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Multi-transition study of the peculiar merger Arp 299
Jiao, Qian1,2,3; Zhu, Ming1,2
2017-08-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume17Issue:8Pages:12
Corresponding AuthorZhu, Ming(mz@bao.ac.cn)
AbstractWe present a multi-transition study to investigate the physical properties of dust and molecular gas in the archetypical merger Arp 299 by using data including James Clerk Maxwell Telescope (JCMT) 850 and 450 pm observations, Herschel 500, 350, 250, 160 and 70 p.m continuum maps, as well as the CO(3-2), CO(4-3) low-J CO lines and CO(11-10), CO(13-12), CO(14-13) high-J CO lines. The CO(3-2) and CO(4-3) lines are observed by JCMT, and the CO(11-10), CO(13-12), CO(14-13) lines are available on the Herschel Science Archive. The resolution of the Herschel Spectral and Photometric Imaging Receiver (SPIRE) Fourier transform spectrometer (FTS) CO(11-10) data is similar to that of the JCMT CO(3-2) line, while the resolution of the SPIRE/FTS CO(13-12) and Photodetector Array Camera and Spectrometer (PACS) CO(14-13) data is similar to that of JCMT CO(4-3), allowing us to obtain accurate line ratios of ICO(11-10)/ICO(3-2), ICO(13-12)/ICO(4-3) and ICO(14-13)/ICO(4-3). By modeling the spectral energy distribution of the continuum data, we conclude that two components (cold and wann) exist in the dust, with the warm component occupying a small percent of the total dust mass. We further use a radiative transfer analysis code, RADEX, to calculate the density, temperature and column density of warm gas in the central region, which shows that the kinetic temperature T-kin, is in the range 110 to 150 K and hydrogen density n(H-2) is in the range 10(4.7) -10(5.5) cm(-3). We show that the hot dust is located in the central region of IC 694 with a radius of similar to 4" and estimate that the wann gas mass is in the range 3.8 x 10(7) M-circle dot to 7.7 x 10(7) M-circle dot, which contains 5.0%-15.0% of the total mass for the region of IC 694. We also calculate the star formation rate of the galaxy in particular, which is much higher than that of the Milky Way.
Keywordgalaxies: merge galaxies: Arp 299 galaxies: dust galaxies: molecular gas galaxies: wann center
DOI10.1088/1674-4527/17/8/77
WOS KeywordBRIGHT GALAXY SAMPLE ; STAR-FORMATION ; MOLECULAR GAS ; INTENSITY RATIOS ; ARP-299 ; SYSTEM ; CALIBRATION ; STARBURST ; DUST ; CO
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000416068900001
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22068
Collection中国科学院紫金山天文台
Corresponding AuthorZhu, Ming
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Beijing 100012, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Jiao, Qian,Zhu, Ming. Multi-transition study of the peculiar merger Arp 299[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2017,17(8):12.
APA Jiao, Qian,&Zhu, Ming.(2017).Multi-transition study of the peculiar merger Arp 299.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,17(8),12.
MLA Jiao, Qian,et al."Multi-transition study of the peculiar merger Arp 299".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 17.8(2017):12.
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