Searching for the Physical Drivers of Eigenvector-1: From Quasars to Nano-Quasars

Details Searching for the Physical Drivers of Eigenvector-1: From Quasars to Nano-Quasars Searching for the Physical Drivers of Eigenvector-1: From Quasars to Nano-Quasars

Publishing date

2002-04-25

URL

arxiv.org/abs/astro-ph/0204423v1

Science

Astronomy and Astrophysics

Field

Astrophysics

Additional info

5 pages, 2 figures, accepted by the Astrophysical Journal (Letters)

Type

Scientific paper

Digital Object Identifier

10.1086/341367

Abstract

We point out an analogy between two accreting white dwarfs with jets (CH Cyg and MWC 560) and powerful quasars. In spite of the enormous difference in the mass of the central object (a factor about 10^7), the emission lines are strikingly similar to those of I Zw1 (the prototype "Narrow Line Seyfert 1" nucleus whose spectrum is widely used as an FeII template for almost all quasars). The spectral similarity give us the unique possibility to consider the optical Eigenvector-1 diagram using objects less massive by a factor of millions. Our results reinforce the interpretation of the "Eigenvector-1 correlations" found for low redshift quasars as driven mainly by the source luminosity to central compact object mass ratio(L/M). The accreting white dwarfs CH Cyg and MWC 560, their jets and emission lines, may well represent the low energy, non relativistic end of the accretion phenomena, which encompass the most powerful quasars and the microquasars. The remarkable similarities suggest that they may be legitimately considered "nano-quasars".

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