Geometry of Star-Forming Galaxies from SDSS, 3D-HST and CANDELS

التفاصيل البيبلوغرافية
العنوان:	Geometry of Star-Forming Galaxies from SDSS, 3D-HST and CANDELS
المؤلفون:	van der Wel, A., Chang, Yu-Yen, Bell, E. F., Holden, B. P., Ferguson, H. C., Giavalisco, M., Rix, H. -W., Skelton, R., Whitaker, K., Momcheva, I., Brammer, G., Kassin, S. A., Martig, M., Dekel, A., Ceverino, D., Koo, D. C., Mozena, M., van Dokkum, P. G., Franx, M., Faber, S. M., Primack, J.
المصدر:	van der Wel, A. et al. 2014, ApJ, 792, L6
سنة النشر:	2014
المجموعة:	Astrophysics
مصطلحات موضوعية:	Astrophysics - Astrophysics of Galaxies
الوصف:	We determine the intrinsic, 3-dimensional shape distribution of star-forming galaxies at 0 1e10 Msol) disks are the most common geometric shape at all z < 2. Lower-mass galaxies at z>1 possess a broad range of geometric shapes: the fraction of elongated (prolate) galaxies increases toward higher redshifts and lower masses. Galaxies with stellar mass 1e9 Msol (1e10 Msol) are a mix of roughly equal numbers of elongated and disk galaxies at z~1 (z~2). This suggests that galaxies in this mass range do not yet have disks that are sustained over many orbital periods, implying that galaxies with present-day stellar mass comparable to that of the Milky Way typically first formed such sustained stellar disks at redshift z~1.5-2. Combined with constraints on the evolution of the star formation rate density and the distribution of star formation over galaxies with different masses, our findings imply that, averaged over cosmic time, the majority of stars formed in disks. Comment: Published in ApJ Letters
نوع الوثيقة:	Working Paper
DOI:	10.1088/2041-8205/792/1/L6
URL الوصول:	http://arxiv.org/abs/1407.4233
رقم الأكسشن:	edsarx.1407.4233
قاعدة البيانات:	arXiv

الوصف
DOI:	10.1088/2041-8205/792/1/L6