http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Hidetoshi Sano,TOMOYA AMATSUTSU,TORU KONDO,KEICHIRO NAKAMICHI,MITSUYOSHI YAMAGISHI,DAISUKE ISHIHARA,SHINKI OYABU,HIDEHIRO KANEDA,KENGO TACHIHARA,YASUO FUKUI 한국천문학회 2017 天文學論叢 Vol.32 No.1
We present a comparative study of CO and polycyclic aromatic hydrocarbon (PAH) emission toward a region including the massive star-forming regions of NGC 6334 and NGC 6357. We use the NANTEN $^{12}$CO($J$=1--0) data and the $AKARI$ 9 $\mu$m All-Sky diffuse map in order to evaluate the calibration accuracy of the $AKARI$ data. We confirm that the overall CO distribution shows a good spatial correspondence with the PAH emission, and their intensities exhibit a good power-law correlation with a spatial resolution down to 4$\rq{}$ over the region of 10$^\circ$$\times$10$^\circ$. We also reveal poorer correlation for small scale structures between the two quantities toward NGC 6357, due to strong UV radiation from local sources. Larger scatter in the correlation toward NGC 6357 indicates higher ionization degree and/or PAH excitation than that of NGC 6334.
AKARI OBSERVATIONS OF MASSIVE STAR-FORMING REGIONS INDICATIVE OF LARGE-SCALE CLOUD-CLOUD COLLISIONS
Yasuki Hattori,HIDEHIRO KANEDA,DAISUKE ISHIHARA,MITSUYOSHI YAMAGISHI,TORU KONDO,Hidetoshi Sano 한국천문학회 2017 天文學論叢 Vol.32 No.1
We present our AKARI study of massive star forming regions where a large-scale cloud-cloud collision possibly contributes to massive star formation. Our targets are Spitzer bubbles, which consist of two types of bubbles, closed and broken ones; the latter is a candidate of the objects created by cloud-cloud collisions. We performed mid- and far-infrared surface photometry toward Spitzer bubbles to obtain the relationship between the total infrared luminosity, $L_{\rm{IR}}$, and the bubble radius, $R$. As a result, we find that $L_{\rm{IR}}$ is roughly proportional to ${R}^\beta$ where ${\beta}=2.1{\pm}0.4$. Broken bubbles tend to have larger radii than closed bubbles for the same $L_{\rm{IR}}$.
MODELING OF THE ZODIACAL LIGHT FOR THE AKARI MID-IR ALL-SKY DIFFUSE MAPS
TORU KONDO,DAISUKE ISHIHARA,HIDEHIRO KANEDA,SHINKI OYABU,TOMOYA AMATSUTSU,KEICHIRO NAKAMICHI,Hidetoshi Sano,TAKAFUMI OOTSUBO,TAKASHI ONAKA 한국천문학회 2017 天文學論叢 Vol.32 No.1
The AKARI 9 and 18 $\mu$m diffuse maps reveal the all-sky distribution of the interstellar medium with relatively high spatial resolution of $\sim$6$''$. The zodiacal light is a dominant foreground component in the mid-infrared. Thus, removal of the zodiacal light is a critical issue to study low surface brightness Galactic diffuse emission. We carried out modeling of the zodiacal light based on the Kelsall model which is constructed from the COBE data. In the previous study, only a time-varying component of the zodiacal light brightness was used for determination of the model parameters. However, there remains a residual component of the zodiacal light around the ecliptic plane even after removal with the model. Therefore, instead of using a time-varying component, we use the absolute brightness of the zodiacal light and we find that the new model can better remove the residual component. As a result, the best-fit model parameters are changed from those in the previous study. We discuss the properties of the zodiacal light based on our new result.
A SOURCE EXTRACTION METHOD FOR THE AKARI MID-IR FAINT SOURCE CATALOGUE
KEICHIRO NAKAMICHI,DAISUKE ISHIHARA,HIDEHIRO KANEDA,SHINKI OYABU,TORU KONDO,TOMOYA AMATSUTSU,Hidetoshi Sano,TAKASHI ONAKA 한국천문학회 2017 天文學論叢 Vol.32 No.1
We plan to produce a faint source catalogue from the AKARI mid-infrared (IR) all-sky diffuse maps. In the publicly-available AKARI mid-IR point source catalogue (PSC), sources were extracted from single-scan images, and confirmed by using the other scan images. By stacking multiple scan images, we can detect fainter sources which are not listed in the PSC. We optimized the source extraction process using a $6^{\circ}\times6^{\circ}$ area around the star-forming region, Cepheus B. Then, we divided the all-sky data into three seasonal images, and checked the positions and the fluxes of the detected sources on the images. As a result, our new source extraction method works well; 90\% of the sources are also identified in the WISE catalogue. In this method, we obtain the detection limit twice deeper than that of the PSC. The number of sources increases by a factor of 2, as compared with the PSC.
THE CURRENT STATUS OF THE AKARI MID-INFRARED ALL-SKY DIFFUSE MAPS
TOMOYA AMATSUTSU,DAISUKE ISHIHARA,TORU KONDO,HIDEHIRO KANEDA,SHINKI OYABU,MITSUYOSHI YAMAGISHI,KEICHIRO NAKAMICHI,Hidetoshi Sano,TAKASHI ONAKA 한국천문학회 2017 天文學論叢 Vol.32 No.1
We are creating all-sky diffuse maps from the AKARI mid-infrared survey datawith the two photometric bands centered at wavelengths of 9 and 18~$\micron$. The AKARI mid-infrared diffuse maps achieve higher spatial resolution and higher sensitivitythan the IRAS maps. In particular, the 9~$\micron$ data are unique resources as anall-sky tracer of the emission of polycyclic aromatic hydrocarbons (PAHs). However, the original data suffer many artifacts. Thus, we have been developing correction methods. Among them, we have recently improvedcorrection methods for the non-linearity and the reset anomaly of the detector response. These corrections successfully reduce the artifact level down to 0.1\,MJy sr$^{-1}$ on average,% reduce the intensity error from a $\sim 0.2 \ \mjysr$ level down to $\sim 0.1 \ \mjysr$,which is essential for discussion onfaint extended emission (e.g., the Galactic PAH emission). We have also made progress in the subtraction of the scattered lightcaused in the camera optics. We plan to release the improved diffuse maps to the public within a year.