Further Spectroscopic Observations of the CSL 1 Object | Zendy

M. V. Sazhin | Zendy; M. Capaccioli | Zendy; G. Longo | Zendy; M. Paolillo | Zendy; O. S. Khovanskaya | Zendy

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Further Spectroscopic Observations of the CSL 1 Object

Author(s) -

M. V. Sazhin,

M. Capaccioli,

G. Longo,

M. Paolillo,

O. S. Khovanskaya

Publication year - 2005

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/499429

Subject(s) - physics , gravitational lens , interpretation (philosophy) , cosmic string , astrophysics , object (grammar) , string (physics) , lens (geology) , cosmic cancer database , stars , astronomy , theoretical physics , optics , computer science , artificial intelligence , redshift , galaxy , programming language

CSL 1 is a peculiar object (R.A = 12(h)23(m)30(s).5, decl. = -12 degrees 38'57''.0 [J2000.0]) that, because of its photometric and spectroscopic properties, is possibly the first case of gravitational lensing by a cosmic string. In this Letter we present additional evidence, based on medium to high resolution VLT + FORS1 observations, that the spectra of the two components of CSL 1 are identical within a confidence level higher than 98% and that the velocity difference of the two components is consistent with zero. This result adds further confidence to the interpretation of the system as a true lens

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