Scicluna, P., Kemper, F., McDonald, I., Srinivasan, S., Trejo, A., Wallstom, S. H. J., Wouterloot, J. G. A., Cami, J., Greaves, J. ![]() ![]() ![]() ![]() ![]() |
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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.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Schools > Physics and Astronomy |
ISSN: | 0035-8711 |
Date of First Compliant Deposit: | 18 October 2021 |
Date of Acceptance: | 17 September 2021 |
Last Modified: | 13 May 2023 19:13 |
URI: | https://orca.cardiff.ac.uk/id/eprint/144896 |
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