Investigation of the Ultraluminous X-ray Source VII Zw 403 ULX in the X-ray and Optical Ranges

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Abstract

We present the results of our analysis of the series of X-ray observations, photometric and
spectroscopic monitoring for the ultraluminous X-ray source VII Zw 403 ULX (UGC 6456 ULX). Based
on a number of indirect signs, we hypothesize that the accretor in this binary system is a neutron star. We
have estimated the mass outflow rate in the object’s active state within the supercritical disk wind model to
be ≈4.0 × 10−5 M  yr−1.

About the authors

A. S. Vinokurov

Special Astrophysical Observatory, Russian Academy of Sciences

Email: vinokurov@sao.ru
Nizhnii Arkhyz, Karachai-Cherkessian Republic, 369167 Russia

K. E. Atapin

Sternberg Astronomical Institute,
Moscow State University

Email: vinokurov@sao.ru
Moscow, 119234 Russia

A. E. Kostenkov

Special Astrophysical Observatory, Russian Academy of Sciences

Email: vinokurov@sao.ru
Nizhnii Arkhyz, Karachai-Cherkessian Republic, 369167 Russia

Yu. N. Solovyeva

Special Astrophysical Observatory, Russian Academy of Sciences

Author for correspondence.
Email: vinokurov@sao.ru
Nizhnii Arkhyz, Karachai-Cherkessian Republic, 369167 Russia

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