Surface photometric calibration of the infrared Tully-Fisher relation using Cepheid-based distances of galaxies

Masaru Watanabe, Naoki Yasuda, Nobunari Itoh, Takashi Ichikawa, Kenshi Yanagisawa

研究成果: Article査読

6 被引用数 (Scopus)

抄録

Infrared J and H surface photometry are carried out for nearby 12 galaxies whose distances have been accurately measured via Hubble Space Telescope Cepheid observations. Using the total, isophotal, and surface photometric aperture magnitudes, we calibrate the infrared luminosity-line-width relation (IRTF). It is found that IRTF changes its slope at log Wc20 ∼ 2.45 in all the examined magnitude systems. The apparent scatter of IRTF is not significantly reduced when surface photometric magnitudes are used instead of the conventionally used synthetic aperture magnitude H -0.5. It is also shown that the color (I-H)T of the nearby calibrator galaxies is redder by ∼0.2 mag than the Coma Cluster of galaxies, but such a trend is not clearly visible for Ursa Major mostly because of poor statistics. The color offset of the Coma Cluster is analogous to that previously found in IT - H -0.5. From the present calibration of H-band IRTF, we obtain the distance to the Coma Cluster to be m - M = 34.94 ± 0.13 mag, where no account is taken of the I-H color problem. Using the cosmic microwave background rest recession velocity of the Coma Cluster, we obtain H0 = 73 ± 4 km s-1 Mpc-1.

本文言語English
ページ(範囲)215-231
ページ数17
ジャーナルAstrophysical Journal
555
1 PART 1
DOI
出版ステータスPublished - 2001 7 1

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

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