The Quadruple Gravitational Lens PG1115+080: Time Delays and Models
Astrophys.J. 475 (1997) L85-L88 Optical photometry is presented for the quadruple gravitational lens PG1115+080. A preliminary reduction of data taken from November 1995 to June 1996 gives component ``C'' leading component ``B'' by 23.7+/-3.4 days and components ``A1''...
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| creator | Schechter, P. L Bailyn, C. D Barr, R Barvainis, R Becker, C. M Bernstein, G. M Blakeslee, J. P Bus, S. J Dressler, A Falco, E. E Fesen, R. A Fischer, P Gebhardt, K Harmer, D Hewitt, J. N Hjorth, J Hurt, T Jaunsen, A. O Mateo, M Mehlert, D Richstone, D. O Sparke, L. S Thorstensen, J. R Tonry, J. L Wegner, G Willmarth, D. W Worthey, G |
| description | Astrophys.J. 475 (1997) L85-L88 Optical photometry is presented for the quadruple gravitational lens
PG1115+080. A preliminary reduction of data taken from November 1995 to June
1996 gives component ``C'' leading component ``B'' by 23.7+/-3.4 days and
components ``A1'' and ``A2'' by 9.4 days. A range of models has been fit to the
image positions, none of which gives an adequate fit. The best fitting and most
physically plausible of these, taking the lensing galaxy and the associated
group of galaxies to be singular isothermal spheres, gives a Hubble constant of
42 km/s/Mpc for Omega=1, with an observational uncertainty of 14%, as computed
from the B-C time delay measurement. Taking the lensing galaxy to have an
approximately E5 isothermal mass distribution yields H0=64 km/sec/Mpc while
taking the galaxy to be a point mass gives H0=84 km/sec/Mpc. The former gives a
particularly bad fit to the position of the lensing galaxy, while the latter is
inconsistent with measurements of nearby galaxy rotation curves. Constraints on
these and other possible models are expected to improve with planned HST
observations. |
| doi_str_mv | 10.48550/arxiv.astro-ph/9611051 |
| format | Article |
| fullrecord | <record><control><sourceid>arxiv_GOX</sourceid><recordid>TN_cdi_arxiv_primary_astro_ph_9611051</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>astro_ph_9611051</sourcerecordid><originalsourceid>FETCH-arxiv_primary_astro_ph_96110513</originalsourceid><addsrcrecordid>eNqNzbEKwjAQgOEsDqI-g7c4SdscGqmuVeugoNA9HPSkgbQNSVvs2wvSB3D6lx8-IdYo432qlEzIf8wQU-h8G7kqOR4QpcK5yIqK4dVT6XtnGXJPg-moM21DFu7cBHjmiKi2MpUnKEzNcGZLYwBqSni0JduwFLM32cCrqQuxuV6K7Bb9UO28qcmP-odrV-kJ3_37fQGwbj48</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>The Quadruple Gravitational Lens PG1115+080: Time Delays and Models</title><source>arXiv.org</source><creator>Schechter, P. L ; Bailyn, C. D ; Barr, R ; Barvainis, R ; Becker, C. M ; Bernstein, G. M ; Blakeslee, J. P ; Bus, S. J ; Dressler, A ; Falco, E. E ; Fesen, R. A ; Fischer, P ; Gebhardt, K ; Harmer, D ; Hewitt, J. N ; Hjorth, J ; Hurt, T ; Jaunsen, A. O ; Mateo, M ; Mehlert, D ; Richstone, D. O ; Sparke, L. S ; Thorstensen, J. R ; Tonry, J. L ; Wegner, G ; Willmarth, D. W ; Worthey, G</creator><creatorcontrib>Schechter, P. L ; Bailyn, C. D ; Barr, R ; Barvainis, R ; Becker, C. M ; Bernstein, G. M ; Blakeslee, J. P ; Bus, S. J ; Dressler, A ; Falco, E. E ; Fesen, R. A ; Fischer, P ; Gebhardt, K ; Harmer, D ; Hewitt, J. N ; Hjorth, J ; Hurt, T ; Jaunsen, A. O ; Mateo, M ; Mehlert, D ; Richstone, D. O ; Sparke, L. S ; Thorstensen, J. R ; Tonry, J. L ; Wegner, G ; Willmarth, D. W ; Worthey, G</creatorcontrib><description>Astrophys.J. 475 (1997) L85-L88 Optical photometry is presented for the quadruple gravitational lens
