In:
Publications of the Astronomical Society of Japan, Oxford University Press (OUP), Vol. 60, No. 4 ( 2008-08-25), p. 715-729
Abstract:
We carried out a detailed analysis of the NANTEN $^{12}$CO ($J=$ 1–0) dataset in two large areas towards SS 433 ($l \sim$ 40$^\circ$) and $l \sim$ 348${\rlap{\hskip.75pt{^\circ}}\hskip.75pt.\hskip1pt}$5. In SS 433, we detected ten clouds, which are well aligned nearly along the axis of an X-ray jet emanating from SS 433 at $V_{\rm LSR}$ = 42–56 km s$^{-1}$. The total length of the feature is $\sim\;$300 pc, three-times longer than that of the X-ray jet, at 3 kpc. Towards $l \sim$348${\rlap{\hskip.75pt{^\circ}}\hskip.75pt.\hskip1pt}$5, we detected four aligned clouds at $V_{\rm LSR}$ = $-$80–$-$100 km s$^{-1}$, nearly perpendicular to the Galactic plane. The total length of the feature is $\sim\;$400 pc at 6 kpc. In both cases, the CO clouds are distributed at $\mid{b}\mid\;\sim$ 1${}^\circ$–5${}^\circ$ and their alignments and coincidence in velocity should be rare, suggesting that they are physically associated. We present a scenario to explain these aligned clouds in which the interaction between a relativistic jet and the interstellar medium induced molecular cloud formation over the last $\sim\;$10$^{5\hbox{--}6}$yr. It is suggested that the timescale of the relativistic jet may be considerably larger, on the order of 10$^{5\hbox{--}6}$yr, than previously thought in SS 433. The driving engine of the jet is obviously SS 433, itself, in SS 433, although the engine is not yet identified in $l \sim$348${\rlap{\hskip.75pt{^\circ}}\hskip.75pt.\hskip1pt}$5 among possible several candidates detected in X-rays and TeV gamma rays.
Type of Medium:
Online Resource
ISSN:
0004-6264
,
2053-051X
DOI:
10.1093/pasj/60.4.715
Language:
English
Publisher:
Oxford University Press (OUP)
Publication Date:
2008
detail.hit.zdb_id:
2206640-8
detail.hit.zdb_id:
2083084-1
SSG:
16,12
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