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The Star Formation History and Dust Production in Andromeda IX

Published online by Cambridge University Press:  09 June 2023

Hedieh Abdollahi Open the ORCID record for Hedieh Abdollahi [Opens in a new window] ,
Atefeh Javadi Open the ORCID record for Atefeh Javadi [Opens in a new window] ,
Mohammad Taghi Mirtorabi ,
Elham Saremi ,
Habib Khosroshahi ,
Jacco Th. van Loon ,
Iain McDonald Open the ORCID record for Iain McDonald [Opens in a new window] ,
Elahe Khalouei ,
Sima T. Aghdam Open the ORCID record for Sima T. Aghdam [Opens in a new window]  and
Maryam Saberi Open the ORCID record for Maryam Saberi [Opens in a new window]
Hedieh Abdollahi
Affiliation:
Physics Department, Faculty of Physics and Chemistry, Alzahra University, Vanak, 1993891176, Tehran, Iran email: Abdollahi.hedieh2013@gmail.com
Atefeh Javadi
Affiliation:
School of Astronomy, Institute for Research in Fundamental Sciences (IPM), Tehran, 19568-36613, Iran
Mohammad Taghi Mirtorabi
Affiliation:
Physics Department, Faculty of Physics and Chemistry, Alzahra University, Vanak, 1993891176, Tehran, Iran email: Abdollahi.hedieh2013@gmail.com
Elham Saremi
Affiliation:
School of Astronomy, Institute for Research in Fundamental Sciences (IPM), Tehran, 19568-36613, Iran Instituto de Astrofìsica de Canarias, C/ Vìa Làctea s/n, 38205 La Laguna, Tenerife, Spain Departamento de Astrofìsica, Universidad de La Laguna, 38205 La Laguna, Tenerife, Spain
Habib Khosroshahi
Affiliation:
School of Astronomy, Institute for Research in Fundamental Sciences (IPM), Tehran, 19568-36613, Iran
Jacco Th. van Loon
Affiliation:
Lennard-Jones Laboratories, Keele University, ST5 5BG, UK
Iain McDonald
Affiliation:
Jodrell Bank Centre for Astrophysics, Alan Turing Building, University of Manchester, M13 9PL, UK Department of Physical Sciences, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK
Elahe Khalouei
Affiliation:
School of Astronomy, Institute for Research in Fundamental Sciences (IPM), Tehran, 19568-36613, Iran
Sima T. Aghdam
Affiliation:
School of Astronomy, Institute for Research in Fundamental Sciences (IPM), Tehran, 19568-36613, Iran
Maryam Saberi
Affiliation:
Rosseland Centre for Solar Physics, University of Oslo, P.O. Box 1029, Blindern, NO-0315, Oslo, Norway
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Abstract

Local Group (LG), the nearest and most complete galactic environment, provides valuable information on the formation and evolution of the Universe. Studying galaxies of different sizes, morphologies, and ages can provide this information. For this purpose, we chose the And IX dSph galaxy, which is one of the observational targets of the Isaac Newton Telescope (INT) survey. A total of 50 long-period variables (LPVs) were found in And IX in two filters, Sloan i' and Harris V at a half-light radius of 2.5 arcmin. The And IX’s star formation history (SFH) was constructed with a maximum star formation rate (SFR) of about 0.00082 ± 0.00031 M⊙ yr−1, using LPVs as a tracer. The total mass return rate of LPVs was calculated based on the spectral energy distribution (SED) of about 2.4 × 10−4 M⊙ yr−1. The distance modulus of 24.56−0.15+0.05 mag was estimated based on the tip of the red giant branch (TRGB).

Keywords

stars: AGB and LPVstars: formationstars: mass-lossgalaxies: evolutiongalaxies: star formationgalaxies: individual: And IX
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 17 , Symposium S373: Resolving the Rise and Fall of Star Formation in Galaxies , August 2021 , pp. 242 - 245
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Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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