Zobrazeno 1 - 10
of 302
pro vyhledávání: '"PEIRANI S"'
Autor:
Palicio, P. A., Recio-Blanco, A., Tepper-Garcia, T., Poggio, E., Peirani, S., Dubois, Y., McMillan, P. J., Bland-Hawthorn, J., Kraljic, K., Barbillon, M.
Among the various implications of the spiral arms, it has been observed in the Milky Way disc that the distribution of radial actions from the Gaia Data Release 3 exhibits structures that may be related to the spiral arms. Our goal is to investigate
Externí odkaz:
http://arxiv.org/abs/2412.17515
Autor:
Uzeirbegovic, E., Martin, G., Kaviraj, S., Jackson, R. A., Kraljic, K., Dubois, Y., Pichon, C., Devriendt, J., Peirani, S., Silk, J., Yi, S. K.
We introduce a new concept -- termed "planarity" -- which aims to quantify planar structure in galaxy satellite systems without recourse to the number or thickness of planes. We use positions and velocities from the Gaia EDR3 to measure planarity in
Externí odkaz:
http://arxiv.org/abs/2411.17813
Autor:
Jackson, R. A., Kaviraj, S., Yi, S. K., Peirani, S., Dubois, Y., Martin, G., Devriendt, J. E. G., Slyz, A., Pichon, C., Volonteri, M., Kimm, T., Kraljic, K.
The `core-cusp' problem is considered a key challenge to the LCDM paradigm. Halos in dark matter only simulations exhibit `cuspy' profiles, where density continuously increases towards the centre. However, the dark matter profiles of many observed ga
Externí odkaz:
http://arxiv.org/abs/2310.13055
Autor:
Spitoni, E., Cescutti, G., Recio-Blanco, A., Minchev, I., Poggio, E., Palicio, P. A., Matteucci, F., Peirani, S., Barbillon, M., Vasini, A.
Publikováno v:
A&A 680, A85 (2023)
According to observations and numerical simulations, the Milky Way could exhibit several spiral arm modes with multiple pattern speeds, wherein the slower patterns are located at larger Galactocentric distances. Our aim is to quantify the effects of
Externí odkaz:
http://arxiv.org/abs/2310.11504
Publikováno v:
A&A 678, A61 (2023)
Context: In the last years, a significant number of works have focused on finding analytic solutions for the chemical enrichment models of galactic systems, including the Milky Way. Some of these solutions, however, cannot account for the enrichment
Externí odkaz:
http://arxiv.org/abs/2304.00042
Autor:
Smethurst, R. J., Beckmann, R. S., Simmons, B. D., Coil, A., Devriendt, J., Dubois, Y., Garland, I. L., Lintott, C. J., Martin, G., Peirani, S.
Recent observational and theoretical studies have suggested that supermassive black holes (SMBHs) grow mostly through non-merger (`secular') processes. Since galaxy mergers lead to dynamical bulge growth, the only way to observationally isolate non-m
Externí odkaz:
http://arxiv.org/abs/2211.13677
Autor:
Beckmann, R. S., Smethurst, R. J., Simmons, B. D., Coil, A., Dubois, Y., Garland, I. L., Lintott, C. J., Martin, G., Peirani, S., Pichon, C.
Here we use the Horizon-AGN simulation to test whether the spins of SMBHs in merger-free galaxies are higher. We select samples using an observationally motivated bulge-to-total mass ratio of < 0.1, along with two simulation motivated thresholds sele
Externí odkaz:
http://arxiv.org/abs/2211.13614
Autor:
Beckmann, R. S., Dubois, Y., Volonteri, M., Dong-Páez, C. A., Trebitsch, M., Devriendt, J., Kaviraj, S., Kimm, T., Peirani, S.
While it is well established that supermassive black holes (SMBHs) co-evolve with their host galaxy, it is currently less clear how lower mass black holes, so-called intermediate mass black holes (IMBHs), evolve within their dwarf galaxy hosts. In th
Externí odkaz:
http://arxiv.org/abs/2211.13301
Autor:
Peirani, S., Prunet, S., Colombi, S., Pichon, C., Weinberg, D. H., Laigle, C., Lavaux, G., Dubois, Y., Devriendt, J.
We present LyMAS2, an improved version of the "Lyman-{\alpha} Mass Association Scheme" aiming at predicting the large-scale 3d clustering statistics of the Lyman-{\alpha} forest (Ly-{\alpha}) from moderate resolution simulations of the dark matter (D
Externí odkaz:
http://arxiv.org/abs/2204.06365
Autor:
Davis, F., Kaviraj, S., Hardcastle, M. J., Martin, G., Jackson, R. A., Kraljic, K., Malek, K., Peirani, S., Smith, D. J. B., Volonteri, M., Wang, L.
We combine deep optical and radio data, from the Hyper Suprime-Cam and the Low-Frequency Array (LOFAR) respectively, to study 78 radio AGN in nearby (z<0.5) dwarf galaxies. Comparison to a control sample, matched in stellar mass and redshift, indicat
Externí odkaz:
http://arxiv.org/abs/2201.09903