Zobrazeno 1 - 10
of 914
pro vyhledávání: '"Röttgering, H J A"'
Autor:
Groeneveld, C., van Weeren, R. J., Botteon, A., Cassano, R., de Gasperin, F., Osinga, E., Brunetti, G., Röttgering, H. J. A.
Some galaxy clusters contain non-thermal synchrotron emitting plasma permeating the intracluster medium (ICM). The spectral properties of this radio emission are not well characterized at decameter wavelengths ({\nu} < 30 MHz), primarily due to the s
Externí odkaz:
http://arxiv.org/abs/2412.05360
Autor:
Kondapally, R., Best, P. N., Duncan, K. J., Röttgering, H. J. A., Smith, D. J. B., Prandoni, I., Hardcastle, M. J., Holc, T., Patrick, A. L., Arnaudova, M. I., Mingo, B., Cochrane, R. K., Das, S., Haskell, P., Magliocchetti, M., Małek, K., Miley, G. K., Tasse, C., Williams, W. L.
We characterise the co-evolution of radio-loud AGN and their galaxies by mapping the dependence of radio-loud AGN activity on stellar mass and star-formation rate (SFR) across cosmic time (out to $z \sim 1.5$). Deep LOFAR radio observations are combi
Externí odkaz:
http://arxiv.org/abs/2411.08104
Autor:
Morabito, Leah K., Kondapally, R., Best, P. N., Yue, B. -H., de Jong, J. M. G. H. J., Sweijen, F., Bondi, Marco, Schwarz, Dominik J., Smith, D. J. B., van Weeren, R. J., Röttgering, H. J. A., Shimwell, T. W., Prandoni, Isabella
Both star formation (SF) and Active Galactic Nuclei (AGN) play an important role in galaxy evolution. Statistically quantifying their relative importance can be done using radio luminosity functions. Until now these relied on galaxy classifications,
Externí odkaz:
http://arxiv.org/abs/2411.05069
Autor:
Drake, A. B., Smith, D. J. B., Hardcastle, M. J., Best, P. N., Kondapally, R., Arnaudova, M. I., Das, S., Shenoy, S., Duncan, K. J., Röttgering, H. J. A., Tasse, C.
We present an analysis of 152,355 radio sources identified in the second data release of the LOFAR Two Metre Sky Survey (LoTSS-DR2) with Sloan Digital Sky Survey (SDSS) spectroscopic redshifts in the range 0.00 < z < 0.57. Using Monte Carlo simulatio
Externí odkaz:
http://arxiv.org/abs/2409.11465
Autor:
Rajpurohit, K., O'Sullivan, E., Schellenberger, G., Brienza, M., Vrtilek, J. M., Forman, W., David, L. P., Clarke, T., Botteon, A., Vazza, F., Giacintucci, S., Jones, C., Brüggen, M., Shimwell, T. W., Drabent, A., Loi, F., Loubser, S. I., Kolokythas, K., Babyk, I., Röttgering, H. J. A.
We present deep, wideband multifrequency radio observations (144 MHz$-$8 GHz) of the remarkable galaxy group NGC 741, which yield crucial insights into the interaction between the infalling head-tail radio galaxy (NGC 742) and the main group. Our new
Externí odkaz:
http://arxiv.org/abs/2408.15197
Autor:
de Jong, J. M. G. H. J., van Weeren, R. J., Sweijen, F., Oonk, J. B. R., Shimwell, T. W., Offringa, A. R., Morabito, L. K., Röttgering, H. J. A., Kondapally, R., Escott, E. L., Best, P. N., Bondi, M., Ye, H., Petley, J. W.
We present the deepest wide-field 115-166 MHz image at sub-arcsecond resolution spanning an area of 2.5 by 2.5 degrees centred at the ELAIS-N1 deep field. To achieve this, we improved the calibration for the International LOFAR Telescope. This enhanc
Externí odkaz:
http://arxiv.org/abs/2407.13247
Publikováno v:
A&A 689, A264 (2024)
Recent sensitive wide-field radio surveys, such as the LOFAR Two Meter Sky Survey (LoTSS), the LOFAR LBA Sky Survey (LoLSS), and the Very Large Array Sky Survey (VLASS), enable the selection of statistically large samples of peaked-spectrum (PS) sour
Externí odkaz:
http://arxiv.org/abs/2406.13346
Autor:
Spasic, A., Edler, H. W., Su, Y., Brüggen, M., de Gasperin, F., Pasini, T., Heesen, V., Simonte, M., Boselli, A., Röttgering, H. J. A., Fossati, M.
Publikováno v:
A&A 690, A195 (2024)
The evolution of Active Galactic Nuclei (AGN) is closely connected to their host galaxies and surroundings. Via feedback processes, AGN can counteract the cooling of the intracluster medium (ICM) and suppress star formation in their host galaxies. Ra
Externí odkaz:
http://arxiv.org/abs/2406.00781
Autor:
Osinga, E., van Weeren, R. J., Brunetti, G., Adam, R., Rajpurohit, K., Botteon, A., Callingham, J. R., Cuciti, V., de Gasperin, F., Miley, G. K., Röttgering, H. J. A., Shimwell, T. W.
Publikováno v:
A&A 688, A175 (2024)
Merging galaxy clusters often host spectacular diffuse radio synchrotron sources. These sources can be explained by a non-thermal pool of relativistic electrons accelerated by shocks and turbulence in the intracluster medium. The origin of the pool a
Externí odkaz:
http://arxiv.org/abs/2405.09384
Autor:
Groeneveld, C., van Weeren, R. J., Osinga, E., Williams, W. L., Callingham, J. R., de Gasperin, F., Botteon, A., Shimwell, T., de Jong, J. M. G. H. J., Jansen, L. F., Miley, G. K., Brunetti, G., Brüggen, M., Röttgering, H. J. A.
Publikováno v:
Nature Astronomy 8 (2024) 786-795
The largely unexplored decameter radio band (10-30 MHz) provides a unique window for studying a range of astronomical topics, such as auroral emission from exoplanets, inefficient cosmic ray acceleration mechanisms, fossil radio plasma, and free-free
Externí odkaz:
http://arxiv.org/abs/2405.05311