PG 0026+129

PG 0026+129
SDSS image of PG 0026+129.
Observation data (J2000.0 epoch)
ConstellationPisces
Right ascension00h 29m 13.70s
Declination+13° 16′ 03.93″
Redshift0.142000
Heliocentric radial velocity42,571 km/s
Distance1.845 Gly
Apparent magnitude (V)15.41
Characteristics
TypeRQQ Sy1
Other designations
2MASSI J0029136+131603, PGC 1790, RBS 0068, 2E 0093, SDSS J002913.70+131603.9

PG 0026+129 is a Seyfert 1 galaxy and a radio-quiet quasar[1] located in the constellation of Pisces. The redshift for this object is (z) 0.142[2][3] and it was first discovered by R.F. Green in 1976 during a spectroscopic examination alongside three other quasars.[4]

Description

PG 0026+129 displays a rich system of emission-lines in its spectrum. However, the spectrum is very unusual since there is evidence of strong emission originating from its doubly ionized iron multiplets at 4570, 5190 and 5320 Å. In addition, the ultraviolet spectrum of the object is described as having a broad hump.[5]

The host galaxy of PG 0026+129 is an elliptical galaxy with a smooth appearance based on high-resolution studies.[6][7] The appearance of the galaxy is undisturbed but elongated slightly from east to west direction with no signs of an apparent structure.[8][9] The host galaxy has star-forming regions with the stellar mass of the stars in the H-band estimated to be 10.9 Mʘ and a total star formation rate of 16+6-8 Mʘ per year based on its Hβ and Paα luminosity.[10]

The radio source of PG 0026+129 is described as compact and extended based on Very Large Array observations, with half of its radio flux being contained within 2.5 arcsecond region. However its flat-spectrum radio core remains unresolved.[11] B-Array imaging found the source has an elongation north to south.[12] A nuclear component has been found with an extension of two arcseconds towards the south.[13]

PG 0026+129 is found to have two distinctive broad-line regions. Based on studies, it shows a broad Hβ line profile composed of one intermediate-width and one very broad component with full width at half maximum velocities of 1,964 ± 18 and 7,570 ± 83 kilometer per seconds. There is also evidence of velocity-resolved delays with time lags of 30 to 50 days at the Hβ line core with no signs of time lags in its wings.[14] A supermassive black hole mass of (3.93 ± 0.96) x 106 Mʘ has been calculated for the object based on its Paschen hydrogen emission line width and its continuum luminosity.[15] The narrow-line region of PG 0026+129 is estimated to have a radius of 2,281 ± 40 parsecs with a surface brightness of 1.47 10-17 erg s-1 towards the edge of the region.[16]

