Results of KVN Key Science Program for evolved stars

Youngjoo Yun; Se Hyung Cho; Dong Hwan Yoon; Haneul Yang; Richard Dodson; María J. Rioja; Hiroshi Imai

doi:10.1017/S174392132300217X

Results of KVN Key Science Program for evolved stars

Youngjoo Yun, Se Hyung Cho, Dong Hwan Yoon, Haneul Yang, Richard Dodson, María J. Rioja, Hiroshi Imai

Research output: Chapter in Book/Conference paper › Conference paper › peer-review

Abstract

We present the results of KVN Key Science Program (KSP) for evolved stars, which was launched in 2014. The first phase of KSP ended in June 2020 and the second phase started in October 2020. The goal of KSP is to study the physical characteristics of the evolved stars by observing the spatial distribution and temporal variability of the stellar masers at four frequency-bands (K, Q, W and D bands). The 22 GHz H2O maser is usually observed from the outer part of circumstellar envelopes compared to the 43, 86, 129 GHz SiO masers, thus the kinematic links between these regions can be studied by the multi-frequency simultaneous observations of KSP along the stellar pulsation cycles. This eventually enable us to study the enormous mass-loss rate of evolved stars, and the accumulated results from KSP are expected to shed light on the study of the late stage of the stellar evolution.

Original language	English
Title of host publication	Cosmic Masers: Proper Motion toward the Next-Generation Large Projects
Editors	Tomoya Hirota, Hiroshi Imai, Karl Menten, Ylva Pihlstrom
Pages	324-327
Number of pages	4
Volume	18
DOIs	https://doi.org/10.1017/S174392132300217X
Publication status	Published - 2024
Event	IAU Symposium 380 : Cosmic Masers: Proper Motion toward the Next-Generation Large Projects - Kagoshima, Japan Duration: 20 Mar 2023 → 24 Mar 2023 https://iaus-maser2023.jp/

Publication series

Name	Proceedings of the International Astronomical Union
Publisher	Cambridge University Press
ISSN (Print)	1743-9213

Conference

Conference	IAU Symposium 380
Country/Territory	Japan
City	Kagoshima
Period	20/03/23 → 24/03/23
Internet address	https://iaus-maser2023.jp/

Access to Document

10.1017/S174392132300217X

Cite this

Yun, Y., Cho, S. H., Yoon, D. H., Yang, H., Dodson, R., Rioja, M. J., & Imai, H. (2024). Results of KVN Key Science Program for evolved stars. In T. Hirota, H. Imai, K. Menten, & Y. Pihlstrom (Eds.), Cosmic Masers: Proper Motion toward the Next-Generation Large Projects (Vol. 18, pp. 324-327). (Proceedings of the International Astronomical Union). https://doi.org/10.1017/S174392132300217X

@inproceedings{62aa799dda3240be8284e13fddd7986a,

title = "Results of KVN Key Science Program for evolved stars",

abstract = "We present the results of KVN Key Science Program (KSP) for evolved stars, which was launched in 2014. The first phase of KSP ended in June 2020 and the second phase started in October 2020. The goal of KSP is to study the physical characteristics of the evolved stars by observing the spatial distribution and temporal variability of the stellar masers at four frequency-bands (K, Q, W and D bands). The 22 GHz H2O maser is usually observed from the outer part of circumstellar envelopes compared to the 43, 86, 129 GHz SiO masers, thus the kinematic links between these regions can be studied by the multi-frequency simultaneous observations of KSP along the stellar pulsation cycles. This eventually enable us to study the enormous mass-loss rate of evolved stars, and the accumulated results from KSP are expected to shed light on the study of the late stage of the stellar evolution.",

keywords = "masers, radiative transfer, stars: AGB and post-AGB, stars: circumstellar matter, stars: mass loss, techniques: interferometric",

author = "Youngjoo Yun and Cho, {Se Hyung} and Yoon, {Dong Hwan} and Haneul Yang and Richard Dodson and Rioja, {Mar{\'i}a J.} and Hiroshi Imai",

note = "Publisher Copyright: {\textcopyright} The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union.; IAU Symposium 380 : Cosmic Masers: Proper Motion toward the Next-Generation Large Projects ; Conference date: 20-03-2023 Through 24-03-2023",

