Linear radio size evolution of μJy populations
Linear radio size evolution of μJy populations
复制标题
μJy 种群的线性射电尺寸演化
DOI:
10.1051/0004-6361/201834243
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发表时间:
2018
影响因子:
6.5
通讯作者:
Ciliegi
中科院分区:
文献类型:
--
作者:
Zamorani;Ciliegi
We investigate the linear radio size properties of theμJy populations of radio-selected active galactic nuclei (AGN) and star-forming galaxies (SFGs) using a multi-resolution catalog based on the original VLA-COSMOS 3 GHz 0.″75 resolution mosaic and its convolved images (up to a resolution of 2.″2). The final catalog contains 6399 radio sources above a 3 GHz total flux density ofST> 20μJy (median ⟨ST⟩=37μJy), with redshift information (median ⟨z⟩=1.0), and multi-wavelength classification as SFGs, radio-excess AGN (RX-AGN), or non-radio-excess AGN (NRX-AGN). RX-AGN are those whose radio emission exceeds the star formation rate derived by fitting the global spectral energy distribution. We derive the evolution with redshift and luminosity of the median linear sizes of each class of objects. We find that RX-AGN are compact, with median sizes of ∼1–2 kpc and increasing with redshift, corresponding to an almost constant angular size of 0.″25. NRX-AGN typically have radio sizes a factor of 2 larger than the RX-AGN. The median radio size of SFGs is about 5 kpc up toz∼ 0.7, and it decreases beyond this redshift. Using luminosity-complete subsamples of objects, we separately investigate the effect of redshift and luminosity dependance. We compare the radio sizes of SFGs with those derived in the rest-frame far-infrared (FIR) and UV bands. We find that SFGs have comparable sizes (within 15%) in the radio and rest-frame FIR, while the sizes measured in the UV-band are systematically larger than the radio sizes.
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DOI:
10.3847/0067-0049/224/2/24
发表时间:
2016-04
期刊:
The Astrophysical Journal Supplement Series
影响因子:
--
作者:
C. Laigle;H. McCracken;O. Ilbert;B. Hsieh;I. Davidzon;P. Capak;G. Hasinger;J. Silverman;C. Pi
通讯作者:
C. Laigle;H. McCracken;O. Ilbert;B. Hsieh;I. Davidzon;P. Capak;G. Hasinger;J. Silverman;C. Pi
DOI:
10.1088/0004-637x/750/2/126
发表时间:
2012
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Eric J. Murphy;T. Porter;I. Moskalenko;G. Helou;A. Strong
通讯作者:
A. Strong
影响因子:
4.8
作者:
I. Whittam;J. M. Riley;D. A. Green;M. Davies;Tmo Franzen;C. Rumsey;M. Schammel;E. Waldram
通讯作者:
E. Waldram
影响因子:
6.5
作者:
V. Smolčić;M. Novak;I. Delvecchio;L. Ceraj;M. Bondi;J. Delhaize;S. Marchesi;E. Murphy;E. Schinnerer;E. Vardoulaki;G. Zamorani
通讯作者:
V. Smolčić;M. Novak;I. Delvecchio;L. Ceraj;M. Bondi;J. Delhaize;S. Marchesi;E. Murphy;E. Schinnerer;E. Vardoulaki;G. Zamorani
影响因子:
4.8
作者:
I. Delvecchio;V. Smolčić;G. Zamorani;D. Rosario;M. Bondi;S. Marchesi;T. Miyaji;M. Novak;M. Sargent;D. Alexander;J. Delhaize
通讯作者:
J. Delhaize