Near-infrared Spectral Characterization of Solar-type Stars in the Northern Hemisphere
| Autor: | Jenna L. Crowell, Ellen S. Howell, Mary Hinkle, Yanga R. Fernandez, Ronald J. Vervack, Collin Lewin, Christopher Magri, Sean E. Marshall |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Solar System
Spectral shape analysis 010504 meteorology & atmospheric sciences media_common.quotation_subject FOS: Physical sciences Astrophysics 01 natural sciences Spectral line 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics 0105 earth and related environmental sciences media_common Physics Earth and Planetary Astrophysics (astro-ph.EP) Near-infrared spectroscopy Astronomy and Astrophysics Stars Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Asteroid Sky Physics::Space Physics Astrophysics::Earth and Planetary Astrophysics Visible spectrum Astrophysics - Earth and Planetary Astrophysics |
| Popis: | Although solar-analog stars have been studied extensively over the past few decades, most of these studies have focused on visible wavelengths, especially those identifying solar-analog stars to be used as calibration tools for observations. As a result, there is a dearth of well-characterized solar analogs for observations in the near-infrared, a wavelength range important for studying solar system objects. We present 184 stars selected based on solar-like spectral type and V-J and V-K colors whose spectra we have observed in the 0.8-4.2 micron range for calibrating our asteroid observations. Each star has been classified into one of three ranks based on spectral resemblance to vetted solar analogs. Of our set of 184 stars, we report 145 as reliable solar-analog stars, 21 as solar analogs usable after spectral corrections with low-order polynomial fitting, and 18 as unsuitable for use as calibration standards owing to spectral shape, variability, or features at low to medium resolution. We conclude that all but 5 of our candidates are reliable solar analogs in the longer wavelength range from 2.5 to 4.2 microns. The average colors of the stars classified as reliable or usable solar analogs are V-J=1.148, V-H=1.418, and V-K=1.491, with the entire set being distributed fairly uniformly in R.A. across the sky between -27 and +67 degrees in decl. 19 pages, 8 figures, 2 tables |
| Databáze: | OpenAIRE |
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