Revision of Stellar Intrinsic Colors in the Infrared by the Spectroscopic Surveys

Abstract

Intrinsic colors of normal stars are derived in the popularly used infrared bands involving the 2MASS/JHKs, WISE, Spitzer/IRAC and AKARI/S9W filters. Based on three spectroscopic surveys -- LAMOST, RAVE and APOGEE, stars are classified into groups of giants and dwarfs, as well as metal-normal and metal-poor stars. An empirical analytical relation of the intrinsic color is obtained with stellar effective temperature (Teff) for each group of stars after the zero-reddening stars are selected from the blue edge in the $J-\lambda$ versus (Teff) diagram. It is found that metallicity has little effect on the infrared colors. In the near-infrared bands, our results agree with previous work. In addition, the color indexes H-W2 and Ks-W1 that are taken as constant to calculate interstellar extinction are discussed. The intrinsic color of M-type stars are derived separately due to lack of accurate measurement of their effective temperature.

43 pages, 13 tables and 11 figures. Accepted for publication in AJ

References in corpus (1)

• The binarity of Milky Way F,G,K stars as a function of effective temperature and metallicity

Cited by in corpus (16)

• A Systematic Study of the dust of Galactic Supernova Remnants I. The Distance and the Extinction
• Distances to the Supernova Remnants in the Inner Disk
• The Sample of Red Supergiants in Twelve Low-Mass Galaxies of the Local Group
• The Ultraviolet Extinction Map and Dust Property at High Galactic Latitude
• The Optical to Infrared Extinction Law of Magellanic Clouds Based on Red Supergiant and Classical Cepheid
• Planetesimals Around Stars with TESS (PAST): I. Transient Dimming of a Binary Solar Analog at the End of the Planet Accretion Era
• The Extinction and Distance of the MBM Molecular Clouds at High Galactic Latitude
• Extinction of Taurus, Orion, Perseus and California Molecular Clouds Based on the LAMOST, 2MASS and Gaia surveys I: Three-dimensional Extinction and Structure
• Infrared Absolute Calibration I: Comparison of Sirius with Fainter Calibration Stars
• DeGaPe 35: Amateur discovery of a new southern symbiotic star
• The Galactic Chemical Evolution of Chlorine
• Data challenges as a tool for time-domain astronomy
• Intrinsic Color Indices of Early-Type Dwarf Stars
• Exploring Be phenomena in OBA stars: a Mid-infrared search
• Detecting hot stars in the Galactic centre with combined near- and mid-infrared photometry
• Distance estimation of the high-velocity cloud Anti-Center Shell