PG1115+080. A preliminary reduction of data taken from November 1995 to June
1996 gives component ``C'' leading component ``B'' by 23.7+/-3.4 days and
components ``A1'' and ``A2'' by 9.4 days. A range of models has been fit to the
image positions, none of which gives an adequate fit. The best fitting and most
physically plausible of these, taking the lensing galaxy and the associated
group of galaxies to be singular isothermal spheres, gives a Hubble constant of
42 km/s/Mpc for Omega=1, with an observational uncertainty of 14%, as computed
from the B-C time delay measurement. Taking the lensing galaxy to have an
approximately E5 isothermal mass distribution yields H0=64 km/sec/Mpc while
taking the galaxy to be a point mass gives H0=84 km/sec/Mpc. The former gives a
particularly bad fit to the position of the lensing galaxy, while the latter is
inconsistent with measurements of nearby galaxy rotation curves. Constraints on
these and other possible models are expected to improve with planned HST
observations.</description><identifier>DOI: 10.48550/arxiv.astro-ph/9611051</identifier><language>eng</language><subject>Physics - Astrophysics of Galaxies ; Physics - Cosmology and Nongalactic Astrophysics ; Physics - Earth and Planetary Astrophysics ; Physics - High Energy Astrophysical Phenomena ; Physics - Instrumentation and Methods for Astrophysics ; Physics - Solar and Stellar Astrophysics</subject><creationdate>1996-11</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,776,881</link.rule.ids><linktorsrc>$$Uhttps://arxiv.org/abs/astro-ph/9611051$$EView_record_in_Cornell_University$$FView_record_in_$$GCornell_University$$Hfree_for_read</linktorsrc><backlink>$$Uhttps://doi.org/10.48550/arXiv.astro-ph/9611051$$DView paper in arXiv$$Hfree_for_read</backlink><backlink>$$Uhttps://doi.org/10.1086/310478$$DView published paper (Access to full text may be restricted)$$Hfree_for_read</backlink></links><search><creatorcontrib>Schechter, P. L</creatorcontrib><creatorcontrib>Bailyn, C. D</creatorcontrib><creatorcontrib>Barr, R</creatorcontrib><creatorcontrib>Barvainis, R</creatorcontrib><creatorcontrib>Becker, C. M</creatorcontrib><creatorcontrib>Bernstein, G. M</creatorcontrib><creatorcontrib>Blakeslee, J. P</creatorcontrib><creatorcontrib>Bus, S. J</creatorcontrib><creatorcontrib>Dressler, A</creatorcontrib><creatorcontrib>Falco, E. E</creatorcontrib><creatorcontrib>Fesen, R. A</creatorcontrib><creatorcontrib>Fischer, P</creatorcontrib><creatorcontrib>Gebhardt, K</creatorcontrib><creatorcontrib>Harmer, D</creatorcontrib><creatorcontrib>Hewitt, J. N</creatorcontrib><creatorcontrib>Hjorth, J</creatorcontrib><creatorcontrib>Hurt, T</creatorcontrib><creatorcontrib>Jaunsen, A. O</creatorcontrib><creatorcontrib>Mateo, M</creatorcontrib><creatorcontrib>Mehlert, D</creatorcontrib><creatorcontrib>Richstone, D. O</creatorcontrib><creatorcontrib>Sparke, L. S</creatorcontrib><creatorcontrib>Thorstensen, J. R</creatorcontrib><creatorcontrib>Tonry, J. L</creatorcontrib><creatorcontrib>Wegner, G</creatorcontrib><creatorcontrib>Willmarth, D. W</creatorcontrib><creatorcontrib>Worthey, G</creatorcontrib><title>The Quadruple Gravitational Lens PG1115+080: Time Delays and Models</title><description>Astrophys.J. 475 (1997) L85-L88 Optical photometry is presented for the quadruple gravitational lens
PG1115+080. A preliminary reduction of data taken from November 1995 to June
1996 gives component ``C'' leading component ``B'' by 23.7+/-3.4 days and
components ``A1'' and ``A2'' by 9.4 days. A range of models has been fit to the
image positions, none of which gives an adequate fit. The best fitting and most
