Iranian Journal of Astronomy and Astrophysics (IJAA) peer reviewed international Journal devoted to the publication of original research papers from various field of astronomy and astrophysics. IJAA publishes quality original research papers, comprehensive review articles, short papers in astronomy and astrophysics and its applications in the broadest sense. It aims to disseminate knowledge; provide a learned reference in the field; and establish channels of communication between academic and research experts. Papers should contain results of original research not previously published nor under consideration for publication elsewhere. Papers presented at conference which, are only abstracted in the conference proceeding are also welcomed. All papers are refereed. There are no page charges except color figures. Contribution is open to researchers of all nationalities. Frequency: Two issues in a year. All articles indexed and abstracted in (ISC) http://www.isc.gov.ir/ from the first volume.