The Nearby Evolved Stars Survey II: Constructing a volume-limited sample and first results from the James Clerk Maxwell Telescope

The Nearby Evolved Stars Survey II: Constructing a volume-limited sample and first results from the James Clerk Maxwell Telescope

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 Experimen...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 2022-04, Vol.512 (1), p.1091-1110
Hauptverfasser: Scicluna, P, Kemper, F, McDonald, I, Srinivasan, S, Trejo, A, Wallström, S H J, Wouterloot, J G A, Cami, J, Greaves, J, He, Jinhua, Hoai, D T, Kim, Hyosun, Jones, O C, Shinnaga, H, Clark, C J R, Dharmawardena, T, Holland, W, Imai, H, van Loon, J Th, Menten, K M, Wesson, R, Chawner, H, Feng, S, Goldman, S, Liu, F C, MacIsaac, H, Tang, J, Zeegers, S, Amada, K, Antoniou, V, Bemis, A, Boyer, M L, Chapman, S, Chen, X, Cho, S-H, Cui, L, Dell’Agli, F, Friberg, P, Fukaya, S, Gomez, H, Gong, Y, Hadjara, M, Haswell, C, Hirano, N, Hony, S, Izumiura, H, Jeste, M, Jiang, X, Kaminski, T, Keaveney, N, Kim, J, Kraemer, K E, Kuan, Y-J, Lagadec, E, Lee, C F, Li, D, Liu, S-Y, Liu, T, de Looze, I, Lykou, F, Maraston, C, Marshall, J P, Matsuura, M, Min, C, Otsuka, M, Oyadomari, M, Parsons, H, Patel, N A, Peeters, E, Pham, T A, Qiu, J, Randall, S, Rau, G, Redman, M P, Richards, A M S, Serjeant, S, Shi, C, Sloan, G C, Smith, M W L, Suh, K-W, Toalá, J A, Uttenthaler, S, Ventura, P, Wang, B, Yamamura, I, Yang, T, Yun, Y, Zhang, F, Zhang, Y, Zhao, G, Zhu, M, Zijlstra, A A
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Sprache:eng
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Zusammenfassung: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 $\mu$m spectral indices are consistent with the blackbody Rayleigh–Jeans regime, suggesting a large fraction of evolved stars have unexpectedly large envelopes of cold dust.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stab2860