The Hubble Space Telescope Key Project on the Extragalactic Distance Scale .6. The Cepheids in NGC 925

被引：92

作者：

Silbermann, NA

Harding, P

Madore, BF

Kennicutt, RC

Saha, A

Stetson, PB

Freedman, WL

Mould, JR

Graham, JA

Hill, RJ

Turner, A

Bresolin, F

Ferrarese, L

Ford, H

Hoessel, JG

Han, MS

Huchra, J

Hughes, SMG

Illingworth, GD

Phelps, R

Sakai, S

机构：

[1] UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721

[2] CALTECH,NASA,EXTRAGALACT DATABASE,INFRARED PROC & ANAL CTR,PASADENA,CA 91125

[3] SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218

[4] DOMINION ASTROPHYS OBSERV,VICTORIA,BC V8X 4M6,CANADA

[5] CARNEGIE INST WASHINGTON OBSERV,PASADENA,CA 91101

[6] AUSTRALIAN NATL UNIV,MT STROMLO & SIDING SPRING OBSERV,INST ADV STUDIES,WESTON,ACT 2611,AUSTRALIA

[7] CARNEGIE INST WASHINGTON,DEPT TERR MAGNETISM,WASHINGTON,DC 20015

[8] NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771

[9] JOHNS HOPKINS UNIV,BALTIMORE,MD 21218

[10] UNIV WISCONSIN,MADISON,WI 53706

[11] HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138

[12] ROYAL GREENWICH OBSERV,CAMBRIDGE CB3 0EZ,ENGLAND

[13] UNIV CALIF SANTA CRUZ,LICK OBSERV,SANTA CRUZ,CA 95064

来源：

ASTROPHYSICAL JOURNAL | 1996年 / 470卷 / 01期

关键词：

Cepheids; distance scale; galaxies; individual; (NGC; 925);

D O I：

10.1086/177845

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the detection of Cepheid variable stars in the barred spiral galaxy NGC 925, using the Hubble Space Telescope (HST) Wide-Field and Planetary Camera 2 (WFPC2). Twelve V (F555W) and four I (F814W) epochs of cosmic-ray split observations were obtained. Eighty Cepheids were discovered, with periods from 6 to similar to 80 days. Light curves of the Cepheids are presented, and their corresponding period-luminosity diagrams are discussed. Using a distance modulus for the Large Magellanic Cloud Cepheids of 18.50 mag and an extinction of E(V-I)=0.13 mag, the measured distance modulus to NGC 925 is 29.84+/-0.16 mag, corresponding to a distance of 9.29+/-0.69 Mpc. A mean reddening of E(V-I)=0.17 mag is found for the Cepheids in this region of NGC 925.

引用

页码：1 / &

页数：38

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