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Abstract <p>We report on the discovery of rare emergence (31 nights from 363 nights of observations) of narrow absorption features in hydrogen and helium lines in stationary SS&#xa0;433 spectra with velocities ranging from ‒650 to –1900 km/s. The components arise independently of the appearance of P Cygni line profiles which are frequently observed in the SS&#xa0;433 stationary spectra with terminal velocities ranging from –200 to <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11444_2025_1702_Article_IEq1.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="75" /> </InlineMediaObject> <EquationSource Format="TEX">\( \sim {\kern 1pt} - {\kern 1pt} 2500\)</EquationSource> <!--AstEng2570198Dodin-m1--> </InlineEquation> km/s. The characteristic rising time of the transient absorptions is about one day and the decay time is about two days. The phenomenology of the absorptions suggests their origin due to hydrodynamic instabilities of wind outflows from a supercritical accretion disk in SS&#xa0;433.</p>

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Transient Narrow High-Velocity Absorptions in the Stationary Spectra of SS 433

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  • 发表日期：

    2025年8月1日

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  • A. V. Dodin,
  • K. A. Postnov,
  • A. M. Cherepashchuk,
  • A. M. Tatarnikov

摘要

Abstract

We report on the discovery of rare emergence (31 nights from 363 nights of observations) of narrow absorption features in hydrogen and helium lines in stationary SS 433 spectra with velocities ranging from ‒650 to –1900 km/s. The components arise independently of the appearance of P Cygni line profiles which are frequently observed in the SS 433 stationary spectra with terminal velocities ranging from –200 to \( \sim {\kern 1pt} - {\kern 1pt} 2500\) km/s. The characteristic rising time of the transient absorptions is about one day and the decay time is about two days. The phenomenology of the absorptions suggests their origin due to hydrodynamic instabilities of wind outflows from a supercritical accretion disk in SS 433.