Zobrazeno 1 - 10
of 284
pro vyhledávání: '"Vaeisaenen, P."'
We study the out-of-equilibrium production of non-minimally coupled self-interacting scalar dark matter during reheating using classical lattice simulations. The outcomes of the classical simulations are in qualitative agreement with the previous res
Externí odkaz:
http://arxiv.org/abs/2406.17468
Autor:
Greenwell, Claire L., Klindt, Lizelke, Lansbury, George B., Rosario, David J., Alexander, David M., Aird, James, Stern, Daniel, Forster, Karl, Koss, Michael J., Bauer, Franz E., Ricci, Claudio, Tomsick, John, Brandt, William N., Connor, Thomas, Boorman, Peter G., Annuar, Adlyka, Ballantyne, David R., Chen, Chien-Ting, Civano, Francesca, Comastri, Andrea, Fawcett, Victoria A., Fornasini, Francesca M., Gandhi, Poshak, Harrison, Fiona, Heida, Marianne, Hickox, Ryan, Kammoun, Elias S., Lanz, Lauranne, Marchesi, Stefano, Noirot, Gaël, Romero-Colmenero, Encarni, Treister, Ezequiel, Urry, C. Megan, Väisänen, Petri, van Soelen, Brian
We present a catalog of hard X-ray serendipitous sources detected in the first 80 months of observations by the Nuclear Spectroscopic Telescope Array (NuSTAR). The NuSTAR serendipitous survey 80-month (NSS80) catalog has an unprecedented $\sim$ 62 Ms
Externí odkaz:
http://arxiv.org/abs/2404.17637
Autor:
Sneppen, Albert, Watson, Darach, Damgaard, Rasmus, Heintz, Kasper E., Vieira, Nicholas, Väisänen, Petri, Mahoro, Antoine
Publikováno v:
A&A 690, A398 (2024)
The spectral features in the optical/near-infrared counterparts of neutron star mergers (kilonovae, KNe), evolve dramatically on hour timescales. To examine the spectral evolution we compile a temporal series complete at all observed epochs from 0.5
Externí odkaz:
http://arxiv.org/abs/2404.08730
Autor:
Viitasaari, Henrik, Färdig, Oskari, Siljander, Joona H., Väisänen, A. Petrus, Harju, Aapo S., Nurminen, Antti V., Kinnunen, Jami J.
The Arago spot is an intensity maximum at the center of a shadow created by constructive interference of diffracted waves around a spherical object. While the study of diffraction patterns usually concerns visible light, de Broglie's wave nature of m
Externí odkaz:
http://arxiv.org/abs/2403.20087
We present Fabry-P\'erot (FP) imaging and longslit spectroscopy of the nearby Seyfert II galaxy NGC 1068 using the Robert Stobie Spectrograph (RSS) on the Southern African Large Telescope (SALT) to observe the impact of the central Active Galactic Nu
Externí odkaz:
http://arxiv.org/abs/2307.06351
We have performed a 5-colour surface photometric study of the high-galactic-latitude area of dark nebula LDN 1642. Scattered light properties are presented of diffuse, translucent and opaque dust over the range of 3500 -- 5500 A. Far infrared absolut
Externí odkaz:
http://arxiv.org/abs/2306.16467
Autor:
Mahoro, Antoine, Väisänen, Petri, Pović, Mirjana, Nkundabakura, Pheneas, van der Heyden, Kurt, Cazzoli, Sara, Worku, Samuel B., Márquez, Isabel, Masegosa, Josefa, Randriamampandry, Solohery M., Mogotsi, Moses
We present a study of the $\rm{[OIII]\lambda\,5007}$ line profile in a sub-sample of 8 active galactic nuclei (AGN) and 6 non-AGN in the optically-selected green valley at $\rm{z\,<\,0.5}$ using long-slit spectroscopic observations with the 11 m Sout
Externí odkaz:
http://arxiv.org/abs/2304.09284
Autor:
Feltre, A., Gruppioni, C., Marchetti, L., Mahoro, A., Salvestrini, F., Mignoli, M., Bisigello, L., Calura, F., Charlot, S., Chevallard, J., Romero-Colmenero, E., Curtis-Lake, E., Delvecchio, I., Dors, O. L., Hirschmann, M., Jarrett, T., Marchesi, S., Moloko, M. E., Plat, A., Pozzi, F., Sefako, R., Traina, A., Vaccari, M., Väisänen, P., Vallini, L., Vidal-García, A., Vignali, C.
Line ratio diagnostics provide valuable clues on the source of ionizing radiation in galaxies with intense black hole accretion and starbursting events, such as local Seyfert or galaxies at the peak of the star formation history. We aim to provide a
Externí odkaz:
http://arxiv.org/abs/2301.02252
Autor:
Mahoro, Antoine, Pović, Mirjana, Väisänen, Petri, Nkundabakura, Pheneas, van der Heyden, Kurt
We present a study on the stellar populations and stellar ages of sub-sample of far-infrared AGN and non-AGN green valley analysed in Mahoro et al. (2017,2019) at 0.6 < z < 1.0 using the data from the COSMOS field. We used long-slit spectroscopy and
Externí odkaz:
http://arxiv.org/abs/2204.10570
Autor:
Lin, Yu-Heng, Scarlata, Claudia, Hayes, Matthew, Feltre, Anna, Charlot, Stephane, Bongiorno, Angela, Väisänen, Petri, Mogotsi, Moses
We present S82-20, an unusual redshift $\approx$3 object identified in SDSS-Stripe 82 broad-band images. The rest-frame ultraviolet spectrum of S82-20 shows emission lines from highly ionized species, including HeII $\lambda$1640, and the CIV $\lambd
Externí odkaz:
http://arxiv.org/abs/2111.03678