UGC 7639: A Dwarf Galaxy in the Canes Venatici I Cloud
Joint Authors
Buson, L. M.
Bettoni, D.
Mazzei, P.
Galletta, G.
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-07-28
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
We want to get insight into the formation mechanism and the evolution of UGC 7639, a dwarf galaxy in the Canes Venatici I Cloud (CVnIC).
We used archival multiwavelength data to constrain its global properties.
Ultraviolet images show that UGC 7639 inner regions are composed mostly by young stellar populations.
In addition, we used smoothed particle hydrodynamics simulations with chemophotometric implementation to account for its formation and evolution.
UGC 7639 is an example of blue dwarf galaxy whose global properties are well matched by our multiwavelength approach, that is, a suitable approach to highlight the evolution also of these galaxies as a class.
We found that the global properties of UGC 7639, namely, its total absolute B-band magnitude, its whole spectral energy distribution, and morphology, are well matched by an encounter with a system four times more massive than our target.
Moreover, the current star formation rate of the simulated dwarf, ≈0.03 M⊙ yr−1, is in good agreement with our UV-based estimate.
We derived a galaxy age of 8.6 Gyr.
Following our simulation, the ongoing star formation will extinguish within 1.6 Gyr, thus leaving a red dwarf galaxy.
American Psychological Association (APA)
Buson, L. M.& Bettoni, D.& Mazzei, P.& Galletta, G.. 2015. UGC 7639: A Dwarf Galaxy in the Canes Venatici I Cloud. Advances in Astronomy،Vol. 2015, no. 2015, pp.1-10.
https://search.emarefa.net/detail/BIM-1051962
Modern Language Association (MLA)
Buson, L. M.…[et al.]. UGC 7639: A Dwarf Galaxy in the Canes Venatici I Cloud. Advances in Astronomy No. 2015 (2015), pp.1-10.
https://search.emarefa.net/detail/BIM-1051962
American Medical Association (AMA)
Buson, L. M.& Bettoni, D.& Mazzei, P.& Galletta, G.. UGC 7639: A Dwarf Galaxy in the Canes Venatici I Cloud. Advances in Astronomy. 2015. Vol. 2015, no. 2015, pp.1-10.
https://search.emarefa.net/detail/BIM-1051962
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1051962