1 / 28

MODULATION INDEX – GALACTIC LATITUDE RELATION

Explore the modulation index in extragalactic radio sources, analyzing variable quasar behavior and intrinsic variability. Study blazar data from the Green Bank Interferometer and UMRAO. Discover the radio emission behaviors of radio quiet and loud quasars through VLA monitoring.

lave
Télécharger la présentation

MODULATION INDEX – GALACTIC LATITUDE RELATION

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MODULATION INDEX – GALACTIC LATITUDE RELATION G. Tsarevsky ASTRO SPACE CENTER, Moscow

  2. EXTRAGALACTIC SOURCES RADIO VARIABILITY

  3. EXTRAGALACTIC SOURCES RADIO VARIABILITY INTRINSIC?

  4. EXTRAGALACTIC SOURCES RADIO VARIABILITY INTRINSIC? EXTRINSIC?

  5. QSO is an essentially variable stuff!

  6. QSO is an essentially variable stuff!

  7. It should vary in radio as well !

  8. It should vary in radio as well,and it really vary!

  9. Blazar 1514+197 Green Bank Interferometer data ISS is the variation over day to week, stronger at 2 GHz Intrinsic variation is over month to year, stronger at 8 GHz.

  10. H. D. Aller, M. F. Aller, Ph. A. Hughes, G. E. Latimer:University of Michigan Radio Observatory (UMRAO) Database 26-m dish; 4.8, 8.0, 14.5 GHz (including polarisation!), 25 yearshttp://www.astro.lsa.umich.edu/obs/radiotel/umrao.htmlE. B. Waltman et al., ApJS 77, 379, 1991:Green Bank Interferometer (GBI) Daily Observations Database2.25 and 8.3 GHz, 17 yearshttp://www.gb.nrao.edu/fgdocs/gbi/gbint.html

  11. ISS Geometry From Radio Galaxy Quasar or AGN 2000 pc

  12. Center  Anticenter  Poles:↓<m>C><m>AC><m>Poles

  13. What about m - |b| plot behavior?

  14. ApJ 618,108-140, 2004Radio Variability of Radio Quiet and Radio Loud QuasarsRichard BarvainisJoseph Leh´arMark BirkinshawHeino FalkeKatherine M. Blundell

  15. ApJ 618,108-140, 2004Radio Variability of Radio Quiet and Radio Loud QuasarsRichard BarvainisJoseph Leh´arMark BirkinshawHeino FalkeKatherine M. BlundellSubject headings: Quasars; Active Galaxies; Radio Emission

  16. VLA monitoring of RLQ and RQQ

  17. Some refs: N. Shapirovskaya, O.B. Slee, P. Hughes, & G. Tsarevsky "Radio Source Variability as a Tool for Very High Resolution" In: Proc. IAU Symposium No. 158, Sydney, eds. J. Robertson & W. Tango, Kluwer Acad. Press, 1993, p. 201-203 N. Shapirovskaya, O.B. Slee, & G. Tsarevsky "Galaxy Centre-Anticentre Asymmetry of the LFV Radio Source Distribution : Evidence of the Interstellar Matter Influence" In: Sub-arcsecond Radio Astronomy, eds. R. Davies & R. Booth, CUP, 1993, p.94 - 95

More Related