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Core-Collapse Supernovae in Spiral Galaxy M74 and the Hubble Constant
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  • Core-Collapse Supernovae in Spiral Galaxy M74 and the Hubble Constant
  • Core-Collapse Supernovae in Spiral Galaxy M74 and the Hubble Constant
저자명
Jang. In Sung,Lee. Myung Gyoon
간행물명
천문학회보
권/호정보
2014년|39권 2호|pp.68-68 (1 pages)
발행정보
한국천문학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

M74 is a nearby face-on spiral galaxy that hosts three core-collapse supernovae (SNe) : SN Ic 2002ap, SN II-P 2003gd, and SN II-P 2013ej. Therefore it is an ideal target to investigate the properties of the core-collapse SNe and to improve the calibration of Type II-P SNe as a standardizable candle. However, its distance is not well known. We present a new distance estimate to M74 based on the tip of the red giant branch (TRGB). From the photometry of archival F555W and F814W images taken with the Hubble Space Telescope, we derive the TRGB to be at $ITRGB=26.13{pm}0.02$ and the distance modulus to be $30.04{pm}0.04$ (random) ${pm}0.12$ (systematic) (corresponding to a linear distance, $10.19{pm}0.14{pm}0.56Mpc$). With this result, we calibrate the standardized candle method of SNe II-P. From the absolute magnitude of SN 2003gd corrected for its expansion velocity and reddening, we derive the value of the Hubble constant, $H0=72{pm}6{pm}7km;s-1;Mpc-1$. It is in agreement with the uncertainty with the recent estimates based on the luminosity calibration of Type Ia SNe.