학술논문
The Nearby Evolved Stars Survey II: Constructing a volume-limited sample and first results from the James Clerk Maxwell Telescope
Document Type
Working Paper
Author
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.
Source
Subject
Language
Abstract
The Nearby Evolved Stars Survey (NESS) is a volume-complete sample of $\sim$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 \emph{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 $4.7\times 10^{-5}$ M$_\odot$ 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.
Comment: 20 pages, 13 figures, 5 tables, accepted for publications in MNRAS
Comment: 20 pages, 13 figures, 5 tables, accepted for publications in MNRAS