AAS Meeting #194 - Chicago, Illinois, May/June 1999
Session 19. Galaxy Clusters and Large Scale Structure
Oral, Monday, May 31, 1999, 10:00-11:30am, International Ballroom North

[Previous] | [Session 19] | [Next]

[19.01] The SHARC Survey: Alive and Kicking

R.C. Nichol, A.K. Romer (Carnegie Mellon University), B.P. Holden (University of Chicago), M.P. Ulmer, C. Adami (Northwestern University), A.R. Merrelli (Carnegie Mellon University), R.G. Kron (University of Chicago), D.J. Burke, C.A. Collins (Liverpool John Moores University)

The SHARC survey is now complete in its optical follow-up of over 200 extended X-ray sources serendipitously detected in over 500 ROSAT PSPC pointings. In total, it has detected 70 clusters span a redshift range of 0.06\star} in the X-ray Cluster Luminosity Function (XCLF).

We have used the SHARC to investigate evolution in the XCLF. We find no evidence for evolution below 5\times1044,{\rm erg/s} and out to z~q0.7. Above this luminosity however, we see a deficit of clusters compared to the local XCLFs. Such a deficit of bright, massive, clusters can be used to place strong constraints on the value of \Omegam.

In this talk, I will review our work on the XCLF (as summarised above) as well as present the discovery of 3 new ``fossil groups'' (Ponman et al. 1994). I will also review our SHARC-XMM guaranteed time project.

If the author provided an email address or URL for general inquiries, it is a s follows:


[Previous] | [Session 19] | [Next]