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Paper   IPM / Astronomy / 16127
School of Astronomy
Title:   The Isaac Newton Telescope monitoring survey of Local Group dwarf galaxies. I. Survey overview and first results for Andromeda I
Author(s):
 1 . Elham . Saremi 2 . Atefeh . Javadi 3 . Jacco . Th.van Loon 4 . Habib . Khosroshahi 5 . Alireza . Molaeinezhad 6 . Iain . McDonald 7 . Mojtaba . Raouf 8 . Arash . Danesh 9 . James . R. Bamber 10 . Philip . Short 11 . Lucia . Suárez-Andrés 12 . Rosa . Clavero 13 . Ghassem . Gozaliasl
Status:   Published
Journal: Astrophysical Journal
No.:  2
Vol.:  894
Year:  2020
Supported by:            ipm IPM
Abstract:
An optical monitoring survey in nearby dwarf galaxies was carried out with the 2.5 m Isaac Newton Telescope. Fifty-five dwarf galaxies and four isolated globular clusters in the Local Group were observed with the Wide Field Camera. The main aims of this survey are to identify the most evolved asymptotic giant branch (AGB) stars and red supergiants at the end-point of their evolution based on their pulsational instability, use their distribution over luminosity to reconstruct the star formation history, quantify the dust production and mass loss from modeling the multiwavelength spectral energy distributions (SEDs), and relate this to luminosity and radius variations. In this first of a series of papers, we present the methodology of the variability survey and describe the photometric catalog of the Andromeda I (And I) dwarf galaxy as an example of the survey, and we discuss the identified long period variable (LPV) stars. We detected 5581 stars and identified 59 LPV candidates within two half-light radii of the center of And I. The amplitudes of these candidates range from 0.2 to 3 mag in the i-band. Seventy-five percent of detected sources and 98