Red supergiant stars in NGC 4449, NGC 5055, and NGC 5457

Sang-Hyun Chun; Young-Jong Sohn; Martin Asplund; Luca Casagrande

doi:10.1017/S1743921317002538

Red supergiant stars in NGC 4449, NGC 5055, and NGC 5457

Sang-Hyun Chun, Young-Jong Sohn, Martin Asplund, Luca Casagrande

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Nearby galaxies are ideal objects for the study of the mechanisms of galaxy formation and evolution, and massive stars in nearby galaxies are useful sources to investigate the structures and formation of the galaxies. It is important to gather the contents of massive stars for a number of galaxies spanning various metallicities. We focus on the red supergiants (RSGs) in nearby galaxies NGC 4449, NGC 5055, and NGC 5457, and the photometric properties of RSGs of three galaxies were investigated using near-infrared (JHK) imaging data obtained from WFCAM UKIRT. The (J - K, K)(0) CMDs are investigated and compared with theoretical isochrones (Figure 1). The majority of RSGs in three galaxies have common age ranges from log(t(yr)) = 6.9 to log(t(yr)) = 7.3, and this indicates that these galaxies have experienced recent star formation within 20 Myr. Spatial correlation of RSGs with H II regions and their colour distribution were also investigated. For NGC 4449 and NGC 5457, the RSGs are spatially correlated with the H II regions, which however is not the case for NGC 5055. We found a similar colour distribution and a constant peak magnitude of M-K = -11.9 for the RSGs in the three galaxies.

Original language	English
Title of host publication	Proceedings IAU Symposium No. 323
Editors	X. Liu, L. Stanghellini, A. Karakas
Place of Publication	Glasgow
Publisher	Cambridge University Press
Pages	392-392
ISBN (Print)	1743-9213
DOIs	https://doi.org/10.1017/S1743921317002538
Publication status	Published - 2017
Event	IAU Symposium 323 - Planetary Nebulae: Multi-Wavelength Probes of Stellar and Galactic Evolution - Beijing, China, China Duration: 1 Jan 2016 → … https://www.cambridge.org/core/journals/proceedings-of-the-international-astronomical-union/issue/96C2A409FD048D741A05E8EF01015B1C

Conference

Conference	IAU Symposium 323 - Planetary Nebulae: Multi-Wavelength Probes of Stellar and Galactic Evolution
Country/Territory	China
Period	1/01/16 → …
Other	October 10-14, 2016
Internet address	https://www.cambridge.org/core/journals/proceedings-of-the-international-astronomical-union/issue/96C2A409FD048D741A05E8EF01015B1C

Access to Document

10.1017/S1743921317002538

Cite this

@inproceedings{a61ab6f77e274c20b87250e5dd3973e5,

title = "Red supergiant stars in NGC 4449, NGC 5055, and NGC 5457",

abstract = "Nearby galaxies are ideal objects for the study of the mechanisms of galaxy formation and evolution, and massive stars in nearby galaxies are useful sources to investigate the structures and formation of the galaxies. It is important to gather the contents of massive stars for a number of galaxies spanning various metallicities. We focus on the red supergiants (RSGs) in nearby galaxies NGC 4449, NGC 5055, and NGC 5457, and the photometric properties of RSGs of three galaxies were investigated using near-infrared (JHK) imaging data obtained from WFCAM UKIRT. The (J - K, K)(0) CMDs are investigated and compared with theoretical isochrones (Figure 1). The majority of RSGs in three galaxies have common age ranges from log(t(yr)) = 6.9 to log(t(yr)) = 7.3, and this indicates that these galaxies have experienced recent star formation within 20 Myr. Spatial correlation of RSGs with H II regions and their colour distribution were also investigated. For NGC 4449 and NGC 5457, the RSGs are spatially correlated with the H II regions, which however is not the case for NGC 5055. We found a similar colour distribution and a constant peak magnitude of M-K = -11.9 for the RSGs in the three galaxies.",

author = "Sang-Hyun Chun and Young-Jong Sohn and Martin Asplund and Luca Casagrande",

year = "2017",

doi = "10.1017/S1743921317002538",

language = "English",

isbn = "1743-9213",

pages = "392--392",

editor = "{X. Liu, L. Stanghellini, A. Karakas}",

booktitle = "Proceedings IAU Symposium No. 323",

publisher = "Cambridge University Press",

address = "United Kingdom",

note = "IAU Symposium 323 - Planetary Nebulae: Multi-Wavelength Probes of Stellar and Galactic Evolution ; Conference date: 01-01-2016",

url = "https://www.cambridge.org/core/journals/proceedings-of-the-international-astronomical-union/issue/96C2A409FD048D741A05E8EF01015B1C",

