nearby galaxies at fir/submm wavelengthshome.kias.re.kr/mkg/upload/ssg gonjiam/s2_2_jclee.pdf ·...
TRANSCRIPT
![Page 1: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/1.jpg)
Nearby galaxies at FIR/submm wavelengths
Survey Science Group Workshop
2016.12.15.
Jong Chul LeeKorea Astronomy and Space Science Institute (KASI)
Ho Seong HwangKorea Institute for Advanced Study (KIAS)
![Page 2: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/2.jpg)
Introduction
Two modes of star formation (Daddi+10) SF sequence evolution (Karim+11)
![Page 3: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/3.jpg)
Introduction
Gas-rich major merger simulation (Narayanan+10)
• Dust Obscured Galaxies (DOGs):high-z dusty star-forming galaxies,selected with R-[24] > 14 (Dey+08)
• Hot DOGs:most luminous galaxies in the universe,containing AGN (Assef+15)
![Page 4: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/4.jpg)
Search for local analog of DOGsUsing GALEX/SDSS/WISE
→ 47 local (z=0.05~0.08) DOGs with S12/S0.22 > 892
Hwang+13
![Page 5: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/5.jpg)
CSO 350 micron continuum observation
![Page 6: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/6.jpg)
SED fit to derive dust properties
Two-component dust modelcold dust: ambient diffuse interstellar medium
warm dust: embedded stellar birth clouds
assuming modified blackbody functions with emissivity index β=2
dust opacity coefficient kν=0.383 cm2 g-1
![Page 7: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/7.jpg)
Comparison with normal galaxies
The dust mass and temperature of local DOGs are not significantly different (<2σ).
![Page 8: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/8.jpg)
Future work
We suspect that the extreme dust obscuration in DOGs is mainly related with a dust geometry (compact/clumpy) rather than an amount of dust.
To achieve a kpc scale spatial resolution of dust map
• Spitzer 24 micron & Herschel 70 micron archival images for z<0.01 galaxies• ALMA proposal
• MaNGA IFU survey data: ~200 IR-bright galaxies in EDR at z<0.03E(B-V)gas from Hα/Hβ vs. E(B-V)star from SSP modelling
We want to know how DOGs are different with other galaxies in terms of the star formation efficiency, gas-to-dust ratio, and gas fraction by obtaining their CO line data such as our own JCMT observation (16A), large programs JINGLE & MALATANG, and…
![Page 9: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/9.jpg)
JINGLE (Shanghai 16.10.17-18)
![Page 10: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/10.jpg)
JINGLE (Shanghai 16.10.17-18)
![Page 11: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/11.jpg)
JINGLE (Shanghai 16.10.17-18)
![Page 12: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/12.jpg)
MALATANG (Nanjing 16.10.19-21)
HCN & HCO+ (4-3) line observation of 23 nearest, strongest star-forming galaxies
![Page 13: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/13.jpg)
MALATANG (Nanjing 16.10.19-21)
![Page 14: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/14.jpg)
MALATANG (Nanjing 16.10.19-21)
![Page 15: Nearby galaxies at FIR/submm wavelengthshome.kias.re.kr/MKG/upload/SSG gonjiam/S2_2_jclee.pdf · 2016-12-22 · Comparison with normal galaxies The dust mass and temperature of local](https://reader034.vdocuments.net/reader034/viewer/2022042306/5ed224325e0ec842bd7898ab/html5/thumbnails/15.jpg)
Korean activity for JCMT/MALATANGY. Gao (China), Z. Zhang (UK), T. R. Greve (UK)
한국천문학계의 JCMT JINGLE/MALATANG survey data 활용연구활성화방안은?