3C 270.1 is a radio-loud quasar located in the constellation of Canes Venatici. It has a redshift of (z) 1.528, appearing as a bright unidentified source but also containing one of the most powerful jets.[1][2] It is classfied as being core-dominated with broad absorption lines, making it a broad absorption line quasar (BAL QSO).[3] It is classfied as a galaxy merger with a supermassive black hole mass of 9.01 Mʘ,[4] with its host galaxy being orientated by a position angle of 100° in east-west direction.[5]
Description
3C 270.1 is described as either a bend or 'dog-leg' quasar.[6] Its radio structure is made up of two components measuring < 0.3 and 0.6 arcseconds respectively. There is a weak component located in north-west direction, described to have a low-brightness surface based on radio mapping observations at 15 GHz via a 5-kilometer telescope.[7] In addition, it has a powerful radio core resolved as a one-sided core-jet structure when imaged at both 8.4 and 15.4 GHz by Very Long Baseline Array with two co-linear radio lobes; one being offset and the other along the source's axis.[3][8] A knot is present between the core and southern lobe, indicating a jet. When imaged by very-long-baseline interferometry, the quasar has a faint feature with extensions located in south, north and perpendicular towards the axis of the jet in east direction.[9]
Observations by the Chandra X-ray Observatory found the quasar exhibiting an unabsorbed power-law emission. There is also the presence of extended X-ray emission originating from one or two components located in the double hotspot of the southern radio lobe. But for the northern hotspot, it showed no detections of emission although the south part of the lobe has faint traces of emission but is unassociated.[10]
A further analysis also finds 3C 270.1 has an emission ridge starting from a precursor component of the hotspot before extending towards the south-eastern hotspot peak. This in turn, changes direction which the ridge curves by 90° towards the secondary peak, showing a drop in surface brightness.[10]
In addition, magnesium ion absorbers were detected towards the quasar. These absorption systems lie at redshifts of (z) 1.5004, (z) 0.7423 and (z) 1.5000 respectively.[11] A cluster of red galaxies have also been detected, surrounding the quasar.[12]
References
- ^ Hilbert, B.; Chiaberge, M.; Kotyla, J. P.; Tremblay, G. R.; Stanghellini, C.; Sparks, W. B.; Baum, S.; Capetti, A.; Macchetto, F. D.; Miley, G. K.; O’Dea, C. P.; Perlman, E. S.; Quillen, A. (2016-07-01). "POWERFUL ACTIVITY IN THE BRIGHT AGES. I. A VISIBLE/IR SURVEY OF HIGH REDSHIFT 3C RADIO GALAXIES AND QUASARS". The Astrophysical Journal Supplement Series. 225 (1): 12. arXiv:1605.03196. doi:10.3847/0067-0049/225/1/12. ISSN 0067-0049.
- ^ Punsly, Brian; Marziani, Paola (2015-08-05). "The extreme ultraviolet spectrum of the kinetically dominated quasar 3C 270.1". Monthly Notices of the Royal Astronomical Society: Letters. 453 (1): L16 – L20. arXiv:1507.01579. doi:10.1093/mnrasl/slv091. ISSN 1745-3933.
- ^ a b Kunert-Bajraszewska, M.; Katarzyński, K.; Janiuk, A. (February 2015). "Broadband nuclear emission in two radio-loud broad absorption line quasars". Astronomy & Astrophysics. 574: A110. arXiv:1412.6931. doi:10.1051/0004-6361/201424729. ISSN 0004-6361.
- ^ Breiding, Peter; Chiaberge, Marco; Lambrides, Erini; Meyer, Eileen T.; Willner, S. P.; Hilbert, Bryan; Haas, Martin; Miley, George; Perlman, Eric S.; Barthel, Peter; O’Dea, Christopher P.; Capetti, Alessandro; Wilkes, Belinda; Baum, Stefi A.; Macchetto, Duccio F. (2024-03-01). "Powerful Radio-loud Quasars Are Triggered by Galaxy Mergers in the Cosmic Bright Ages". The Astrophysical Journal. 963 (2): 91. arXiv:2305.11804. doi:10.3847/1538-4357/ad19db. ISSN 0004-637X.
