PHANGS-JWST First Results: Massive Young Star Clusters and New Insights from JWST Observations of NGC 1365

被引：29

作者：

Whitmore, Bradley C. ^{[1
]}

Chandar, Rupali ^{[2
]}

Rodriguez, M. Jimena ^{[3
,4
]}

Lee, Janice C. ^{[5
]}

Emsellem, Eric ^{[6
]}

Floyd, Matthew ^{[2
]}

Kim, Hwihyun ^{[5
]}

Kruijssen, J. M. Diederik ^{[7
]}

Mok, Angus ^{[8
]}

Sormani, Mattia C. ^{[9
]}

Boquien, Mederic ^{[10
]}

Dale, Daniel A. ^{[11
]}

Faesi, Christopher M. ^{[12
]}

Henny, Kiana F. ^{[11
]}

Hannon, Stephen ^{[13
]}

Thilker, David A. ^{[14
]}

White, Richard L. ^{[1
]}

Barnes, Ashley T. ^{[15
]}

Bigiel, F. ^{[15
]}

Chevance, Melanie ^{[7
,16
]}

Henshaw, Jonathan D. ^{[17
,18
]}

Klessen, Ralf S. ^{[16
,19
]}

Leroy, Adam K. ^{[20
]}

Liu, Daizhong ^{[21
]}

Maschmann, Daniel ^{[3
,22
]}

Meidt, Sharon E. ^{[23
]}

Rosolowsky, Erik ^{[24
]}

Schinnerer, Eva ^{[18
]}

Sun, Jiayi ^{[25
,26
]}

Watkins, Elizabeth J. ^{[9
]}

Williams, Thomas G. ^{[18
]}

机构：

[1] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

[2] Univ Toledo, Ritter Astrophys Res Ctr, Toledo, OH 43606 USA

[3] Univ Arizona, Steward Observ, 933 N Cherry Ave, Tucson, AZ 85721 USA

[4] UNLP, Inst Astrofis Plata, CONICET, Paseo Bosque S-N,B1900FWA, La Plata, Argentina

[5] NSF NOIRLab, Gemini Observ, 950 N Cherry Ave, Tucson, AZ 85719 USA

[6] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany

[7] Cosm Origins Life COOL Res DAO Coolres Io, Heidelberg, Germany

[8] OCAD Univ, Toronto, ON M5T 1W1, Canada

[9] Heidelberg Univ, Astron Rechen Inst, Zentrum Astron, Monchhofstr 12-14, D-69120 Heidelberg, Germany

[10] Univ Antofagasta, Ctr Astron CITEVA, Ave Angamos 601, Antofagasta, Chile

[11] Univ Wyoming, Dept Phys & Astron, Laramie, WY 82071 USA

[12] Univ Connecticut, Dept Phys, 196A Auditorium Rd,Unit 3046, Storrs, CT 06269 USA

[13] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA

[14] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[15] Univ Bonn, Argelander Inst Astron, Hugel 71, D-53121 Bonn, Germany

[16] Heidelberg Univ, Inst Theoret Astrophys, Zentrum Astron, Albert Ueberle Str 2, D-69120 Heidelberg, Germany

[17] Liverpool John Moores Univ, Astrophys Res Inst, 146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England

[18] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[19] Heidelberg Univ, Interdisziplinares Zentrum Wissensch Rechnen, Neuenheimer Feld 205, D-69120 Heidelberg, Germany

[20] Ohio State Univ, Dept Astron, 140 West 18th Ave, Columbus, OH 43210 USA

[21] Max Planck Inst Extraterr Phys MPE, Giessenbachstr 1, D-85748 Garching, Germany

[22] PSL Univ, Sorbonne Univ, LERMA, Observ Paris, F-75014 Paris, France

[23] Univ Ghent, Sterrenkundig Observ, Krijgslaan 281 S9, B-9000 Ghent, Belgium

[24] Univ Alberta, Dept Phys, Edmonton, AB T6G 2E1, Canada

[25] Univ Toronto, Canadian Inst Theoret Astrophys CITA, 60 St George St, Toronto, ON M5S 3H8, Canada

[26] McMaster Univ, Dept Phys & Astron, 1280 Main St West, Hamilton, ON L8S 4M1, Canada

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2023年 / 944卷 / 02期

基金：

欧洲研究理事会;

关键词：

HIGH ANGULAR RESOLUTION; GLOBULAR-CLUSTERS; ANTENNAE GALAXIES; MOLECULAR GAS; EVOLUTION; EMISSION; REGION; CAMERA; SIMULATIONS; DESTRUCTION;

D O I：

10.3847/2041-8213/acae94

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A primary new capability of JWST is the ability to penetrate the dust in star-forming galaxies to identify and study the properties of young star clusters that remain embedded in dust and gas. In this Letter we combine new infrared images taken with JWST with our optical Hubble Space Telescope (HST) images of the starbursting barred (Seyfert2) spiral galaxy NGC 1365. We find that this galaxy has the richest population of massive young clusters of any known galaxy within 30 Mpc, with similar to 30 star clusters that are more massive than 10(6) M (circle dot) and younger than 10 Myr. Sixteen of these clusters are newly discovered from our JWST observations. An examination of the optical images reveals that 4 of 30 (similar to 13%) are so deeply embedded that they cannot be seen in the Hubble I band (A ( V ) greater than or similar to 10 mag), and that 11 of 30 (similar to 37%) are missing in the HST B band, so age and mass estimates from optical measurements alone are challenging. These numbers suggest that massive clusters in NGC 1365 remain completely obscured in the visible for similar to 1.3 +/- 0.7 Myr and are either completely or partially obscured for similar to 3.7 +/- 1.1 Myr. We also use the JWST observations to gain new insights into the triggering of star cluster formation by the collision of gas and dust streamers with gas and dust in the bar. The JWST images reveal previously unknown structures (e.g., bridges and overshoot regions from stars that form in the bar) that help us better understand the orbital dynamics of barred galaxies and associated star-forming rings. Finally, we note that the excellent spatial resolution of the NIRCAM F200W filter provides a better way to separate barely resolved compact clusters from individual stars based on their sizes.

引用

页数：13

共 41 条

[41] JWST Imaging of the Closest Globular Clusters. II. Discovery of Brown Dwarfs in NGC 6397 and Measurement of Age from the Brown Dwarf Cooling Sequence, Using SANDee-A New Grid of Model Isochrones across the Hydrogen-burning Limit
Gerasimov, Roman
Bedin, Luigi R.
Burgasser, Adam J.
Apai, Daniel
Nardiello, Domenico
Alvarado III, Efrain
Anderson, Jay
ASTROPHYSICAL JOURNAL, 2024, 971 (01):

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