Zobrazeno 1 - 10
of 897
pro vyhledávání: '"Wehrhahn, A."'
Autor:
Boldt-Christmas, Linn, Lesjak, Fabio, Wehrhahn, Ansgar, Piskunov, Nikolai, Rains, Adam D., Nortmann, Lisa, Kochukhov, Oleg
When observing the atmospheres of transiting exoplanets using high-resolution spectroscopy, one aims to detect well-resolved spectral features with high signal-to-noise ratios (SNR) as is possible today with modern spectrographs. However, obtaining s
Externí odkaz:
http://arxiv.org/abs/2312.08320
Autor:
Dorn, R. J., Bristow, P., Smoker, J. V., Rodler, F., Lavail, A., Accardo, M., Ancker, M. van den, Baade, D., Baruffolo, A., Courtney-Barrer, B., Blanco, L., Brucalassi, A., Cumani, C., Follert, R., Haimerl, A., Hatzes, A., Haug, M., Heiter, U., Hinterschuster, R., Hubin, N., Ives, D. J., Jung, Y., Jones, M., Kirchbauer, J-P., Klein, B., Kochukhov, O., Korhonen, H. H., Köhler, J., Lizon, J-L., Moins, C., Molina-Conde, I., Marquart, T., Neeser, M., Oliva, E., Pallanca, L., Pasquini, L., Paufique, J., Piskunov, N., Reiners, A., Schneller, D., Schmutzer, R., Seemann, U., Slumstrup, D., Smette, A., Stegmeier, J., Stempels, E., Tordo, S., Valenti, E., Valenzuela, J. J., Vernet, J., Vinther, J., Wehrhahn, A.
Publikováno v:
A&A 671, A24 (2023)
The CRyogenic InfraRed Echelle Spectrograph (CRIRES) Upgrade project CRIRES$^{+}$ extended the capabilities of CRIRES. It transformed this VLT instrument into a cross-dispersed spectrograph to increase the wavelength range that is covered simultaneou
Externí odkaz:
http://arxiv.org/abs/2301.08048
Publikováno v:
A&A 671, A171 (2023)
The characterization of exoplanet requires reliable determination of the fundamental parameters of their host stars. Spectral fitting plays an important role in this process. For the majority of stellar parameters matching synthetic spectra to the ob
Externí odkaz:
http://arxiv.org/abs/2210.04755
Autor:
Lind, K., Nordlander, T., Wehrhahn, A., Montelius, M., Osorio, Y., Barklem, P. S., Afsar, M., Sneden, C., Kobayashi, C.
Publikováno v:
A&A 665, A33 (2022)
It is well known that cool star atmospheres depart from local thermodynamic equilibrium (LTE). Accurate abundance determination requires taking those effects into account, but the necessary non-LTE calculations are often lacking. Our goal is to provi
Externí odkaz:
http://arxiv.org/abs/2206.11070
We discuss Bayesian nonparametric procedures for the regression analysis of compositional responses, that is, data supported on a multivariate simplex. The procedures are based on a modified class of multivariate Bernstein polynomials and on the use
Externí odkaz:
http://arxiv.org/abs/2108.13403
Autor:
Paganin, Sally, Paciorek, Christopher J., Wehrhahn, Claudia, Rodriguez, Abel, Rabe-Hesketh, Sophia, de Valpine, Perry
Item response theory (IRT) models typically rely on a normality assumption for subject-specific latent traits, which is often unrealistic in practice. Semiparametric extensions based on Dirichlet process mixtures offer a more flexible representation
Externí odkaz:
http://arxiv.org/abs/2101.11583
Autor:
Amarsi, A. M., Lind, K., Osorio, Y., Nordlander, T., Bergemann, M., Reggiani, H., Wang, E. X., Buder, S., Asplund, M., Barklem, P. S., Wehrhahn, A., Skúladóttir, Á., Kobayashi, C., Karakas, A. I., Gao, X. D., Bland-Hawthorn, J., De Silva, G. M., Kos, J., Lewis, G. F., Martell, S. L., Sharma, S., Simpson, J. D., Zucker, D. B., Čotar, K., Horner, J., collaboration, the GALAH
Publikováno v:
A&A 642, A62 (2020)
Massive sets of stellar spectroscopic observations are rapidly becoming available and these can be used to determine the chemical composition and evolution of the Galaxy with unprecedented precision. One of the major challenges in this endeavour invo
Externí odkaz:
http://arxiv.org/abs/2008.09582
Publikováno v:
A&A 646, A32 (2021)
The price of instruments and observing time on modern telescopes is quickly increasing with the size of the primary mirror. Therefore, it is worth revisiting the data reduction algorithms to extract every bit of scientific information from observatio
Externí odkaz:
http://arxiv.org/abs/2008.05827
Autor:
Wehrhahn, Claudia, Fuentes-García, Ruth, Mena, Ramsés H., Leisen, Fabrizio, González-Villalpando, Maria Elena, González-Villalpando, Clicerio
Cardiovascular disease lead the cause of death world wide and several studies have been carried out to understand and explore cardiovascular risk markers in normoglycemic and diabetic populations. In this work, we explore the association structure be
Externí odkaz:
http://arxiv.org/abs/2007.11700
Publikováno v:
Environ Ecol Stat 28 (2021) 355-381
Detection heterogeneity is inherent to ecological data, arising from factors such as varied terrain or weather conditions, inconsistent sampling effort, or heterogeneity of individuals themselves. Incorporating additional covariates into a statistica
Externí odkaz:
http://arxiv.org/abs/2007.10163