Weighing a galaxy bar in the lens Q2237+0305

被引：76
|
作者：
Schmidt, R
Webster, RL
Lewis, GF
机构：
[1] Univ Melbourne, Sch Phys, Parkville, Vic 3052, Australia
[2] SUNY Stony Brook, Stony Brook, NY 11794 USA
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1998年 / 295卷 / 02期
关键词：
galaxies; fundamental parameters; individual; 2237; 0305; spiral; gravitational lensing;
D O I：
10.1046/j.1365-8711.1998.01326.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In the gravitational lens system Q2237 + 0305 the cruciform quasar image geometry is twisted by 10 degrees by the lens effect of a bar in the lensing galaxy. This effect can be used to measure the mass of the bar. We construct a new lensing model for this system with a power-law elliptical bulge and a Ferrers bar. The observed ellipticity of the optical isophotes of the galaxy leads to a nearly isothermal elliptical profile for the bulge, with a total quasar magnification of 16(-4)(+5). We measure a bar mass of (7.5 +/- 1.5) x 10(8) h(75)(-1) M. in the region inside the quasar images.
引用
收藏
页码：488 / 496
页数：9
相关论文
共 47 条
  • [1] THE CENTRAL VELOCITY DISPERSION OF THE LENSING GALAXY IN THE QUADRUPLE LENS SYSTEM Q2237+0305
    FOLTZ, CB
    HEWETT, PC
    WEBSTER, RL
    LEWIS, GF
    ASTROPHYSICAL JOURNAL, 1992, 386 (02) : L43 - L45
  • [2] DIFFRACTION EFFECTS IN MICROLENSING OF Q2237+0305
    JAROSZYNSKI, M
    PACZYNSKI, B
    ASTROPHYSICAL JOURNAL, 1995, 455 (02) : 443 - 447
  • [3] INTERPRETATION OF MICROLENSING EVENTS IN Q2237+0305
    WITT, HJ
    MAO, S
    ASTROPHYSICAL JOURNAL, 1994, 429 (01) : 66 - 76
  • [4] A small source in Q2237+0305?
    Wyithe, JSB
    Webster, RL
    Turner, EL
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2000, 318 (03) : 762 - 768
  • [5] Microlensing of Q2237+0305: Simulations and statistics
    Jaroszynski, M.
    Skowron, J.
    ACTA ASTRONOMICA, 2006, 56 (02): : 171 - 182
  • [6] A measurement of the transverse velocity of Q2237+0305
    Wyithe, JSB
    Webster, RL
    Turner, EL
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1999, 309 (01) : 261 - 272
  • [7] Observational determination of the time delays in gravitational lens system Q2237+0305
    Vakulik, V
    Schild, R
    Dudinov, V
    Nuritdinov, S
    Tsvetkova, V
    Burkhonov, O
    Akhunov, T
    ASTRONOMY & ASTROPHYSICS, 2006, 447 (03) : 905 - 913
  • [8] CONTINUUM AND CIII] MICROLENSING IN Q2237+0305 AND THE QUASAR GEOMETRY
    RACINE, R
    ASTROPHYSICAL JOURNAL, 1992, 395 (02) : L65 - &
  • [9] Limits on the microlens mass function of Q2237+0305
    Wyithe, JSB
    Webster, RL
    Turner, EL
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2000, 315 (01) : 51 - 61
  • [10] The multiple quasar Q2237+0305 under a microlensing caustic
    Anguita, T.
    Schmidt, R. W.
    Turner, E. L.
    Wambsganss, J.
    Webster, R. L.
    Loomis, K. A.
    Long, D.
    McMillan, R.
    ASTRONOMY & ASTROPHYSICS, 2008, 480 (02) : 327 - 334
12345