publication . Other literature type . Preprint . Article . 2001

Stars of the Draco Dwarf Spheroidal Galaxy Beyond Its Measured Tidal Boundary

Slawomir Piatek; Carlton Pryor; Taft E. Armandroff; Edward W. Olszewski;
  • Published: 01 Feb 2001
  • Publisher: IOP Publishing
Abstract
We report R- and V-band photometry derived from CCD imaging for objects in nine fields in and around the Draco dwarf spheroidal galaxy. The most distant fields are about 1.3 degrees from the center. We use these data to search for Draco stars outside of its measured tidal boundary. The search involves three methods: 1) Plotting color-magnitude diagrams for individual fields, for sections of fields, and for combined fields and sections. A color-magnitude diagram can reveal a population of Draco stars by the presence of the expected principal sequences. 2) Measuring field-to-field fluctuations and 3) measuring intra-field fluctuations in the surface density of obj...
Subjects
arXiv: Astrophysics::Galaxy AstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics
free text keywords: Astrophysics, Space and Planetary Science, Astronomy and Astrophysics, Physics, Semi-major axis, Draco (constellation), Dwarf spheroidal galaxy, Astronomy, Stars, Population, education.field_of_study, education, Local Group, Photometry (optics), Diagram

Armandroff, T., Massey, P., Silva, D., & Sarajedini, A. 1993, NOAO Newsletter, 36, 29 Baade, W., & Swope, H. H. 1961, AJ, 66, 300 Bellazzini, M., Fusi Pecci, F., & Ferraro, F. R. 1996, MNRAS, 278, 947 Cardelli, J. A., Clayton, G. C., & Mathis, J. S. 1989, ApJ, 345, 245 Carney, B. W., & Seitzer, P. 1986, AJ, 92, 23 (CS) Ebeling, H., Edge, A. C., B¨ohringer, H., Allen, S. W., Crawford, C. S., Fabian, A. C., Voges, W., & Huchra, J. P. 1998, MNRAS, 301, 881

Fahlman, G. G., Mandushev, G., Richer, H. B., Thompson, I. B., & Sivaramakrishnan, A. 1996, ApJL, 459, L65.

Ibata, R., Lewis, G. F., Irwin, M., Totten, E., & Quinn, T. 2000a, ApJ, submitted (astroph/0004011)

Ibata, R. A., Wyse, R. F. G., Gilmore, G., Irwin, M. J., & Suntzeff, N. B. 1997, AJ, 113, 634

Irwin, M. J., & Hatzidimitriou, D. 1995, MNRAS, 277, 1354 (IH) Klessen, R. S., & Kroupa, P. 1998, ApJ, 498, 143 Kuhn, J. R., & Miller, R. H. 1989, ApJ, 341, L41 Kuhn, J. R., Smith, H. A., & Hawley, S. L. 1996, ApJL, 469, L93 (KSH) Landolt, A. U. 1983, AJ, 88, 439 Landolt, A. U. 1992, AJ, 104, 340 Lin, D. N. C., & Murray, S. D. 1998, in Dwarf Galaxies and Cosmology, ed. T. X. Thuan, C. Balkowski, V. Cayatte, & J. T. T. Van (Paris: Editions Frontieres), 433

Majewski, S. R., Ostheimer, J. C., Patterson, R., Kunkel, W. E., Johnston, K. V., & Geisler, D. 2000, AJ, 119, 760 (M2K)

Majewski, S. R., Siegel, M. H., Kunkel, W. E., Reid, I. N., Johnston, K. V., Thompson, I. B., Landolt, A. U., & Palma, C. 1999, AJ, 118, 1709

Mateo, M., Mirabal, N., Udalski, A., Szyman´ski, M., Kaluz˙ny, J., Kubiak, M., Krzemin´ski, W., and Stanek, K. Z. 1996, ApJL, 458, L13

Mateo, M., Olszewski, E. W., & Morrison, H. L. 1998, ApJ, 508, L55 McClure, R. D., VandenBerg, D. A., Bell, R. A., Hesser, J. E., and Stetson, P. B. 1987, AJ, 93, 1144

Monet, D. et al. 1998, USNO-A V2.0, A Catalog of Astrometric Standards (Washington, DC: US Naval Observatory)

Morrison, H. L., Olszewski, E. W., Mateo, M., Norris, J. E., Harding, P., Dohm-Palmer, R. C., & Freeman, K. C. 2000, AJ, submitted

Oh, K. S., Lin, D. N. C., & Aarseth, S. J. 1995, ApJ, 442, 142 Olszewski, E. W. 1998, in ASP Conf. Ser. 136, Galactic Halos: A UC Santa Cruz Workshop, ed. D. Zaritsky (San Francisco: ASP), 70

Schlegel, D. J., Finkbeiner, D. P., & Davis, M. 1998, ApJ, 500, 525 Stetson, P.B. 1992, in ASP Conf. Ser. Vol. 25, Astronomical Data Analysis Software and Systems, ed. D. M. Worrall, C. Biemesderfer, & J. Barnes (San Francisco: ASP), 297 Stetson, P. B., VandenBerg, D. A., & McClure, R. D. 1985, PASP, 97, 908 (SVM) Totten, E. J., & Irwin, M. J. 1998, MNRAS, 294, 1 Totten, E. J., Irwin, M. J., & Whitelock, P. 2000, MNRAS, 314, 630 Webbink, R. F. 1985, in IAU Symp. 113, Dynamics of Star Clusters, ed. J. Goodman & P. Hut (Dordrecht: Reidel), 541

Powered by OpenAIRE Open Research Graph
Any information missing or wrong?Report an Issue
publication . Other literature type . Preprint . Article . 2001

Stars of the Draco Dwarf Spheroidal Galaxy Beyond Its Measured Tidal Boundary

Slawomir Piatek; Carlton Pryor; Taft E. Armandroff; Edward W. Olszewski;