}

Chun, S-H, Sohn, Y-J, Asplund, M & Casagrande, L 2017, Red supergiant stars in NGC 4449, NGC 5055, and NGC 5457. in XLLSAK (ed.), Proceedings IAU Symposium No. 323. Cambridge University Press, Glasgow, pp. 392-392, IAU Symposium 323 - Planetary Nebulae: Multi-Wavelength Probes of Stellar and Galactic Evolution, China, 1/01/16. https://doi.org/10.1017/S1743921317002538

TY - GEN

T1 - Red supergiant stars in NGC 4449, NGC 5055, and NGC 5457

AU - Chun, Sang-Hyun

AU - Sohn, Young-Jong

AU - Asplund, Martin

AU - Casagrande, Luca

PY - 2017

Y1 - 2017

N2 - Nearby galaxies are ideal objects for the study of the mechanisms of galaxy formation and evolution, and massive stars in nearby galaxies are useful sources to investigate the structures and formation of the galaxies. It is important to gather the contents of massive stars for a number of galaxies spanning various metallicities. We focus on the red supergiants (RSGs) in nearby galaxies NGC 4449, NGC 5055, and NGC 5457, and the photometric properties of RSGs of three galaxies were investigated using near-infrared (JHK) imaging data obtained from WFCAM UKIRT. The (J - K, K)(0) CMDs are investigated and compared with theoretical isochrones (Figure 1). The majority of RSGs in three galaxies have common age ranges from log(t(yr)) = 6.9 to log(t(yr)) = 7.3, and this indicates that these galaxies have experienced recent star formation within 20 Myr. Spatial correlation of RSGs with H II regions and their colour distribution were also investigated. For NGC 4449 and NGC 5457, the RSGs are spatially correlated with the H II regions, which however is not the case for NGC 5055. We found a similar colour distribution and a constant peak magnitude of M-K = -11.9 for the RSGs in the three galaxies.

AB - Nearby galaxies are ideal objects for the study of the mechanisms of galaxy formation and evolution, and massive stars in nearby galaxies are useful sources to investigate the structures and formation of the galaxies. It is important to gather the contents of massive stars for a number of galaxies spanning various metallicities. We focus on the red supergiants (RSGs) in nearby galaxies NGC 4449, NGC 5055, and NGC 5457, and the photometric properties of RSGs of three galaxies were investigated using near-infrared (JHK) imaging data obtained from WFCAM UKIRT. The (J - K, K)(0) CMDs are investigated and compared with theoretical isochrones (Figure 1). The majority of RSGs in three galaxies have common age ranges from log(t(yr)) = 6.9 to log(t(yr)) = 7.3, and this indicates that these galaxies have experienced recent star formation within 20 Myr. Spatial correlation of RSGs with H II regions and their colour distribution were also investigated. For NGC 4449 and NGC 5457, the RSGs are spatially correlated with the H II regions, which however is not the case for NGC 5055. We found a similar colour distribution and a constant peak magnitude of M-K = -11.9 for the RSGs in the three galaxies.

U2 - 10.1017/S1743921317002538

DO - 10.1017/S1743921317002538

M3 - Conference contribution

SN - 1743-9213

SP - 392

EP - 392

BT - Proceedings IAU Symposium No. 323

A2 - null, X. Liu, L. Stanghellini, A. Karakas

PB - Cambridge University Press

CY - Glasgow

T2 - IAU Symposium 323 - Planetary Nebulae: Multi-Wavelength Probes of Stellar and Galactic Evolution

Y2 - 1 January 2016

ER -

Red supergiant stars in NGC 4449, NGC 5055, and NGC 5457

Abstract

Conference

Access to Document

Fingerprint

Cite this