year = "2024",

doi = "10.1017/S174392132300217X",

language = "English",

volume = "18",

series = "Proceedings of the International Astronomical Union",

publisher = "Cambridge University Press",

pages = "324--327",

editor = "Tomoya Hirota and Hiroshi Imai and Karl Menten and Ylva Pihlstrom",

booktitle = "Cosmic Masers: Proper Motion toward the Next-Generation Large Projects",

url = "https://iaus-maser2023.jp/",

}

Yun, Y, Cho, SH, Yoon, DH, Yang, H, Dodson, R , Rioja, MJ & Imai, H 2024, Results of KVN Key Science Program for evolved stars. in T Hirota, H Imai, K Menten & Y Pihlstrom (eds), Cosmic Masers: Proper Motion toward the Next-Generation Large Projects. vol. 18, Proceedings of the International Astronomical Union, pp. 324-327, IAU Symposium 380 , Kagoshima, Japan, 20/03/23. https://doi.org/10.1017/S174392132300217X

Results of KVN Key Science Program for evolved stars. / Yun, Youngjoo; Cho, Se Hyung; Yoon, Dong Hwan et al.
Cosmic Masers: Proper Motion toward the Next-Generation Large Projects. ed. / Tomoya Hirota; Hiroshi Imai; Karl Menten; Ylva Pihlstrom. Vol. 18 2024. p. 324-327 (Proceedings of the International Astronomical Union).

Research output: Chapter in Book/Conference paper › Conference paper › peer-review

TY - GEN

T1 - Results of KVN Key Science Program for evolved stars

AU - Yun, Youngjoo

AU - Cho, Se Hyung

AU - Yoon, Dong Hwan

AU - Yang, Haneul

AU - Dodson, Richard

AU - Rioja, María J.

AU - Imai, Hiroshi

N1 - Publisher Copyright: © The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union.

PY - 2024

Y1 - 2024

N2 - We present the results of KVN Key Science Program (KSP) for evolved stars, which was launched in 2014. The first phase of KSP ended in June 2020 and the second phase started in October 2020. The goal of KSP is to study the physical characteristics of the evolved stars by observing the spatial distribution and temporal variability of the stellar masers at four frequency-bands (K, Q, W and D bands). The 22 GHz H2O maser is usually observed from the outer part of circumstellar envelopes compared to the 43, 86, 129 GHz SiO masers, thus the kinematic links between these regions can be studied by the multi-frequency simultaneous observations of KSP along the stellar pulsation cycles. This eventually enable us to study the enormous mass-loss rate of evolved stars, and the accumulated results from KSP are expected to shed light on the study of the late stage of the stellar evolution.

AB - We present the results of KVN Key Science Program (KSP) for evolved stars, which was launched in 2014. The first phase of KSP ended in June 2020 and the second phase started in October 2020. The goal of KSP is to study the physical characteristics of the evolved stars by observing the spatial distribution and temporal variability of the stellar masers at four frequency-bands (K, Q, W and D bands). The 22 GHz H2O maser is usually observed from the outer part of circumstellar envelopes compared to the 43, 86, 129 GHz SiO masers, thus the kinematic links between these regions can be studied by the multi-frequency simultaneous observations of KSP along the stellar pulsation cycles. This eventually enable us to study the enormous mass-loss rate of evolved stars, and the accumulated results from KSP are expected to shed light on the study of the late stage of the stellar evolution.

KW - masers

KW - radiative transfer

KW - stars: AGB and post-AGB

KW - stars: circumstellar matter

KW - stars: mass loss

KW - techniques: interferometric

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M3 - Conference paper

AN - SCOPUS:85185765869

VL - 18

T3 - Proceedings of the International Astronomical Union

SP - 324

EP - 327

BT - Cosmic Masers: Proper Motion toward the Next-Generation Large Projects

A2 - Hirota, Tomoya

A2 - Imai, Hiroshi

A2 - Menten, Karl

A2 - Pihlstrom, Ylva

T2 - IAU Symposium 380

Y2 - 20 March 2023 through 24 March 2023

ER -

Results of KVN Key Science Program for evolved stars

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