- ^ Lehnert, Matthew D.; Miley, George K.; Sparks, William B.; Baum, Stefi A.; Biretta, John; Golombek, Daniel; de Koff, Sigrid; Macchetto, Ferdinando D.; McCarthy, Patrick J. (August 1999). "HUBBLE SPACE TELESCOPE Snapshot Survey of 3CR Quasars: The Data". The Astrophysical Journal Supplement Series. 123 (2): 351–376. doi:10.1086/313239. ISSN 0067-0049.
- ^ Akujor, C. E.; Luedke, E.; Browne, I. W. A.; Leahy, J. P.; Garrington, S. T.; Jackson, N.; Thomasson, P. (1994-06-01). "Images of 25 extragalactic radio sources observed with MERLIN at 18 CM". Astronomy and Astrophysics Supplement Series. 105: 247–258. Bibcode:1994A&AS..105..247A. ISSN 0365-0138.
- ^ Riley, J. M.; Pooley, G. G. (September 1978). "15-GHz observations of the quasars 3C 270.1 and 3C 275.1". Monthly Notices of the Royal Astronomical Society. 184: 769–772. Bibcode:1978MNRAS.184..769R. doi:10.1093/mnras/184.4.769. ISSN 0035-8711.
- ^ Fernini, Ilias (2014-05-15). "VERY LARGE ARRAY IMAGES AT 8.4 GHz OF 40 FANAROFF-RILEY II 3CR RADIO SOURCES WITH 0.1 < z < 2.0". The Astrophysical Journal Supplement Series. 212 (2): 19. doi:10.1088/0067-0049/212/2/19. ISSN 0067-0049.
- ^ Hough, D. H.; Vermeulen, R. C.; Readhead, A. C. S.; Cross, L. L.; Barth, E. L.; Yu, L. H.; Beyer, P. J.; Phifer, E. M. (March 2002). "Parsec-Scale Radio Structure and Broad Optical Emission Lines in a Complete Sample of 3CR Lobe-dominated Quasars". The Astronomical Journal. 123 (3): 1258–1287. doi:10.1086/338847. ISSN 0004-6256.
- ^ a b Wilkes, Belinda J.; Lal, Dharam V.; Worrall, D. M.; Birkinshaw, Mark; Haas, Martin; Willner, S. P.; Antonucci, Robert; Ashby, M. L. N.; Avara, Mark; Barthel, Peter; Chini, Rolf; Fazio, G. G.; Hardcastle, Martin; Lawrence, Charles; Leipski, Christian (2012-01-20). "CHANDRA X-RAY OBSERVATIONS OF THE REDSHIFT 1.53 RADIO-LOUD QUASAR 3C 270.1". The Astrophysical Journal. 745 (1): 84. arXiv:1109.4395. doi:10.1088/0004-637x/745/1/84. ISSN 0004-637X.
- ^ Aldcroft, Thomas L.; Bechtold, Jill; Elvis, Martin (July 1994). "MG II absorption in a sample of 56 steep-spectrum quasars". The Astrophysical Journal Supplement Series. 93: 1. Bibcode:1994ApJS...93....1A. doi:10.1086/192044. ISSN 0067-0049.
- ^ Haas, Martin; Willner, S. P.; Heymann, Frank; Ashby, M. L. N.; Fazio, G. G.; Wilkes, Belinda J.; Chini, Rolf; Siebenmorgen, Ralf; Stern, Daniel (2009-04-01). "CLUSTERING OF RED GALAXIES AROUND THE z = 1.53 QUASAR 3C 270.1". The Astrophysical Journal. 695 (1): 724–731. arXiv:0901.0452. doi:10.1088/0004-637x/695/1/724. ISSN 0004-637X.
