Zobrazeno 1 - 10
of 212
pro vyhledávání: '"Pfenniger, D."'
Results from the UV satellite GALEX revealed large extensions of disks in some nearby spiral galaxies, extending out to 3 to 4 times the isophotal radius, r25. M63 is a remarkable example of a spiral galaxy with one of the most extended UV disks, so
Externí odkaz:
http://arxiv.org/abs/1406.0310
We use the Wilkinson Microwave Anisotropy Probe 7-year data (WMAP7) to further probe point source detection technique in the sky maps of the cosmic microwave background (CMB) radiation. The method by Tegmark et al. for foreground reduced maps and the
Externí odkaz:
http://arxiv.org/abs/1206.7121
The near proportionality between HI and dark matter in outer galactic disks prompted us to run N-body simulations of galactic disks in which the observed gas content is supplemented by a dark gas component representing between zero and five times the
Externí odkaz:
http://arxiv.org/abs/0904.4638
$\Lambda$CDM numerical simulations predict that the "missing baryons" reside in a Warm-Hot gas phase in the over-dense cosmic filaments. However, there are now several theoretical and observational arguments that support the fact that galactic disks
Externí odkaz:
http://arxiv.org/abs/0801.1180
We report a new search for 12CO(1-0) emission in high-velocity clouds (HVCs) performed with the IRAM 30 m telescope. This search was motivated by the recent detection of cold dust emission in the HVCs of Complex C. Despite a spatial resolution which
Externí odkaz:
http://arxiv.org/abs/0708.1120
Autor:
Revaz, Y., Pfenniger, D.
Publikováno v:
PoS BDMH2004 (2004) 058
Based on N-body simulations, we show that realistic galactic disks are subject to bending instabilities of fire-hose type when the disks are substantially self-gravitating, that is, if they contain dark matter distributed in the disk. Depending on th
Externí odkaz:
http://arxiv.org/abs/astro-ph/0412402
Autor:
Pfenniger, D., Revaz, Y.
The Baryonic Tully-Fisher relation (BTF) can be substantially improved when considering that the galactic baryonic mass is likely to consist not only from the detected baryons, stars and gas, but also from a dark baryonic component proportional to th
Externí odkaz:
http://arxiv.org/abs/astro-ph/0409621
Autor:
Pfenniger, D., Puy, D.
Publikováno v:
Astron.Astrophys. 398 (2003) 447-454
The thermochemistry of H2 and HD in non-collapsed, non-reionized primordial gas up to the end of the dark age is investigated with recent radiation-matter and chemical reaction rates taking into account the efficient coolant HD, and the possibility o
Externí odkaz:
http://arxiv.org/abs/astro-ph/0211393
Autor:
Revaz, Y., Pfenniger, D.
It is often assumed that a warped galaxy can be modeled by a set of rings. This paper verifies numerically the validity of this assumption by the study of periodic orbits populating a heavy self-gravitating warped disk. The phase space structure of a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0105162
Autor:
Puerari, I., Pfenniger, D.
Publikováno v:
Astrophys.Space Sci. 276 (2001) 909-914
In this contribution, we investigate the scenario of major mergers between galaxies of comparable mass to the formation of massive counter-rotating disks. Such a scenario can be ruled out in general because they produce rather ellipticals. Yet for a
Externí odkaz:
http://arxiv.org/abs/astro-ph/9903096