Výsledky vyhledávání - "K. J. van der Heyden"

A spectroscopic analysis of the eclipsing nova-like EC 21178−5417 – discovery of spiral density structures

Autor: S. B. Potter, Patrick Woudt, David Kilkenny, Z. N. Khangale, B. Warner, K. J. van der Heyden

Publikováno v: Monthly Notices of the Royal Astronomical Society. 495:637-649

We present phase-resolved optical spectroscopy of the eclipsing nova-like cataclysmic variable EC21178-5417 obtained between 2002 and 2013. The average spectrum of EC21178-5417 shows broad double-peaked emission lines from HeII 4686 \AA{} (strongest

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e06a3721306b7b89298b6e1b447c6988
https://doi.org/10.1093/mnras/staa680

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MeerKAT's discovery of a radio relic in the bimodal merging cluster A2384

Autor: Simon Perkins, D. Kleiner, Kshitij Thorat, V. Parekh, B. Hugo, K. J. van der Heyden, Oleg Smirnov, L. A. L. Andati, Gyula I. G. Józsa, Sarah V. White, Ruta Kale, M. Ramatsoku, S. Makhathini, A. J. T. Ramaila, Nadeem Oozeer

We present the discovery of a single radio relic located at the edge of the galaxy cluster A2384, using the MeerKAT radio telescope. A2384 is a nearby ($z$ = 0.092), low mass, complex bimodal, merging galaxy cluster that displays a dense X-ray filame

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54cc9af808dd8c50f1844d31ded3a86d
http://arxiv.org/abs/2009.02724

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A rare case of FR I interaction with a hot X-ray bridge in the A2384 galaxy cluster

Autor: Asif Iqbal, V. Parekh, Tatiana F. Laganá, Kshitij Thorat, K. J. van der Heyden, Florence Durret

Publikováno v: Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2020, 491 (2), pp.2605-2616. ⟨10.1093/mnras/stz3067⟩

Clusters of varying mass ratios can merge and the process significantly disturbs the cluster environments and alters their global properties. Active radio galaxies are another phenomenon that can also affect cluster environments. Radio jets can inter

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c8708e0b26490d7dcbabdef6bf3b6f22

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N-body simulations of the Carina dSph in MOND

Autor: Gianfranco Gentile, Antonaldo Diaferio, Benoit Famaey, G. W. Angus, K. J. van der Heyden

Publikováno v: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

The classical dwarf spheroidals (dSphs) provide a critical test for Modified Newtonian Dynamics (MOND) because they are observable satellite galactic systems with low internal accelerations and low, but periodically varying, external acceleration. Th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8dfce2dbc32e8c1d034ae5d8064e882
https://doi.org/10.1093/mnras/stu182

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Cosmological simulations in MOND: the cluster scale halo mass function with light sterile neutrinos

Autor: Benoit Famaey, Antonaldo Diaferio, K. J. van der Heyden, G. W. Angus

Publikováno v: Monthly Notices of the Royal Astronomical Society. 436:202-211

We use our Modified Newtonian Dynamics (MOND) cosmological particle-mesh N-body code to investigate the feasibility of structure formation in a framework involving MOND and light sterile neutrinos in the mass range 11 - 300 eV: always assuming that �

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98ef77b00aa7a089e8593387f047354e
https://doi.org/10.1093/mnras/stt1564

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CC Sculptoris: a superhumping intermediate polar

Autor: K. L. Page, K. J. van der Heyden, Phil Evans, Amanda A. S. Gulbis, Franz-Josef Hambsch, Andrew P. Beardmore, J. P. Osborne, Brian Warner, R. Coppejans, Patrick A. Woudt, Graham A. Wynn

Publikováno v: Monthly Notices of the Royal Astronomical Society. 427:1004-1013

We present high speed optical, spectroscopic and Swift X-ray observations made during the dwarf nova superoutburst of CC Scl in November 2011. An orbital period of 1.383 h and superhump period of 1.443 h were measured, but the principal new finding i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8107723d76e588c3fe44295610f26bdb
https://doi.org/10.1111/j.1365-2966.2012.22010.x

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Quantified H i morphology - II. Lopsidedness and interaction in WHISP column density maps

Autor: A. Bouchard, S. L. Blyth, Edward C. Elson, W. J. G. de Blok, Benne W. Holwerda, K. J. van der Heyden, Nor Pirzkal

Publikováno v: Monthly Notices of the Royal Astronomical Society. 416:2415-2425

Lopsidedness of the gaseous disk of spiral galaxies is a common phenomenon in disk morphology, profile and kinematics. Simultaneously, the asymmetry of a galaxy's stellar disk, in combination with other morphological parameters, has seen extensive us

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8beed668e46e232f4d789a9335b8451e
https://doi.org/10.1111/j.1365-2966.2011.17683.x

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Quantified H i morphology - IV. The merger fraction and rate in WHISP

Autor: A. Bouchard, W. J. G. de Blok, S. L. Blyth, Nor Pirzkal, K. J. van der Heyden, Benne W. Holwerda

Publikováno v: Monthly Notices of the Royal Astronomical Society. 416:2437-2446

The morphology of the atomic hydrogen (HI) disk of a spiral galaxy is the first component to be disturbed by a gravitational interaction such as a merger between two galaxies. We use a simple parametrisation of the morphology of HI column density map

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::66904ceaf90c348a0f1b2fc69ab0b64c
https://doi.org/10.1111/j.1365-2966.2011.18942.x

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Quantified H i morphology - I. Multi-wavelength analysis of the THINGS galaxies

Autor: K. J. van der Heyden, Nor Pirzkal, Edward C. Elson, A. Bouchard, W. J. G. de Blok, S. L. Blyth, Benne W. Holwerda

Publikováno v: Monthly Notices of the Royal Astronomical Society. 416:2401-2414

Galaxy evolution is driven to a large extent by interactions and mergers with other galaxies and the gas in galaxies is extremely sensitive to the interactions. One method to measure such interactions uses the quantified morphology of galaxy images.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::044a3517b153f7c446efd101ca7e5886
https://doi.org/10.1111/j.1365-2966.2011.18938.x

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Luminous red galaxies in simulations: cosmic chronometers?

Autor: Steven M. Crawford, E. A. Olivier, K. J. van der Heyden, C. M. Cress, Simon Blyth, A. L. Ratsimbazafy

Publikováno v: Monthly Notices of the Royal Astronomical Society. 406:2569-2577

There have been a number of attempts to measure the expansion rate of the universe at high redshift using Luminous Red Galaxies (LRGs) as "chronometers". The method generally assumes that stars in LRGs are all formed at the same time. In this paper,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::80086976c00322b8f5b3373dd894a057
https://doi.org/10.1111/j.1365-2966.2010.16849.x

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