Variability-selected quasars behind the Small Magellanic Cloud

被引：27

作者：

Dobrzycki, A

Macri, LM

Stanek, KZ

Groot, PJ

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[2] Kitt Peak Natl Observ, Natl Opt Astron Observ, Tucson, AZ 85726 USA

[3] Katholieke Univ Nijmegen, Afdeling Sterrenkunde, NL-6500 GL Nijmegen, Netherlands

来源：

ASTRONOMICAL JOURNAL | 2003年 / 125卷 / 03期

关键词：

Magellanic Clouds; quasars : general;

D O I：

10.1086/346144

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present follow-up spectroscopic observations of quasar candidates in the Small Magellanic Cloud selected by L. Eyer from the OGLE database. Of 12 observed objects identified as "QSO candidates, "five are confirmed as quasars, with emission redshifts ranging from 0.28 to 2.16. Two of these quasars were also recently identified independently in the MACHO database by Geha et al. We discuss the prospects of using the variability-based selection technique for quasar searches behind other dense stellar fields. An additional criterion utilizing a color-color diagram should reduce the number of stars in the candidate lists.

引用

页码：1330 / 1335

页数：6

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