UGC 7639: A Dwarf Galaxy in the Canes Venatici I Cloud

المؤلفون المشاركون

Buson, L. M.
Bettoni, D.
Mazzei, P.
Galletta, G.

المصدر

Advances in Astronomy

العدد

المجلد 2015، العدد 2015 (31 ديسمبر/كانون الأول 2015)، ص ص. 1-10، 10ص.

الناشر

Hindawi Publishing Corporation

تاريخ النشر

2015-07-28

دولة النشر

مصر

عدد الصفحات

10

التخصصات الرئيسية

الفلك

الملخص 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.

نمط استشهاد جمعية علماء النفس الأمريكية (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

نمط استشهاد الجمعية الأمريكية للغات الحديثة (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

نمط استشهاد الجمعية الطبية الأمريكية (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

نوع البيانات

مقالات

لغة النص

الإنجليزية

الملاحظات

Includes bibliographical references

رقم السجل

BIM-1051962