中文
相关论文

相关论文: Mid-Infrared Spectra of High Redshift (z>2) Radio …

200 篇论文

We report spectroscopic redshifts for 18 microJy-radio galaxies at mean redshift of z=2.2 that are faint at both submmillimeter (submm) and optical wavelengths. While the radio fluxes of these galaxies could indicate far-infrared (far-IR)…

天体物理学 · 物理学 2009-11-10 S. C. Chapman , Ian Smail , A. W. Blain , R. J. Ivison

We want to study the mid-infrared properties and the starburst and AGN contributions, of 24um sources at z~2, through analysis of mid-infrared spectra combined with millimeter, radio, and infrared photometry. Mid-infrared spectroscopy…

We present mid-infrared observations of 18 sources from a sample of 21 z~2 radio-intermediate obscured quasars. The mid-infrared spectra of the sources are continuum dominated, and 12 sources show deep silicate absorption with tau_9.7~1-2.…

天体物理学 · 物理学 2009-11-13 Alejo Martinez-Sansigre , Mark Lacy , Anna Sajina , Steve Rawlings

Infrared-faint radio sources (IFRSs) are a rare class of object which are relatively bright at radio wavelengths but very faint at infrared and optical wavelengths. Here we present sensitive near-infrared observations of a sample of these…

The radio counterparts to the IRAS Redshift Survey galaxies are identified in the NRAO VLA Sky Survey (NVSS) catalog. Our new catalog of the infrared flux-limited (S60 >= 2 Jy) complete sample of 1809 galaxies lists accurate radio…

天体物理学 · 物理学 2009-09-25 Min S. Yun , Naveen A. Reddy , J. J. Condon

Most radio galaxies are hosted by giant gas-poor ellipticals, but some contain significant amounts of dust, which is likely to be of external origin. In order to characterize the mid-IR properties of two of the most nearby and brightest…

星系天体物理 · 物理学 2016-07-06 B. Duah Asabere , C. Horellou , T. Jarrett , H. Winkler

We present deep 350- and 1200-micron imaging of the region around 4C41.17 -- one of the most distant (z = 3.792) and luminous known radio galaxies -- obtained with the Submillimeter High Angular Resolution Camera (SHARC-II) and the Max…

天体物理学 · 物理学 2009-11-13 T. R. Greve , D. Stern , R. J. Ivison , C. De Breuck , A. Kovács , F. Bertoldi

We present an analysis of deep mid- to far-infrared (MFIR) Spitzer photometric observations of the southern 2Jy sample of powerful radio sources (0.05 < z < 0.7), conducting a statistical investigation of the links between radio jet, AGN,…

天体物理学 · 物理学 2011-02-11 D. Dicken , C. Tadhunter , D. Axon , R. Morganti , K. J. Inskip , J. Holt , R. Gonzalez Delgado , B. Groves

Using the Spitzer Space Telescope, we have obtained 3.6--24 micron photometry of 38 radio galaxies and 24 quasars from the 3CR catalog at redshift 1<z<2.5. This 178 MHz-selected sample is unbiased with respect to orientation and therefore…

天体物理学 · 物理学 2009-11-13 M. Haas , S. V. P. Willner , F. Heymann , M. L. N. Ashby , G. G. Fazio , B. J. Wilkes , R. Chini , R. Siebenmorgen

We present tentative H-alpha emission line detections of four submillimetre-detected galaxies at z>3.5: the radio galaxies 8C1909+722 and 4C60.07 at signal-to-noise ratios (SNRs) of 3.1 and 2.5, and two submillimetre-selected galaxies…

In this article we study the morphology, kinematics and ionization properties of the giant ionized gas nebulae surrounding two high redshift radio galaxies, 4C40.36 (z=2.27) and 4C48.48 (z=2.34).}{Integral Field Spectroscopy observations…

天体物理学 · 物理学 2009-11-13 S. F. Sanchez , A. Humphrey

We study the correlation between the radio, mid-infrared and far-infrared properties for a sample of 28 blue compact dwarf (BCD) and low metallicity star-forming galaxies observed by Spitzer. We find that these sources extend the same…

天体物理学 · 物理学 2009-11-13 Yanling Wu , V. Charmandaris , J. R. Houck , J. Bernard-Salas , V. Lebouteiller , B. R. Brandl , D. Farrah

Using the filled bolometer array SHARC-II on the Caltech Submillimeter Observatory (CSO), we have obtained deep (rms ~ 15mJy/beam), high-quality 350 micron maps of five of the most luminous high-z radio galaxies known. In all cases the…

天体物理学 · 物理学 2009-11-11 T. R. Greve , R. J. Ivison , J. A. Stevens

We present mid-infrared spectroscopy obtained with the Spitzer Space Telescope of a sample of 11 optically faint, infrared luminous galaxies selected from a Spitzer MIPS 70um imaging survey of the NDWFS Bootes field. These are the first…

Near-infrared images of the luminous, high redshift (z=2.1108) radio loud quasar 4C+09.17 reveal a complex structure. The quasar (K=15.76 mag) is surrounded by three "companion" objects having 17.9< K < 20.2 mag at radii of 1.7" < r < 2.9",…

天体物理学 · 物理学 2015-06-24 L. Armus , G. Neugebauer , M. D. Lehnert , K. Matthews

We have used the Submillimeter Array to image a flux limited sample of seven submillimeter galaxies, selected by the AzTEC camera on the JCMT at 1.1 mm, in the COSMOS field at 890um with 2" resolution. All of the sources - two radio-bright…

The mid-infrared spectra of star-forming galaxies (SFGs) are characterized by characteristic broad PAH emission features at 3-20 $\mu$m. As these features are redshifted, they are predicted to dominate the flux at specific mid-infrared…

星系天体物理 · 物理学 2023-11-13 Danial Langeroodi , Jens Hjorth

In this letter we report the discovery of a z=4.88 radio galaxy discovered with a new technique which does not rely on pre-selection of a sample based on radio properties such as steep-spectral index or small angular size. This radio galaxy…

宇宙学与河外天体物理 · 物理学 2015-05-13 Matt J. Jarvis , Hanifa Teimourian , Chris Simpson , Daniel J. B. Smith , Steve Rawlings , David Bonfield

Study of high-redshift radio galaxies (HzRGs) can shed light on the active galactic nuclei (AGNs) evolution in massive elliptical galaxies. The vast majority of observed high-redshift AGNs are quasars, and there are very few radio galaxies…

We present sensitive imaging at 1.4 GHz of the two highest redshift far-infrared (FIR) luminous QSOs SDSS J114816.65+525150.2 (z=6.42) and SDSS J104845.05+463718.3 (z=6.2). Radio continuum emission is detected from J1148+5251 with S_{1.4} =…