Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Rand, R. J."'
Autor:
Kamphuis, P., Jütte, E., Heald, G. H., Ruiz, N. Herrera, Józsa, G. I. G., de Blok, W. J. G., Serra, P., Marasco, A., Dettmar, R. -J., Pingel, N. M., Oosterloo, T., Rand, R. J., Walterbos, R. A. M., van der Hulst, J. M.
Publikováno v:
A&A 668, A182 (2022)
Galaxies in the local Universe are thought to require ongoing replenishment of their gas reservoir in order to maintain the observed star formation rates. Cosmological simulations predict that such accretion can occur in both a dynamically hot and co
Externí odkaz:
http://arxiv.org/abs/2210.09383
Autor:
Heald, G. H., Heesen, V., Sridhar, S. S., Beck, R., Bomans, D. J., Brüggen, M., Chyży, K. T., Damas-Segovia, A., Dettmar, R. -J., English, J., Henriksen, R., Ideguchi, S., Irwin, J., Krause, M., Li, J. -T., Murphy, E. J., Nikiel-Wroczyński, B., Piotrowska, J., Rand, R. J., Shimwell, T., Stein, Y., Vargas, C. J., Wang, Q. D., van Weeren, R. J., Wiegert, T.
We present new radio continuum images of the edge-on starburst galaxy NGC 5775, from LOFAR (140 MHz) and the Karl G. Jansky Very Large Array CHANG-ES survey (1500 MHz). We trace the non-thermal radio halo up to 13 kpc from the disc, measuring the non
Externí odkaz:
http://arxiv.org/abs/2109.12267
Autor:
Pingel, N. M., Pisano, D. J., Heald, G., Jarrett, T. H., de Blok, W. J. G., Józsa, G. I. G., Jütte, E., Rand, R. J., Oosterloo, T., Winkel, B.
We present initial results from a deep neutral hydrogen (HI) survey of the HALOGAS galaxy sample, which includes the spiral galaxies NGC891, NGC925, NGC4414, and NGC4565, performed with the Robert C. Byrd Green Bank Telescope (GBT). The resulting obs
Externí odkaz:
http://arxiv.org/abs/1808.02041
Autor:
de Blok, W. J. G., Józsa, G. I. G., Patterson, M., Gentile, G., Heald, G. H., Jütte, E., Kamphuis, P., Rand, R. J., Serra, P., Walterbos, R. A. M.
We present deep HI imaging of the nearby spiral galaxy NGC 4414, taken as part of the Westerbork HALOGAS (Hydrogen Accretion in LOcal GAlaxieS) survey. The observations show that NGC 4414 can be characterized by a regularly rotating inner HI disk, an
Externí odkaz:
http://arxiv.org/abs/1405.2160
Autor:
Kamphuis, P., Rand, R. J., Józsa, G. I. G., Zschaechner, L. K., Heald, G. H., Patterson, M. T., Gentile, G., Walterbos, R. A. M., Serra, P., de Blok, W. J. G.
In recent years it has become clear that the vertical structure of disk galaxies is a key ingredient for understanding galaxy evolution. In particular, the presence and structure of extra-planar gas has been a focus of research. The Hydrogen Accretio
Externí odkaz:
http://arxiv.org/abs/1306.5312
Publikováno v:
Astron.J.132:242-252,2006
At low radio frequencies (< 100 MHz), classical HII regions may become optically thick (optical depth > 1) and can be observed as discrete absorption regions against the Galactic nonthermal background emission created by Galactic cosmic ray electrons
Externí odkaz:
http://arxiv.org/abs/astro-ph/0603057
Publikováno v:
Mon.Not.Roy.Astron.Soc.Lett.366:L17-L21,2006
The lifetime of the structure in grand design spiral galaxies is observationally ill-determined, but is essentially set by how accurately the pattern's rotation can be characterized by a single angular pattern speed. This paper derives a generalized
Externí odkaz:
http://arxiv.org/abs/astro-ph/0511069
Autor:
Meidt, S. E., Rand, R. J.
Spiral galaxies displaying molecule-dominated ISMs are potential candidates for pattern speed determination by the Tremaine-Weinberg (TW) method (1984); the molecular gas of such galaxies, as traced by CO emission, is argued to approximately obey the
Externí odkaz:
http://arxiv.org/abs/astro-ph/0509763
Publikováno v:
Astrophys.J.636:181-199,2005
We present imaging Fabry-Perot observations of Halpha emission in the nearly edge-on spiral galaxy NGC 5775. We have derived a rotation curve and a radial density profile along the major axis by examining position-velocity (PV) diagrams from the Fabr
Externí odkaz:
http://arxiv.org/abs/astro-ph/0509225
We present WIYN SparsePak observations of the diffuse ionized gas (DIG) halo of NGC 891. Preliminary results of an analysis of the halo velocity field reveal a clear gradient of the azimuthal velocity with z which agrees with results for the neutral
Externí odkaz:
http://arxiv.org/abs/astro-ph/0508559