Zobrazeno 1 - 10
of 7 562
pro vyhledávání: '"Hansen, A J"'
Autor:
Lim, Dongwook, Chun, Sang-Hyun, Lee, Young-Wook, Chung, Chul, Koch-Hansen, Andreas J., Hong, Seungsoo
Context. With the increasing number of discoveries of globular clusters in the inner Milky Way, the need for spectroscopic confirmation and further investigation of their stellar populations and chemodynamical properties has become crucial. Aims. Gra
Externí odkaz:
http://arxiv.org/abs/2410.21578
Autor:
Dimoff, A. J., Hansen, C. J., Stancliffe, R. J., Kubatova, B., Stateva, I., Kucinskas, A., Dobrovolskas, V.
Publikováno v:
A&A 691, A128 (2024)
Around half of the heavy elements in the universe are formed through the slow neutron capture (s-) process, which takes place in thermally pulsing asymptotic giant branch (AGB) stars with masses $1-6\;M_{\odot}$. The nucleosynthetic imprint of the s-
Externí odkaz:
http://arxiv.org/abs/2409.16761
Autor:
MANTA Collaboration, Rutherford, G., Wilson, H. S., Saltzman, A., Arnold, D., Ball, J. L., Benjamin, S., Bielajew, R., de Boucaud, N., Calvo-Carrera, M., Chandra, R., Choudhury, H., Cummings, C., Corsaro, L., DaSilva, N., Diab, R., Devitre, A. R., Ferry, S., Frank, S. J., Hansen, C. J., Jerkins, J., Johnson, J. D., Lunia, P., van de Lindt, J., Mackie, S., Maris, A. D., Mandell, N. R., Miller, M. A., Mouratidis, T., Nelson, A. O., Pharr, M., Peterson, E. E., Rodriguez-Fernandez, P., Segantin, S., Tobin, M., Velberg, A., Wang, A. M., Wigram, M., Witham, J., Paz-Soldan, C., Whyte, D. G.
The MANTA (Modular Adjustable Negative Triangularity ARC-class) design study investigated how negative-triangularity (NT) may be leveraged in a compact, fusion pilot plant (FPP) to take a ``power-handling first" approach. The result is a pulsed, radi
Externí odkaz:
http://arxiv.org/abs/2405.20243
Autor:
François, P., Cescutti, G., Bonifacio, P., Caffau, E., Monaco, L., Steffen, M., Puschnig, J., Calura, F., Cristallo, S., Di Marcantonio, P., Dobrovolskas, V., Franchini, M., Gallagher, A. J., Hansen, C. J., Korn, A., Kuvinskas, A., Lallement, R., Lombardo, L., Lucertini, F., Magrini, L., Pinto, A. M. Matas, Matteucci, F., Mucciarelli, A., Sbordone, L., Spite, M., Spitoni, E., Valentini, M.
The MINCE (Measuring at Intermediate metallicity Neutron-Capture Elements) project aims to gather the abundances of neutron-capture elements but also of light elements and iron peak elements in a large sample of giant stars in this metallicity range.
Externí odkaz:
http://arxiv.org/abs/2404.08418
We present a new set of tools to derive systemic velocities for single-mode RR~Lyrae stars from visual and near-infrared spectra. We derived scaling relations and line-of-sight velocity templates using both APOGEE and {\it Gaia} spectroscopic product
Externí odkaz:
http://arxiv.org/abs/2404.05279
Autor:
Medina, Gustavo E., Muñoz, Ricardo R., Carlin, Jeffrey L., Vivas, A. Katherina, Grebel, Eva K., Martínez-Vázquez, Clara E., Hansen, Camilla J.
In order to constrain the evolutionary history of the Milky Way, we hunt for faint RR Lyrae stars (RRLs) using Dark Energy Camera data from the High cadence Transient Survey (HiTS) and the Halo Outskirts With Variable Stars (HOWVAST) survey. We repor
Externí odkaz:
http://arxiv.org/abs/2402.14055
Autor:
Pourkamali-Anaraki, Farhad, Nasrin, Tahamina, Jensen, Robert E., Peterson, Amy M., Hansen, Christopher J.
A pivotal aspect in the design of neural networks lies in selecting activation functions, crucial for introducing nonlinear structures that capture intricate input-output patterns. While the effectiveness of adaptive or trainable activation functions
Externí odkaz:
http://arxiv.org/abs/2402.05401
Autor:
Butler, Evan, Kunder, Andrea, Prudil, Zdenek, Covey, Kevin R., Ball, Macy, Campos, Carlos, Gollnick, Kaylen, Carvajal, Julio Olivares, Hughes, Joanne, Devine, Kathryn, Johnson, Christian I., Vivas, A. Katherina, Rich, Michael R., Joyce, Meridith, Simon, Iulia T., Marchetti, Tommaso, Koch-Hansen, Andreas J., Clarkson, William I., Kuss, Rebekah
Patchick 99 is a candidate globular cluster located in the direction of the Galactic bulge, with a proper motion almost identical to the field and extreme field star contamination. A recent analysis suggests it is a low-luminosity globular cluster wi
Externí odkaz:
http://arxiv.org/abs/2401.13825
Autor:
Schmidt, Philip, Claessen, Remi, Higgins, Gerard, Hofer, Joachim, Hansen, Jannek J., Asenbaum, Peter, Uhl, Kevin, Kleiner, Reinhold, Gross, Rudolf, Huebl, Hans, Trupke, Michael, Aspelmeyer, Markus
Publikováno v:
Phys. Rev. Applied 22 (2024) 014078
We present a cavity-electromechanical system comprising a superconducting quantum interference device which is embedded in a microwave resonator and coupled via a pick-up loop to a 6 $\mu$g magnetically-levitated superconducting sphere. The motion of
Externí odkaz:
http://arxiv.org/abs/2401.08854
The elemental abundances between strontium and silver ($Z = 38-47$) observed in the atmospheres of very metal-poor stars (VMP) in the Galaxy may contain the fingerprint of the weak $r$-process and $\nu p$-process occurring in early core-collapse supe
Externí odkaz:
http://arxiv.org/abs/2312.12306