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    STAR FORMATION RATE AND AGN IN BARRED GALAXIES

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    https://www.riss.kr/link?id=A104662971

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    다국어 초록 (Multilingual Abstract) kakao i 다국어 번역

    We investigate the dependence of star formation rate and Active Galaxy Nuclei (AGN) frequency on the bar properties, especially the bar strength, using SDSS DR6. To better represent the bar strength, we divided the bars into 6 classes according to their length and axial ratios. There seems to be a fairly good correlation between the star formation rate derived from Hα emission lines and the bar strength, whereas there is no apparent correlation between the AGN activity and the bar strength. We interpret that the former correlation is due to the dependence of bar-driven gas inflow on the strength of bar. The lack of correlation between AGN and bar properties suggests that the accretion of gas onto a supermassive black hole(SMBH) is regulated by the interplay between the bar and SMBH. The frequency of AGN seems to be dependent on the background density but the star formation rate does not. It suggests that star formation is a localized phenomenon that is mostly determined by the gas density in a galaxy, while AGN activity is more closely related to the host property such as mass and luminosity that are thought to be dependent on the environment through the density-luminosity relation.
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    We investigate the dependence of star formation rate and Active Galaxy Nuclei (AGN) frequency on the bar properties, especially the bar strength, using SDSS DR6. To better represent the bar strength, we divided the bars into 6 classes according to th...

    We investigate the dependence of star formation rate and Active Galaxy Nuclei (AGN) frequency on the bar properties, especially the bar strength, using SDSS DR6. To better represent the bar strength, we divided the bars into 6 classes according to their length and axial ratios. There seems to be a fairly good correlation between the star formation rate derived from Hα emission lines and the bar strength, whereas there is no apparent correlation between the AGN activity and the bar strength. We interpret that the former correlation is due to the dependence of bar-driven gas inflow on the strength of bar. The lack of correlation between AGN and bar properties suggests that the accretion of gas onto a supermassive black hole(SMBH) is regulated by the interplay between the bar and SMBH. The frequency of AGN seems to be dependent on the background density but the star formation rate does not. It suggests that star formation is a localized phenomenon that is mostly determined by the gas density in a galaxy, while AGN activity is more closely related to the host property such as mass and luminosity that are thought to be dependent on the environment through the density-luminosity relation.

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    참고문헌 (Reference)

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    1 형식, "시이펏 은하 NGC 5728의 OASIS 분광 영상" 한국지구과학회 27 (27): 569-578, 2006

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    4 Ho, L.C, "The Influence of Bars on Nuclear Activity" 487 : 591-602, 1997

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    6 Athanassoula, E., "The Existence and Shapes of Dust Lanes in Galactic Bars" 259 : 345-364, 1992

    7 Buta. R., "The Distribution of Bar and Spiral Arm Strengths in Disk Galaxies" 130 : 506-523, 2005

    8 van den Wel, A., "The Dependence of Galaxy Morphology and Structure on Environment and Stellar Mass" 675 : 13-16, 2008

    9 Ohta, K., "Surface Photometry of Barred Spiral Galaxies" 357 : 71-90, 1990

    10 Ann, H.B, "Surface Photometry of Barred Galaxies: Global Structure of Barred Galaxies" 20 : 49-62, 1987

    11 Kennicutt, R.C.Jr, "Star Formation in Galaxies Along the Hubble Sequence" 36 : 189-231, 1998

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    41 Barazza, F.D., "Bars in Disk-dominated and Bulge-dominated Galaxies at z ~ 0: New Insights from ~3600 SDSS Galaxies" 675 : 1194-1212, 2008

    42 Regan, M.W, "Bar-driven Mass Inflow: How Bar Characteristics Affect the Inflow" 600 : 595-612, 2004

    43 Laurikainen, E., "Bar Strengths and Nuclear Activity" 249 : 183-186, 2001

    44 Martinet, L, "Bar Strength and Star Formation Activity in Late-type Barred Galaxies" 323 : 363-373, 1997

    45 Norman, C.A., "Bar Dissolution and Bulge Formation: An Example of Secular Dynamical Evolution in Galaxies" 462 : 114-124, 1996

    46 Aguerri, J.A.L., "A strong correlation between bar strength and Global Star Forming Activity in Isolated Barred Galaxies" 351 : 43-46, 1999

    47 Pompea, S.M, "A Test of the Association of Infrared Activity with Bars" 356 : 416-429, 1990

    48 Knapen, J.H., "A Subarcsecond Resolution Near-Infrared Study of Seyfert and Normal Galaxies. II. Morphology" 529 : 93-100, 2000

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