Zobrazeno 1 - 10
of 221
pro vyhledávání: '"Condon, J. J."'
Autor:
Matthews, A. M, Kelson, D. D., Newman, A. B., Camilo, F., Condon, J. J., Cotton, W. D., Dickinson, M., Jarrett, T. H., Lacy, M.
We present the initial sample of redshifts for 3,839 galaxies in the MeerKAT DEEP2 field -- the deepest $\sim$1.4\,GHz radio field yet observed. Using a spectrophotometric technique combining coarse optical spectra with broadband photometry, we obtai
Externí odkaz:
http://arxiv.org/abs/2310.17701
Autor:
Cotton, W. D., Camilo, F., Becker, W., Condon, J. J., Forbrich, J., Heywood, I., Hugo, B., Legodi, S., Mauch, T., Predehl, P., Slane, P., Thompson, M. A.
The curious Galactic features near G357.2$-$0.2 were observed with the MeerKAT radio interferometer array in the UHF and L bands (0.56--1.68 GHz). There are two possibly related features: a newly identified faint heart-shaped partial shell (the "Hear
Externí odkaz:
http://arxiv.org/abs/2205.06600
Autor:
Condon, J. J., Cotton, W. D., Jarrett, T., Marchetti, L, Matthews, A. M., Mauch, T., Moloko, M. E.
The IRAS Revised Bright Galaxy Sample (RBGS) comprises galaxies and unresolved mergers stronger than $S = 5.24$ Jy at $\lambda = 60~\mu\mathrm{m}$ with galactic latitudes $\vert b \vert > 5^\circ$. Nearly all are dusty star-forming galaxies whose rad
Externí odkaz:
http://arxiv.org/abs/2108.07891
Autor:
Condon, J. J., Cotton, W. D., White, S. V., Legodi, S., Goedhart, S., McAlpine, K., Ratcliffe, S. M., Camilo, F.
The nearby elliptical galaxy IC4296 has produced a large (510 kpc) low-luminosity radio source with typical FR I core/jet/lobe morphology. The unprecedented combination of brightness sensitivity, dynamic range, and angular resolution of a new 1.28 GH
Externí odkaz:
http://arxiv.org/abs/2106.05340
We matched the 1.4 GHz local luminosity functions of star-forming galaxies (SFGs) and active galactic nuclei to the 1.4 GHz differential source counts from $0.25 \ \mu\mathrm{Jy}$ to 25 Jy using combinations of luminosity and density evolution. We pr
Externí odkaz:
http://arxiv.org/abs/2104.11756
Massive black holes (BHs) in dwarf galaxies can provide strong constraints on BH seeds, however reliably detecting them is notoriously difficult. High resolution radio observations were recently used to identify accreting massive BHs in nearby dwarf
Externí odkaz:
http://arxiv.org/abs/2101.12217
Brightness-weighted differential source counts $S^2 n(S)$ spanning the eight decades of flux density between $0.25\,\mu\mathrm{Jy}$ and 25 Jy at 1.4 GHz were measured from (1) the confusion brightness distribution in the MeerKAT DEEP2 image below $10
Externí odkaz:
http://arxiv.org/abs/2101.07827
Autor:
Cotton, W. D., Thorat, K., Condon, J. J., Frank, B . S., Józsa, G . I. G., White, S. V., Deane, R ., Oozeer, N., Atemkeng, M., Bester, L., Fanaroff, B., Kupa, R. S., Smirnov, O. M., Mauch, T., Krishnan, V., Camilo, F.
We present MeerKAT 1.28 GHz total-intensity, polarization, and spectral-index images covering the giant (projected length $l \approx 1.57$~Mpc) X-shaped radio source PKS~2014$-$55 with an unprecedented combination of brightness sensitivity and angula
Externí odkaz:
http://arxiv.org/abs/2005.02723
Autor:
Pesce, D. W., Braatz, J. A., Reid, M. J., Riess, A. G., Scolnic, D., Condon, J. J., Gao, F., Henkel, C., Impellizzeri, C. M. V., Kuo, C. Y., Lo, K. Y.
We present a measurement of the Hubble constant made using geometric distance measurements to megamaser-hosting galaxies. We have applied an improved approach for fitting maser data and obtained better distance estimates for four galaxies previously
Externí odkaz:
http://arxiv.org/abs/2001.09213
Autor:
Pesce, D. W., Braatz, J. A., Reid, M. J., Condon, J. J., Gao, F., Henkel, C., Kuo, C. Y., Lo, K. Y., Zhao, W.
As part of the survey component of the Megamaser Cosmology Project, we have discovered a disk megamaser system in the galaxy CGCG 074-064. Using the GBT and the VLA, we have obtained spectral monitoring observations of this maser system at a monthly
Externí odkaz:
http://arxiv.org/abs/2001.04581