References

  1. ^ Baldwin, J. A.; Rees, M. J.; Longair, M. S.; Perryman, M. A. C. (December 1978). "The L-alpha/H-beta/P-alpha ratio in the quasar PG 0026+129". The Astrophysical Journal. 226: L57. Bibcode:1978ApJ...226L..57B. doi:10.1086/182830. ISSN 0004-637X.
  2. ^ "NED search results for PG 0026+129". NASA/IPAC Extragalactic Database. Retrieved 2025-08-09.
  3. ^ Treves, A.; Bouchet, P.; Chiappetti, L.; Ciapi, A.; Falomo, R.; Maraschi, L.; Tanzi, E. G. (July 1988). "The X-ray to infrared energy distribution of the quasar PG 0026+129". The Astrophysical Journal. 330: 178. Bibcode:1988ApJ...330..178T. doi:10.1086/166464. ISSN 0004-637X. Archived from the original on 2022-12-21.
  4. ^ Green, R. F. (October 1976). "A discovery program for bright quasars - Preliminary results". Publications of the Astronomical Society of the Pacific. 88: 665. Bibcode:1976PASP...88..665G. doi:10.1086/130006. ISSN 0004-6280.
  5. ^ Puetter, R. C.; Smith, H. E.; Soifer, B. T.; Willner, S. P.; Pipher, J. L. (December 1978). "Spectrophotometry of quasi-stellar objects at optical and infrared wavelengths: PG 0026+129 and 3C 273". The Astrophysical Journal. 226: L53 – L56. Bibcode:1978ApJ...226L..53P. doi:10.1086/182829. ISSN 0004-637X.
  6. ^ McLeod, K. K.; McLeod, B. A. (2001-01-10). "NICMOS Observations of Low-Redshift Quasar Host Galaxies". The Astrophysical Journal. 546 (2): 782–794. arXiv:astro-ph/0010127. Bibcode:2001ApJ...546..782M. doi:10.1086/318306. ISSN 0004-637X.
  7. ^ Ho, Luis C.; Kim, Minjin (2014-06-10). "The Black Hole Mass Scale of Classical and Pseudo Bulges in Active Galaxies". The Astrophysical Journal. 789 (1): 17. arXiv:1406.6137. Bibcode:2014ApJ...789...17H. doi:10.1088/0004-637x/789/1/17. ISSN 0004-637X.
  8. ^ Clements, D. L. (2000-02-01). "Far-infrared-loud quasars--I. Disturbed and quiescent quasars in the PG survey". Monthly Notices of the Royal Astronomical Society. 311 (4): 833–840. arXiv:astro-ph/9909420. Bibcode:2000MNRAS.311..833C. doi:10.1046/j.1365-8711.2000.03095.x. ISSN 0035-8711.
  9. ^ Guyon, O.; Sanders, D. B.; Stockton, Alan (September 2006). "Near-Infrared Adaptive Optics Imaging of QSO Host Galaxies". The Astrophysical Journal Supplement Series. 166 (1): 89–127. arXiv:astro-ph/0605079. Bibcode:2006ApJS..166...89G. doi:10.1086/505030. ISSN 0067-0049.
  10. ^ Young, J. E.; Eracleous, M.; Shemmer, O.; Netzer, H.; Gronwall, C.; Lutz, Dieter; Ciardullo, R.; Sturm, Eckhard (2013-12-17). "Locating star-forming regions in quasar host galaxies★". Monthly Notices of the Royal Astronomical Society. 438 (1): 217–239. arXiv:1311.1978. doi:10.1093/mnras/stt2145. ISSN 0035-8711.
  11. ^ Rudnick, L.; Sitko, M. L.; Stein, W. A. (June 1984). "The nature of radio-quiet QSOs-VLA observations of 0026 + 129, 0205 + 024, and 1351 + 640". The Astronomical Journal. 89: 753. Bibcode:1984AJ.....89..753R. doi:10.1086/113572. ISSN 0004-6256.
  12. ^ Leipski, C.; Falcke, H.; Bennert, N.; Hüttemeister, S. (2006-08-01). "The radio structure of radio-quiet quasars" (PDF). Astronomy & Astrophysics. 455 (1): 161–172. arXiv:astro-ph/0606540. Bibcode:2006A&A...455..161L. doi:10.1051/0004-6361:20054311. ISSN 0004-6361.
  13. ^ Kukula, Marek J.; Dunlop, James S.; Hughes, David H.; Rawlings, Steve (1998-06-21). "The radio properties of radio-quiet quasars". Monthly Notices of the Royal Astronomical Society. 297 (2): 366–382. arXiv:astro-ph/9802148. Bibcode:1998MNRAS.297..366K. doi:10.1046/j.1365-8711.1998.01481.x. ISSN 0035-8711.
  14. ^ Hu, Chen; Li, Sha-Sha; Guo, Wei-Jian; Yang, Sen; Yang, Zi-Xu; Bao, Dong-Wei; Jiang, Bo-Wei; Du, Pu; Li, Yan-Rong; Xiao, Ming; Songsheng, Yu-Yang; Yu, Zhe; Bai, Jin-Ming; Ho, Luis C.; Bian, Wei-Hao (2020-12-01). "Evidence for Two Distinct Broad-line Regions from Reverberation Mapping of PG 0026+129". The Astrophysical Journal. 905 (1): 75. arXiv:2010.09871. Bibcode:2020ApJ...905...75H. doi:10.3847/1538-4357/abc2da. ISSN 0004-637X.
  15. ^ Landt, Hermine; Ward, Martin J.; Peterson, Bradley M.; Bentz, Misty C.; Elvis, Martin; Korista, Kirk T.; Karovska, Margarita (2013-04-13). "A near-infrared relationship for estimating black hole masses in active galactic nuclei". Monthly Notices of the Royal Astronomical Society. 432 (1): 113–126. arXiv:1303.1923. doi:10.1093/mnras/stt421. ISSN 1365-2966.
  16. ^ Bennert, Nicola; Falcke, Heino; Schulz, Hartmut; Wilson, Andrew S.; Wills, Beverley J. (2002-08-01). "Size and Structure of the Narrow-Line Region of Quasars". The Astrophysical Journal. 574 (2): L105 – L109. arXiv:astro-ph/0206334. Bibcode:2002ApJ...574L.105B. doi:10.1086/342420. ISSN 0004-637X.
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