SIMBAD references

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 logW^c₂₀∼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 I_T-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.