SDSS J1001+5027

SDSS J1001+5027
Gravitationally lensed quasar SDSS J1001+5027, as seen through SDSS.
Observation data (J2000.0 epoch)
ConstellationUrsa Major
Right ascension10h 01m 28.61s
Declination+50° 27′ 56.90″
Redshift1.841318
Heliocentric radial velocity552,013 km/s
Distance9.899 Gly
Apparent magnitude (V)17.70
Apparent magnitude (B)17.90
Characteristics
TypeHiBAL
Other designations
2MASX J10012847+5027573, SDSS J100128.61+502756.8, LQAC 150+050 007, LAMOST J100128.61+502756.8, PGC 3509563

SDSS J1001+5027 is a gravitationally lensed quasar located in the constellation of Ursa Major. The redshift of the object is (z) 1.841[1] and was discovered in March 2005 by Masamune Oguri during the Sloan Digital Sky Survey along with another lensed quasar, SDSS J120629.65+433217.6 (SDSS 1206+4332).[2]

Description

SDSS J1001+5027 is described as a double imaged quasar.[3] When imaged, the object is split into two components with a slightly large separation gap of 2.86 arcseconds and displaying a rich system of emission lines including cerium, triply ionized chromium and magnesium.[2] The foreground lensing galaxy of SDSS J1001+5027 is estimated to lie at (z) 0.415 based on a study by Noahisa Inada published in 2012.[4] A possible secondary lens galaxy and large galaxy density enhancement were also discovered, suggesting the contribution of the quasar's large image separation.[2]

The R-band light curve monitoring observations conducted for more than six years, found that SDSS J1001+5027 has evidence of time-delays but however proven uncertain. Based combining results from five different methods, the time-delay is said to be -119.3 ± 3.3 days, with component A leading component B.[5] Amir Aghamousa would later give a new time-delay estimate of 117 days for the quasar, based on the application of a mirror estimator in his study, published in 2017.[3] An official time-delay estimate of 120.93 ± 1.015 days was finally given for the quasar in 2023 by astronomers utilizing a TD-CARMA Bayesian technique.[6]

Additional information also showed, both of the components display strong variability; for instance component A had a large variability amplitude as high as 0.25 magnitude during observation periods conducted from 2006 to 2007.[5] Optical data, also revealed both components underwent a steady decrease in brightness levels by around 0.2 magnitude during the first 200 days of observations with the Nordic Optical Telescope.[7] Several other smaller variation features on short-scale, were shown on the curves in additional to both strong variability and decrease of brightness in the quasar.[5]

It is found SDSS J1001+507 is a broad absorption-line quasar. When observed with Subaru Telescope, the spectrum of both quasar components display absorption profiles, described as variable with a rotational velocity of 18,000 kilometer per seconds and at a radial distance of 0.06 parsecs through assumption of Keplerian motion. Six narrow-line absorption systems were found in addition, located at various redshifts between 0.41 and 1.75, with the magnesium system being the only one to display time variability and a velocity shear of 30 kilometers per seconds. The quasar shows outflowing wind and has a supermassive black hole mass of 9.66 ± 0.06 Mʘ with a source continuum size of (2.2 ± 0.3) x 10-3 parsecs.[8] An accretion disk size of 4.6+10.5-3.2 at rest frame of 1736Å via microlensing, has been calculated for the quasar.[9]

