| タイトル | A possible relationship between metal abundance and luminosity for disk galaxies |
| 著者（英） | Strom, S. E.; Bothun, G. D.; Romanishin, W.; Strom, K. M. |
| 著者所属（英） | Massachusetts Univ.|Harvard-Smithsonian Center for Astrophysics|NASA Goddard Space Flight Center|Kitt Peak National Observatory|California Inst. of Tech. |
| 発行日 | 1984-09-01 |
| 言語 | eng |
| 内容記述 | Near-infrared colors have been measured for a sample of 31 late-type galaxies in the Pegasus I and Pisces clusters; system luminosities in the sample cover the range of M(H) between -19 and -23.5. The color index (J - K) correlates strongly with the absolute H magnitude; lower-luminosity systems have bluer colors. These observations are consistent with the assumption that the mean metal abundance of the old disk population decreases systematically with luminosity. The systematic variation (B - H) with absolute H magnitude reported recently by Tully et al. (1982) derives in part from this proposed systematic change of metallicity with luminosity. However, a relative increase in the number of newly formed stars and/or a systematic smaller age for lower-luminosity disks must still be posited in order to fully explain the observed (B - H), H relation. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 84A49455 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/396205 |
