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RX J0911.4+0551

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RX J0911.4+0551
The gravitationally lensed quasar, RX J0911.4+0551.
Observation data (J2000.0 epoch)
ConstellationHydra
Right ascension09h 11m 27.6420s
Declination+05° 50′ 54.171″
Redshift2.798188
Heliocentric radial velocity838,876 km/s
Distance10.995 Gly
Apparent magnitude (V)18.16
Apparent magnitude (B)18.44
Characteristics
TypeBAL QSO
Other designations
SDSS J091127.61+055054.1, LQAC 137+005 008, 1RXS J091127.8+055113

RX J0911.4+0551 is a gravitationally-lensed quasar located in the constellation of Hydra. It has a high redshift of (z) 2.800 and was first discovered by astronomers who were conducting the ROSAT All-Sky Survey in 1997. This object is classified as a radio-quiet with an X-ray luminosity of 4.1046 ergs.[1]

Description

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RX J0911.4+0551 is a quadruped imaged quasar with a wide angular separation of 3.1 arcseconds.[2] When imaged by high resolution imaging by both Nordic Optical Telescope and New Technology Telescope, it is found to be split into four images and lensed by a foreground galaxy located at a redshift of (z) 0.769.[2][3] The lens galaxy is described as elongated based on I-band imaging; apparently looking like as an edge-on spiral with a bright nucleus and elongated diffused disk, according to near-infrared imaging.[4] This lensed galaxy is known to be located in a galaxy cluster which in turn displays an extreme shear distortion for this lensing effect.[5][3]

The optical light curves of the components of RX J0911.4+0551 showed it has time delays. Based on results, the time delay is found significantly short with a period of 146 ± 8 days between the two observed components identified as A and B. The component (B) is found to be the leading component.[5] Raw and deconvolved imaging by Chandra X-ray Observatory also showed it as extended along east to west direction. An emission profile made up of a bright component was also found located southwest of B, being stretched towards the quasar's direction.[6]

The host galaxy of RX J0911.4+0551 is described to be young galaxy in stages of evolving without indications of a major merger.[7] It has a star formation rate of 140 Mʘ yr-1 and found to produce a molecular outflows reaching a rate of 180 Mʘ yr-1 indicating the large fraction of gas would be depleted within a lifetime of 100 million years.[8] Observations by the Plateau de Bure Interferometer also showed the host's low gas mass is 2.3 ± 0.5 x 109 Mʘ and it has a total far-infrared luminosity rate measuring as 7.2 ± 1011 Lʘ.[9] The host also has a carbon monoxide (CO) (5-4) line profile displaying a compact structure based on observations by Atacama Large Millimetre Array, with a full width at half maximum measuring 133 ± 3 kilometers per seconds.[10]

Several absorption line systems located at redshifts of (z) 2.790, 2.42 and 2.63 have been identified in the quasar's A and B spectra. Since these absorption lines display a velocity dispersion of around 1,000 kilometers per seconds, the quasar has a mini broad absorption line.[11] A rapid flare has been detected by Chandra with a duration of 2,000 seconds in November 2000.[12][13]