physically plausible of these, taking the lensing galaxy and the associated
group of galaxies to be singular isothermal spheres, gives a Hubble constant of
42 km/s/Mpc for Omega=1, with an observational uncertainty of 14%, as computed
from the B-C time delay measurement. Taking the lensing galaxy to have an
approximately E5 isothermal mass distribution yields H0=64 km/sec/Mpc while
taking the galaxy to be a point mass gives H0=84 km/sec/Mpc. The former gives a
particularly bad fit to the position of the lensing galaxy, while the latter is
inconsistent with measurements of nearby galaxy rotation curves. Constraints on
these and other possible models are expected to improve with planned HST
observations.</description><subject>Physics - Astrophysics of Galaxies</subject><subject>Physics - Cosmology and Nongalactic Astrophysics</subject><subject>Physics - Earth and Planetary Astrophysics</subject><subject>Physics - High Energy Astrophysical Phenomena</subject><subject>Physics - Instrumentation and Methods for Astrophysics</subject><subject>Physics - Solar and Stellar Astrophysics</subject><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1996</creationdate><recordtype>article</recordtype><sourceid>GOX</sourceid><recordid>eNqNzbEKwjAQgOEsDqI-g7c4SdscGqmuVeugoNA9HPSkgbQNSVvs2wvSB3D6lx8-IdYo432qlEzIf8wQU-h8G7kqOR4QpcK5yIqK4dVT6XtnGXJPg-moM21DFu7cBHjmiKi2MpUnKEzNcGZLYwBqSni0JduwFLM32cCrqQuxuV6K7Bb9UO28qcmP-odrV-kJ3_37fQGwbj48</recordid><startdate>19961106</startdate><enddate>19961106</enddate><creator>Schechter, P. L</creator><creator>Bailyn, C. D</creator><creator>Barr, R</creator><creator>Barvainis, R</creator><creator>Becker, C. 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W</au><au>Worthey, G</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Quadruple Gravitational Lens PG1115+080: Time Delays and Models</atitle><date>1996-11-06</date><risdate>1996</risdate><abstract>Astrophys.J. 475 (1997) L85-L88 Optical photometry is presented for the quadruple gravitational lens
PG1115+080. A preliminary reduction of data taken from November 1995 to June
1996 gives component ``C'' leading component ``B'' by 23.7+/-3.4 days and
components ``A1'' and ``A2'' by 9.4 days. A range of models has been fit to the
image positions, none of which gives an adequate fit. The best fitting and most
physically plausible of these, taking the lensing galaxy and the associated
group of galaxies to be singular isothermal spheres, gives a Hubble constant of
42 km/s/Mpc for Omega=1, with an observational uncertainty of 14%, as computed
from the B-C time delay measurement. Taking the lensing galaxy to have an
approximately E5 isothermal mass distribution yields H0=64 km/sec/Mpc while
taking the galaxy to be a point mass gives H0=84 km/sec/Mpc. The former gives a
particularly bad fit to the position of the lensing galaxy, while the latter is
inconsistent with measurements of nearby galaxy rotation curves. Constraints on
these and other possible models are expected to improve with planned HST
observations.</abstract><doi>10.48550/arxiv.astro-ph/9611051</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Physics - Astrophysics of Galaxies Physics - Cosmology and Nongalactic Astrophysics Physics - Earth and Planetary Astrophysics Physics - High Energy Astrophysical Phenomena Physics - Instrumentation and Methods for Astrophysics Physics - Solar and Stellar Astrophysics |
| title | The Quadruple Gravitational Lens PG1115+080: Time Delays and Models |
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