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Diffuse Interstellar Band at 862 nm as a Reddening Tracer for GAIA

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Abstract

We investigate the plausibility of using diffuse interstellar band at862 nm for tracing interstellar extinction with the ESA's astrometric space mission GAIA. For this purpose we perform numerical tests to simulate the conditions of real observations, covering a wide range of stellar parameters and different amounts of interstellar extinction. Our simulations indicate that with the present Radial Velocity Spectrometer setup the uncertainty in color excess of σE(B-V)≤ 0.05 can be achieved only for the interstellar reddening tracers brighter than V ∼ 13. None of the plausible tracers can provide accurate color excesses (σ E(B-V) ≤ 0.05) at the distances beyond 2 kpc. We therefore conclude that with the currently planned instrumentation onboard GAIA this method can not be used as a stand-alone approach for probing interstellar extinction on the Galactic distance scales within the framework of the GAIA mission.

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References

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Authors and Affiliations

  1. Institute of Theoretical Physics and Astronomy, Goštauto 12, Vilnius, 2600, Lithuania

    Arūnas Kučinskas & Vladas Vansevičius

  2. Vilnius University Observatory, Čiurlionio 29, Vilnius, 2009, Lithuania

    Arūnas Kučinskas

Authors
  1. Arūnas Kučinskas
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  2. Vladas Vansevičius
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Kučinskas, A., Vansevičius, V. Diffuse Interstellar Band at 862 nm as a Reddening Tracer for GAIA. Astrophysics and Space Science 280, 119–124 (2002). https://doi.org/10.1023/A:1015578828412

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  • DOI: https://doi.org/10.1023/A:1015578828412

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