The nearby evolved stars survey - I. JCMT/SCUBA-2 submillimetre detection of the detached shell of U Antliae

被引：5

作者：

Dharmawardena, Thavisha E. ^{[1
,2
]}

Kemper, Francisca ^{[1
,3
]}

Srinivasan, Sundar ^{[1
,4
]}

Scicluna, Peter ^{[1
]}

Marshall, Jonathan P. ^{[1
]}

Wouterloot, Jan G. A. ^{[5
]}

Greaves, Jane ^{[6
]}

Goldman, Steven R. ^{[7
]}

van Loon, Jacco Th. ^{[8
]}

Matsuura, Mikako ^{[6
]}

McDonald, Iain ^{[9
]}

He, Jinhua ^{[10
,11
,12
]}

Zijlstra, Albert A. ^{[13
]}

Toala, Jesus A. ^{[4
]}

Wallstrom, Sofia H. J. ^{[1
,14
]}

Kim, Hyosun ^{[15
]}

Trejo, Alfonso ^{[1
]}

Ventura, Paolo ^{[16
]}

Lagadec, Eric ^{[17
]}

Boyer, Martha L. ^{[7
]}

Liu, Tie ^{[15
]}

Rau, Gioia ^{[18
,19
,20
]}

Izumiura, Hideyuki ^{[21
]}

Cami, Jan ^{[22
,23
,24
]}

Holland, Wayne ^{[25
]}

Jones, Olivia ^{[25
]}

Shinnaga, Hiroko ^{[26
]}

机构：

[1] Acad Sinica Inst Astron & Astrophys, 11F ASNTU Astron Math Bldg, Taipei 10617, Taiwan

[2] Natl Cent Univ, Grad Inst Astron, 300 Zhongda Rd, Taoyuan 32001, Taiwan

[3] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Munich, Germany

[4] Univ Nacl Autonoma Mexico, Inst Radioastron & Astrofis, Antigua Carretera Patzcuaro 8701, Mexico City 58089, DF, Mexico

[5] East Asian Observ, 660 N Aohoku Pl, Hilo, HI 96720 USA

[6] Cardiff Univ, Sch Phys & Astron, 4 Parade, Cardiff CF24 3AA, S Glam, Wales

[7] STScI, 3700 San Martin Dr, Baltimore, MD 21218 USA

[8] Keele Univ, Lennard Jones Labs, Keele ST5 5BG, Staffs, England

[9] Univ Manchester, Jodrell Bank Ctr Astrophys, Alan Turing Bldg, Manchester M13 9PL, Lancs, England

[10] Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects Yunnan, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China

[11] Chinese Acad Sci, South Amer Ctr Astron, China Chile Joint Ctr Astron, Camino El Observatorio 1515, Santiago, Chile

[12] Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile

[13] Univ Hong Kong, Lab Space Res, Pokfulam Rd, Hong Kong, Peoples R China

[14] Katholieke Univ Leuven, Inst Astron, Celestijnenlaan 200D Bus 2401, B-3001 Leuven, Belgium

[15] Korea Astron & Space Sci Inst, 776 Daedukdae Ro, Daejeon 34055, South Korea

[16] INAF, Osservatorio Astron Roma, Via Frascati 33, I-00077 Rome, Italy

[17] Univ Cote Azur, Observ Cote dAzur, CNRS, Lagrange, France

[18] NASA GSFC, Goddard Space Flight Ctr, Code 667, Greenbelt, MD 20071 USA

[19] Catholic Univ Amer, CRESST II, Washington, DC 20064 USA

[20] Catholic Univ Amer, Dept Phys, Washington, DC 20064 USA

[21] NAOJ, NINS 3037 5 Honjo, Okayama Branch Off, Subaru Telescope, Asakuchi, Okayama 7190232, Japan

[22] Univ Western Ontario, Dept Phys, London, ON N6A 3K7, Canada

[23] Univ Western Ontario, Ctr Planetary Sci & Explorat CPSX, London, ON N6A 3K7, Canada

[24] SETI Inst, 189 Bernardo Ave,Suite 100, Mountain View, CA 94043 USA

[25] UK Astron Technol Ctr, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland

[26] Kagoshima Univ, Dept Phys & Astron, Grad Sch Sci & Engn, Kagoshima 8900065, Japan

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2019年 / 489卷 / 03期

基金：

英国科学技术设施理事会;

关键词：

stars: AGB and post-AGB; circumstellar matter; stars: individual: U Ant; stars: mass-loss;

D O I：

10.1093/mnras/stz2334

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the highest resolution single-dish submillimetre observations of the detached shell source U Antliae to date. The observations were obtained at 450 and 850 mu m with SCUBA-2 instrument on the James Clerk Maxwell Telescope as part of the Nearby Evolved Stars Survey. The emission at 850 mu m peaks at 40 arcsec with hints of a second peak seen at similar to 20 arcsec. The emission can be traced out to a radius of 56 arcsec at a 3s level. The outer peak observed at 850 mu m aligns well with the peak observed at Herschel/PACS wavelengths. With the help of spectral energy distribution fitting and radiative transfer calculations of multiple-shell models for the circumstellar envelope, we explore the various shell structures and the variation of grain sizes along the in the circumstellar envelope. We determine a total shell dust mass of (2.0 +/- 0.3) X 10(-5) M-circle dot and established that the thermal pulse that gave rise to the detached shell occurred 3500 +/- 500 yr ago.

引用

页码：3218 / 3231

页数：14

共 11 条

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