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Abstract <p>We present near-infrared spectroscopic monitoring of the carbon star RW LMi (2019–2024), revealing phase-dependent variations in molecular band depths and their anomalous behavior. Observations were obtained with the ASTRONIRCAM spectrograph on the 2.5-m telescope at the Caucasian Mountain Observatory. The detection of molecular bands across 1.1–2.3 <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\mu\)</EquationSource> <!--BPhysMGU2570199Vakhonin-m1--> </InlineEquation>m despite a dense, hot circumstellar dust envelope suggests their formation occurs within the envelope rather than in the stellar atmosphere.</p>

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IR Spectroscopy of the Carbon Star RW LMi

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • A. A. Vakhonin,
  • A. M. Tatarnikov,
  • S. G. Zheltoukhov,
  • V. I. Shenavrin

摘要

Abstract

We present near-infrared spectroscopic monitoring of the carbon star RW LMi (2019–2024), revealing phase-dependent variations in molecular band depths and their anomalous behavior. Observations were obtained with the ASTRONIRCAM spectrograph on the 2.5-m telescope at the Caucasian Mountain Observatory. The detection of molecular bands across 1.1–2.3 \(\mu\) m despite a dense, hot circumstellar dust envelope suggests their formation occurs within the envelope rather than in the stellar atmosphere.