Skip to Main content Skip to Navigation
Conference papers

OH/IR stars versus YSOs in infrared photometric surveys

Abstract : AGB stars play a major role in the chemical evolution of the galaxies. It thus is important to establish reliable photometric selection criteria to count them, especially AGB stars at the last stages of AGB evolution like OH/IR stars. Here, we have identified about 1500 OH/IR stars and 500 YSOs with methanol masers, in all major mid- and far-infrared surveys (IRAS, MSX, AKARI, WISE, GLIMPSE, and Hi-Gal). We show that AGB stars with high mass-loss rates cannot be disentagled from YSOs with only mid-infrared photometry; far-infrared photometry is essential. In the region observed by GLIMPSE, we show that the proportion of AGB stars has been severely underestimated in previous works: about 70% of "intrinsically" red objects in GLIMPSE are AGB stars rather than YSOs.
Document type :
Conference papers
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-02993710
Contributor : Mark Allen <>
Submitted on : Friday, November 6, 2020 - 11:53:13 PM
Last modification on : Friday, May 28, 2021 - 5:18:03 PM

Identifiers

Collections

Citation

Cécile Loup, M Allen, Ariane Lançon, Anaïs Oberto. OH/IR stars versus YSOs in infrared photometric surveys. Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time, Aug 2018, Vienna, Austria. pp.454-455, ⟨10.1017/S1743921318007901⟩. ⟨hal-02993710⟩

Share

Metrics

Record views

40