DOI QR코드

DOI QR Code

THE MASS PROFILE OF ABELL 1689 FROM A LENSING ANALYSIS OF DEEP WIDE FIELD SUBARU IMAGES

  • UMETSU KEIICHI (Institute of Astronomy and Astrophysics) ;
  • BROADHURST TOM (Astronomical Institute, Tohoku University) ;
  • TAKADA MASAHIRO (School of Physics and Astronomy, Tel Aviv University) ;
  • KONG Xu (National Astronomical Observatory of Japan)
  • Published : 2005.06.01

Abstract

We used Subaru observations of A1689 (z = 0.183) to derive an accurate, model-independent mass profile for the entire cluster, r$\le$2Mpc/h, by combining magnification bias and distortion measurements. The projected mass profile steepens quickly with increasing radius, falling away to zero at r${\~}$1.0Mpc/h, well short of the anticipated virial radius. Our profile accurately matches onto the inner profile, r $\le$200kpc/ h, derived from deep HST / ACS images. The combined ACS and Subaru information is well fitted by an NFW profile with virial mass, $(1.93 \pm 0.20) {\times}10^{15} M_{\bigodot}$, and surprisingly high concentration, $C_{vir} = 13.7^{+1.4}_{-1.1}$, significantly larger than theoretically expected ($C_{vir} {\le}4$), corresponding to a relatively steep overall profile. These results are based on a reliable sample of background galaxies selected to be redder than the cluster E/SO sequence. By including the faint blue galaxy population a much smaller distortion signal is found, demonstrating that blue cluster members significantly dilute the true signal for r $\le$ 400kpc/ h. This contamination is likely to affect most weak lensing results to date.

Keywords

cosmology: observations;gravitational lensing;galaxy clusters: individual (Abell 1689)

References

  1. Bardeau, S., Kneib, J.-P., Czoske, O., Soucail, G., Smail, I., Ebeling, R., 2004, astro-ph/0407255
  2. Bartelmann, M., 1996, A&A, 313, 697
  3. Bertin, E., & Arnouts, S., 1998, A&AS, 117, 393 https://doi.org/10.1051/aas:1996164
  4. Broadhurst, T. J., et al., 2005, ApJ, 621, 53 (B05a) https://doi.org/10.1086/428928
  5. Broadhurst, T. J., et al., 2005, ApJ, 619, 143L (B05b) https://doi.org/10.1086/428122
  6. Bullock, J. S., et al., 2001, MNRAS, 321, 559 https://doi.org/10.1046/j.1365-8711.2001.04068.x
  7. Erben, T., Van Waerbeke, L., Bertin, E., Mellier, Y., & Schneider, P., 2001, A&A, 366, 717 https://doi.org/10.1051/0004-6361:20010013
  8. Fahlman, G., Kaiser, N., Squires, G., & Woods, D., 1994, ApJ, 437, 56 https://doi.org/10.1086/174974
  9. Kaiser, N., Squires, G., & Broadhurst, T., 1995, ApJ, 449, 460 https://doi.org/10.1086/176071
  10. Miyazaki, S., et al., 2002, PASJ, 54, 833 https://doi.org/10.1093/pasj/54.6.833
  11. Moore, B., Governato, F., Quinn, T., Stadel, J., & Lake G., 1998, ApJ, 499, L5 https://doi.org/10.1086/311333
  12. Navarro, J. F., Frenk, C. S., & White, S. D. M., 1997, ApJ, 490, 493 https://doi.org/10.1086/304888
  13. Schneider, P., King, L., & Erben, T., 2000, A&A, 353, 41
  14. Yagi, M., Kashikawa, N., Sekiguchi, M., et al., 2002, AJ, 123, 66 https://doi.org/10.1086/324731
  15. Clowe, D., & Schneider, P., 2001, A&A, 379, 384 https://doi.org/10.1051/0004-6361:20011310

Cited by

  1. CROSS-CORRELATION WEAK LENSING OF SDSS GALAXY CLUSTERS. I. MEASUREMENTS vol.703, pp.2, 2009, https://doi.org/10.1088/0004-637X/703/2/2217
  2. CROSS-CORRELATION WEAK LENSING OF SDSS GALAXY CLUSTERS. III. MASS-TO-LIGHT RATIOS vol.703, pp.2, 2009, https://doi.org/10.1088/0004-637X/703/2/2232
  3. Gravitational Shear, Flexion, and Strong Lensing in Abell 1689 vol.666, pp.1, 2007, https://doi.org/10.1086/520109