NGC 4319/Markarian 205 Association As a Template for Discordant Redshifts Explainable by the Transverse Doppler Effect

Details NGC 4319/Markarian 205 Association As a Template for Discordant Redshifts Explainable by the Transverse Doppler Effect NGC 4319/Markarian 205 Association As a Template for Discordant Redshifts Explainable by the Transverse Doppler Effect

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.7503o&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #75.03; Bulletin of the American Astronomical Society, Vol. 32, p.1521

Mathematics

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Scientific paper

Probably, the most intriguing case of closely associated objects having discordand redshifts is represented by the galaxy NGC 4319 (z=0.006) and a peculiar object Mrk 205 (z=0.07) just 40'' away [1]. The luminous connection extending from Mrk 205 into the galaxian nucleus as well as a corresponding feature on the opposite side of the disk linking the nucleus with a bright UV knot may indicate an explosive ejection of both the objects from the nucleus [2]. Below, I propose to explain the essentially discordant redshifts of Mrk 205 and the UV knot by ejecting them with a relativistic velocity, similar to the two redshifted peculiar objects aligned across NGC 4258 [3]. In my interpretation, the redshift of Mrk 205 includes (i) a receding component, zr=0.065, due to the transverse Doppler effect and (ii) a cosmological component, zc=0.006. The velocity of ejection and the angle between the direction of ejection and the line of sight are found to be vej/c=(zr+z_a) )1/2≈ 0.261 and \vartheta= arccos (zr-z_a) (z_r+z_a) -1/2≈ 76o.3, correspondingly, assuming the UV knot to approach with redshift za≈ 0.003 [2]. The proposed interpretation has a number of testable consequences, including the decisive test: Mrk 205 is expected to have an annual proper motion of >= 0.8 (D/20 Mpc) )-1 milliarcsec, which could be measured at radio wavelengths for the unresolved radio counterpart [4] to Mrk 205. If confirmed, this model would indicate that some pairs of quasar-like sources aligned with galaxies represent relativistic ejecta from the galactic nuclei, and the redshifts of those sources include a substantial component produced by the transverse Doppler effect.
References:
[1] Arp, H. 1995, IAU Symp. 168, p. 369 and refs. therein
[2] Sulentic, J.W. & Arp, H. 1987, ApJ 319, 687 and 693
[3] Ozernoy, L.M. 1996, Bull. Amer. Astr. Soc. 28, 846
[4] Sulentic, J.W. 1986, ApJ 304, 617

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