Abstract
The Nearby Evolved Stars Survey (NESS) is a volume-complete sample of ∼850 Galactic evolved stars within 3 kpc at (sub-)mm wavelengths, observed in the CO J = (2-1) and (3-2) rotational lines, and the sub-mm continuum, using the James Clark Maxwell Telescope and Atacama Pathfinder Experiment. NESS consists of five tiers, based on distances and dust-production rate (DPR). We define a new metric for estimating the distances to evolved stars and compare its results to Gaia EDR3. Replicating other studies, the most-evolved, highly enshrouded objects in the Galactic Plane dominate the dust returned by our sources, and we initially estimate a total DPR of 4.7 × 10-5 M⊙ yr-1 from our sample. Our sub-mm fluxes are systematically higher and spectral indices are typically shallower than dust models typically predict. The 450/850 μm spectral indices are consistent with the blackbody Rayleigh-Jeans regime, suggesting a large fraction of evolved stars have unexpectedly large envelopes of cold dust.
Original language | English |
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Pages (from-to) | 1091-1110 |
Number of pages | 20 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 512 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2022 May 1 |
Keywords
- catalogues
- stars: AGB and post-AGB
- stars: mass-loss
- stars: winds, outflows
- surveys
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science