Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Prugniel, Philippe"'
Autor:
Kumar, Nitesh, Bhardwaj, Anupam, Singh, Harinder P., Rejkuba, Marina, Marconi, Marcella, Prugniel, Philippe
We present a comprehensive photometric study of RR Lyrae stars in the M3 globular cluster, utilising a vast dataset of 3140 optical ($UBVRI$) CCD images spanning 35 years from astronomical data archives. We have successfully identified previously kno
Externí odkaz:
http://arxiv.org/abs/2405.13464
Autor:
Branco, Vinicius, Coelho, Paula R. T., Lançon, Ariane, Martins, Lucimara P., Prugniel, Philippe
Most Galactic Globular Clusters (GCs) harbour multiple populations of stars (MPs), composed of at least two generations: the first characterized by a "standard" $\alpha$-enhanced metal mixture, as observed in field halo stars of the Milky Way, and th
Externí odkaz:
http://arxiv.org/abs/2404.15468
Autor:
Kumar, Nitesh, Bhardwaj, Anupam, Singh, Harinder P., Das, Susmita, Marconi, Marcella, Kanbur, Shashi M., Prugniel, Philippe
We present a new technique to generate the light curves of RRab stars in different photometric bands ($I$ and $V$ bands) using Artificial Neural Networks (ANN). A pre-computed grid of models was used to train the ANN, and the architecture was tuned u
Externí odkaz:
http://arxiv.org/abs/2303.15117
The metallicity spread, or the metallicity trend along the evolutionary sequence of a globular cluster, is a rich source of information to help understand the cluster physics (e.g. multiple populations) and stellar physics (e.g. atomic diffusion). Lo
Externí odkaz:
http://arxiv.org/abs/2203.12685
Recent work has used spectra of about 5000 stars in NGC 6397 that were extracted from a MUSE mosaic to determine the atmospheric parameters for these stars by fitting the spectra against the Goettingen Spectral Library. A significant change in metall
Externí odkaz:
http://arxiv.org/abs/2002.07702
Autor:
Arentsen, Anke, Prugniel, Philippe, Gonneau, Anais, Lançon, Ariane, Trager, Scott, Peletier, Reynier, Lyubenova, Mariya, Chen, Yan-Ping, Barroso, Jesús Falcón, Blázquez, Patricia Sánchez, Vazdekis, Alejandro
Publikováno v:
2019, A&A, 627, A138
The X-shooter Spectral Library (XSL) is an empirical stellar library at medium spectral resolution covering the wavelength range from 3000 \AA to 24 800 \AA. This library aims to provide a benchmark for stellar population studies. In this work, we pr
Externí odkaz:
http://arxiv.org/abs/1907.06391
Context: The full spectrum fitting of stellar spectra against a library of empirical spectra is a well-established approach to measure the atmospheric parameters of FGK stars with a high internal consistency. Extending it towards cooler stars still r
Externí odkaz:
http://arxiv.org/abs/1512.04882
Autor:
Branco, Vinicius, Coelho, Paula R. T., Lançon, Ariane, Martins, Lucimara P., Prugniel, Philippe
Publikováno v:
Astronomy & Astrophysics / Astronomie et Astrophysique; 7/15/2024, Vol. 687, p1-13, 13p
Autor:
Kumar, Nitesh, Bhardwaj, Anupam, Singh, Harinder P, Rejkuba, Marina, Marconi, Marcella, Prugniel, Philippe
Publikováno v:
Monthly Notices of the Royal Astronomical Society; Jul2024, Vol. 531 Issue 3, p2976-2997, 22p
Autor:
Makarov, Dmitry, Prugniel, Philippe, Terekhova, Nataliya, Courtois, Helene, Vauglin, Isabelle
We present the compilation catalogue of redshift-independent distances included in the HyperLEDA database. It is actively maintained to be up-to-date, and the current version counts 6640 distance measurements for 2335 galaxies compiled from 430 publi
Externí odkaz:
http://arxiv.org/abs/1408.3476