References

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  1. ^ Bade, N.; Siebert, J.; Lopez, S.; Voges, W.; Reimers, D. (January 1997). "RX J0911.4+0551: A new multiple QSO selected from the ROSAT All-Sky Survey". Astronomy and Astrophysics. 317: L13 – L16. Bibcode:1997A&A...317L..13B. ISSN 0004-6361.
  2. ^ a b Burud, I.; Courbin, F.; Lidman, C.; Jaunsen, A. O.; Hjorth, J.; Østensen, R.; Andersen, M. I.; Clasen, J. W.; Wucknitz, O.; Meylan, G.; Magain, P.; Stabell, R.; Refsdal, S. (July 1998). "High-Resolution Optical and Near-Infrared Imaging of the Quadruple Quasar RX J0911.4+0551". The Astrophysical Journal. 501 (1): L5 – L10. arXiv:astro-ph/9803175. Bibcode:1998ApJ...501L...5B. doi:10.1086/311450. ISSN 0004-637X.
  3. ^ a b Kneib, Jean-Paul; Cohen, Judith G.; Hjorth, Jens (November 2000). "RX J0911+05: A Massive Cluster Lens at z=0.769". The Astrophysical Journal. 544 (1): L35 – L39. arXiv:astro-ph/0006106. Bibcode:2000ApJ...544L..35K. doi:10.1086/317285. ISSN 0004-637X.
  4. ^ Burud, I.; Courbin, F.; Lidman, C.; Meylan, G.; Magain, P.; Jaunsen, A. O.; Hjorth, J.; Østensen, R.; Andersen, M. I.; Clasen, J. W.; Stabell, R.; Refsdal, S. (June 1998). "RX J0911.4+0551: a complex quadruply imaged gravitationally lensed QSO". The Messenger. 92: 29–32. Bibcode:1998Msngr..92...29B. ISSN 0722-6691.
  5. ^ a b Hjorth, Jens; Burud, Ingunn; Jaunsen, Andreas O.; Schechter, Paul L.; Kneib, Jean-Paul; Andersen, Michael I.; Korhonen, Heidi; Clasen, Jacob W.; Kaas, A. Amanda; Østensen, Roy; Pelt, Jaan; Pijpers, Frank P. (June 2002). "The Time Delay of the Quadruple Quasar RX J0911.4+0551". The Astrophysical Journal. 572 (1): L11 – L14. arXiv:astro-ph/0205124. Bibcode:2002ApJ...572L..11H. doi:10.1086/341603. ISSN 0004-637X.
  6. ^ Morgan, N. D.; Chartas, G.; Malm, M.; Bautz, M. W.; Burud, I.; Hjorth, J.; Jones, S. E.; Schechter, P. L. (July 2001). "ChandraX-Ray Observations of the Quadruply Lensed Quasar RX J0911.4+0551". The Astrophysical Journal. 555 (1): 1–6. arXiv:astro-ph/0103041. Bibcode:2001ApJ...555....1M. doi:10.1086/321454. ISSN 0004-637X.
  7. ^ Tuan-Anh, P.; Hoai, D. T.; Nhung, P. T.; Diep, P. N.; Phuong, N. T.; Thao, N. T.; Darriulat, P. (2017-01-25). "On the dust and gas components of the z = 2.8 gravitationally lensed quasar host RX J0911.4+0551". Monthly Notices of the Royal Astronomical Society: stx212. doi:10.1093/mnras/stx212. ISSN 0035-8711.
  8. ^ Weiß, A.; Walter, F.; Downes, D.; Carrili, C. L.; Henkel, C.; Menten, K. M.; Cox, P. (2012-06-19). "ON THE VARIATIONS OF FUNDAMENTAL CONSTANTS AND ACTIVE GALACTIC NUCLEUS FEEDBACK IN THE QUASI-STELLAR OBJECT HOST GALAXY RXJ0911.4+0551 atz= 2.79". The Astrophysical Journal. 753 (2): 102. arXiv:1204.5614. Bibcode:2012ApJ...753..102W. doi:10.1088/0004-637x/753/2/102. ISSN 0004-637X.
  9. ^ Anh, P. T.; Boone, F.; Hoai, D. T.; Nhung, P. T.; Weiß, A.; Kneib, J.-P.; Beelen, A.; Salomé, P. (April 2013). "Resolving the molecular gas around the lensed quasar RXJ0911.4+0551". Astronomy and Astrophysics. 552: L12. arXiv:1303.6110. Bibcode:2013A&A...552L..12A. doi:10.1051/0004-6361/201321363. ISSN 0004-6361.
  10. ^ Stacey, H R; McKean, J P; Powell, D M; Vegetti, S; Rizzo, F; Spingola, C; Auger, M W; Ivison, R J; van der Werf, P P (2021-01-21). "The rocky road to quiescence: compaction and quenching of quasar host galaxies at z ∼ 2". Monthly Notices of the Royal Astronomical Society. 500 (3): 3667–3688. doi:10.1093/mnras/staa3433. ISSN 0035-8711.
  11. ^ Anguita, T.; Faure, C.; Yonehara, A.; Wambsganss, J.; Kneib, J.-P.; Covone, G.; Alloin, D. (2008-04-01). "Integral field spectroscopy of four lensed quasars: analysis of their neighborhood and evidence for microlensing". Astronomy & Astrophysics. 481 (3): 615–627. arXiv:0802.0370. Bibcode:2008A&A...481..615A. doi:10.1051/0004-6361:20077306. ISSN 0004-6361.
  12. ^ "Chandra Press Room :: Flickering Quasar Helps Chandra Measure the Expansion Rate of the universe :: November 6, 2000". chandra.harvard.edu. Retrieved 2025-04-26.
  13. ^ Chartas, G.; Dai, X.; Gallagher, S. C.; Garmire, G. P.; Bautz, M. W.; Schechter, P. L.; Morgan, N. D. (September 2001). "ChandraDetects a Rapid Flare in the Gravitationally Lensed Mini–Broad Absorption Line QSO RX J0911.4+0551". The Astrophysical Journal. 558 (1): 119–126. arXiv:astro-ph/0104453. Bibcode:2001ApJ...558..119C. doi:10.1086/322453. ISSN 0004-637X.
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