Microlensing of the Broad Emission Line Region in the Quadruple Lens SDSS J1004+4112
We present seven epochs of spectroscopy on the quadruply imaged quasar SDSS J1004+4112, spanning observed-frame time delays from 1 to 322 days. The spectra reveal differences in the emission lines between the lensed images. Specifically, component A showed a strong enhancement in the blue wings of s...
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| Veröffentlicht in: | The Astrophysical journal 2004-08, Vol.610 (2), p.679-685 |
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| creator | Richards, Gordon T Keeton, Charles R Pindor, Bartosz Hennawi, Joseph F Hall, Patrick B Turner, Edwin L Inada, Naohisa Oguri, Masamune Ichikawa, Shin-Ichi Becker, Robert H Gregg, Michael D White, Richard L Wyithe, J. Stuart B Schneider, Donald P Johnston, David E Frieman, Joshua A Brinkmann, J |
| description | We present seven epochs of spectroscopy on the quadruply imaged quasar SDSS J1004+4112, spanning observed-frame time delays from 1 to 322 days. The spectra reveal differences in the emission lines between the lensed images. Specifically, component A showed a strong enhancement in the blue wings of several high-ionization lines relative to component B, which lasted at least 28 days (observed frame) and then faded. Since the predicted time delay between A and B is ~30 days, our time coverage suggests that the event was not intrinsic to the quasar. We attribute these variations to microlensing of part of the broad emission line region of the quasar, apparently resolving structure in the source plane on a scale of [approx]10 super(16) cm at z = 1.734. In addition, we observed smaller differences in the emission-line profiles between components A and B that persisted throughout the time span, which may also be due to microlensing or millilensing. Further spectroscopic monitoring of this system holds considerable promise for resolving the structure of the broad emission line region in quasars. |
| doi_str_mv | 10.1086/421868 |
| format | Article |
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Since the predicted time delay between A and B is ~30 days, our time coverage suggests that the event was not intrinsic to the quasar. We attribute these variations to microlensing of part of the broad emission line region of the quasar, apparently resolving structure in the source plane on a scale of [approx]10 super(16) cm at z = 1.734. In addition, we observed smaller differences in the emission-line profiles between components A and B that persisted throughout the time span, which may also be due to microlensing or millilensing. 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We attribute these variations to microlensing of part of the broad emission line region of the quasar, apparently resolving structure in the source plane on a scale of [approx]10 super(16) cm at z = 1.734. In addition, we observed smaller differences in the emission-line profiles between components A and B that persisted throughout the time span, which may also be due to microlensing or millilensing. Further spectroscopic monitoring of this system holds considerable promise for resolving the structure of the broad emission line region in quasars.</description><subject>Astronomy</subject><subject>Characteristics and properties of external galaxies and extragalactic objects</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Gravitational lenses and luminous arcs</subject><subject>Quasars</subject><subject>Quasars. Active or peculiar galaxies, objects, and systems</subject><subject>Stellar systems. 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| subjects | Astronomy Characteristics and properties of external galaxies and extragalactic objects Earth, ocean, space Exact sciences and technology Gravitational lenses and luminous arcs Quasars Quasars. Active or peculiar galaxies, objects, and systems Stellar systems. Galactic and extragalactic objects and systems. The universe |
| title | Microlensing of the Broad Emission Line Region in the Quadruple Lens SDSS J1004+4112 |
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