References

  1. ^ Moravec, E. A.; Hamann, F.; Capellupo, D. M.; McGraw, S. M.; Shields, J. C.; Rodríguez Hidalgo, P. (2017-03-29). "HST and ground-based spectroscopy of quasar outflows: from mini-BALs to BALs". Monthly Notices of the Royal Astronomical Society. 468 (4): 4539–4555. arXiv:1703.10691. doi:10.1093/mnras/stx775. ISSN 0035-8711.
  2. ^ a b c Oguri, Masamune; Inada, Naohisa; Hennawi, Joseph F.; Richards, Gordon T.; Johnston, David E.; Frieman, Joshua A.; Pindor, Bartosz; Strauss, Michael A.; Brunner, Robert J.; Becker, Robert H.; Castander, Francisco J.; Gregg, Michael D.; Hall, Patrick B.; Rix, Hans-Walter; Schneider, Donald P. (March 2005). "Discovery of Two Gravitationally Lensed Quasars with Image Separations of 3" from the Sloan Digital Sky Survey". The Astrophysical Journal. 622 (1): 106–115. arXiv:astro-ph/0411250. Bibcode:2005ApJ...622..106O. doi:10.1086/428087. ISSN 0004-637X.
  3. ^ a b Aghamousa, Amir; Shafieloo, Arman (January 2017). "Time delay Analysis of the Lensed Quasar SDSS J1001+5027". The Astrophysical Journal. 834 (1): 31. arXiv:1603.06331. Bibcode:2017ApJ...834...31A. doi:10.3847/1538-4357/834/1/31. ISSN 0004-637X.
  4. ^ Oguri, Masamune; Inada, Naohisa; Strauss, Michael A.; Kochanek, Christopher S.; Kayo, Issha; Shin, Min-Su; Morokuma, Tomoki; Richards, Gordon T.; Rusu, Cristian E.; Frieman, Joshua A.; Fukugita, Masataka; Schneider, Donald P.; York, Donald G.; Bahcall, Neta A.; White, Richard L. (May 2012). "The Sloan Digital Sky Survey Quasar Lens Search. VI. Constraints on Dark Energy and the Evolution of Massive Galaxies". The Astronomical Journal. 143 (5): 120. arXiv:1203.1088. Bibcode:2012AJ....143..120O. doi:10.1088/0004-6256/143/5/120. ISSN 0004-6256.
  5. ^ a b c Kumar, S. Rathna; Tewes, M.; Stalin, C. S.; Courbin, F.; Asfandiyarov, I.; Meylan, G.; Eulaers, E.; Prabhu, T. P.; Magain, P.; Winckel, H. Van; Ehgamberdiev, Sh (2013-09-01). "COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses - XIV. Time delay of the doubly lensed quasar SDSS J1001+5027". Astronomy & Astrophysics. 557: A44. arXiv:1306.5105. Bibcode:2013A&A...557A..44R. doi:10.1051/0004-6361/201322116. ISSN 0004-6361.
  6. ^ Meyer, Antoine D.; van Dyk, David A.; Tak, Hyungsuk; Siemiginowska, Aneta (2023-06-01). "TD-CARMA: Painless, Accurate, and Scalable Estimates of Gravitational Lens Time Delays with Flexible CARMA Processes". The Astrophysical Journal. 950 (1): 37. arXiv:2207.09327. Bibcode:2023ApJ...950...37M. doi:10.3847/1538-4357/acbea1. ISSN 0004-637X.
  7. ^ Paraficz, D.; Hjorth, J.; Elíasdóttir, Á (2009-05-01). "Results of optical monitoring of 5 SDSS double QSOs with the Nordic Optical Telescope" (PDF). Astronomy & Astrophysics. 499 (2): 395–408. arXiv:0903.1027. Bibcode:2009A&A...499..395P. doi:10.1051/0004-6361/200811387. ISSN 0004-6361.
  8. ^ Misawa, Toru; Inada, Naohisa; Oguri, Masamune; Charlton, Jane C.; Eracleous, Michael; Koyamada, Suzuka; Itoh, Daisuke (2018-02-10). "Spectroscopic Observations of the Outflowing Wind in the Lensed Quasar SDSS J1001+5027". The Astrophysical Journal. 854 (1): 69. arXiv:1801.04071. Bibcode:2018ApJ...854...69M. doi:10.3847/1538-4357/aaa66e. ISSN 0004-637X.
  9. ^ Jiménez-Vicente, J.; Mediavilla, E.; Muñoz, J. A.; Kochanek, C. S. (June 2012). "A Robust Determination of the Size of Quasar Accretion Disks Using Gravitational Microlensing". The Astrophysical Journal. 751 (2): 106. arXiv:1201.3187. Bibcode:2012ApJ...751..106J. doi:10.1088/0004-637X/751/2/106. ISSN 0004-637X.
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