cause of this is being looked into (6/10/98).

There are also files describing the format of the various tables. For the Full Catalogs of all clusters imaged in F702W, all clusters imaged in F814W except Cl0024+16 and for Cl0024+16. For the Morphological catalogs there are format files for all clusters imaged in F702W and F814W. Note - the photometric zero points used in these catalogs are from Table 9 of Holtzman et al (1995) and we use the Zobs values for F555W/F814W and Zsyn for F450W/F702W.

SPECTRAL CATALOG

The spectral catalog for galaxies within the 10 clusters of the MORPHS sample can be found on this page. The data presented here include positions, photometry, redshifts, spectral line strengths and classifications for 657 galaxies in the fields of the 10 clusters. The catalog comprises 424 cluster members across the 10 clusters and 233 field galaxies, with detailed morphological information from our WFPC2 images for 204 of the cluster galaxies and 71 in the field. Full details of our analysis and the contents of the catalogs are given in Dressler et al. (1999).

PUBLICATIONS

The publications based upon these observations include:

``The Star Formation Histories of Galaxies in Distant Clusters'', Poggianti, B.M., Smail, I., Dressler, A., Couch, W.J., Barger, A.J., Butcher, H., Ellis, R.S., Oemler, A., 1999, ApJ, 518, 576. Postscript version

``A Catalog of Spectral Observations of 10 Distant Rich Clusters of Galaxies'', Dressler, A., Smail, I., Poggianti, B.M., Butcher, H., Couch, W.J., Ellis, R.S., Oemler, A., 1999, ApJS, 122, 51. Postscript version

``Evolution in the Elliptical Populations of Distant Clusters'', Barger, A., Aragon-Salamanca, A., Smail, I., Ellis, R.S., Couch, W.J., Dressler, A., Oemler, A., Butcher, H. & Sharples, R.M., 1997, ApJ, 501, 522. Postscript version

``Evolution Since z = 0.5 of the Morphology-Density Relation for Clusters of Galaxies'', Dressler, A., Oemler, A. Jr, Couch, W.J., Smail, I., Ellis, R.S., Barger, A., Butcher, H., Poggianti, B.M. & Sharples, R.M., 1998, ApJ, 490, 577. Postscript version

``The Homogeneity of Spheroidal Populations in Distant Clusters'', Ellis, R.S., Smail, I., Dressler, A., Couch, W.J., Oemler, A., Butcher, H. & Sharples, R.M., 1997, ApJ, 483, 582. Postscript version

``A Catalog of Morphological Types in 10 Distant Rich Clusters of Galaxies'', Smail, I., Dressler, A., Couch, W.J., Ellis, R.S., Oemler, A., Butcher, H. & Sharples, R.M., 1997a, ApJS, 110, 213. Postscript version

``A Comparison of Direct and Indirect Mass Estimates for Distant Clusters of Galaxies'', Smail, I., Ellis, R.S., Dressler, A., Couch, W.J., Oemler, A., Butcher, H., Sharples, R.M., 1997b, ApJ, 479. 70-81. Postscript version

SOFTWARE

Software to convert these FITS tables to ASCII is available within IRAF/STSDAS (strfits and tdump) or here.

COLOR IMAGES

``True'' color images of three of the more distant clusters imaged as part of this project are available for Cl0016+16, Cl0054-27 and Cl0412-65. These are large GIF images and are probably best viewed by downloading and then manipulating the image with XV or a similar utility. There are also two mosaics of spectroscopically confirmed members of these clusters at a high stretch and a lower one. Additional images may be available here

ACKNOWLEDGEMENTS

We wish to thank Ray Lucas at STScI for his enthusiastic help which enabled the efficient gathering of these HST observations. We also thank Dr E. Turner for kindly providing his WFPC-2 imaging of Cl0024+16 for inclusion in this dataset. The information presented here is based on observations obtained with the NASA/ESA Hubble Space Telescope which is operated by STSCI for the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555.

Last Modified: January 18th, 1999. [Netscape 2.0]

Ian Smail, Ian.Smail AT durham.ac.uk
Department of Physics, University of Durham, South Road, Durham DH1 3LE Tel: +44-191-374-7463 / Dept: +44-191-374-2165 / FAX: +44-191-374-3749