Zobrazeno 1 - 10
of 4 449
pro vyhledávání: '"Walker Matthew A"'
Objective: Inclusion of individualised electrical conductivities of head tissues is crucial for the accuracy of electrical source imaging techniques based on electro/magnetoencephalography and the efficacy of transcranial electrical stimulation. Para
Externí odkaz:
http://arxiv.org/abs/2408.15673
Autor:
Chen, Bobby, Chen, Siyu, Dowlatabadi, Jason, Hong, Yu Xuan, Iyer, Vinayak, Mantripragada, Uday, Narang, Rishabh, Pandey, Apoorv, Qin, Zijun, Sheikh, Abrar, Sun, Hongtao, Sun, Jiaqi, Walker, Matthew, Wei, Kaichen, Xu, Chen, Yang, Jingnan, Zhang, Allen T., Zhang, Guoqing
Budget allocation of marketplace levers, such as incentives for drivers and promotions for riders, has long been a technical and business challenge at Uber; understanding lever budget changes' impact and estimating cost efficiency to achieve predefin
Externí odkaz:
http://arxiv.org/abs/2407.19078
Autor:
Vitral, Eduardo, van der Marel, Roeland P., Sohn, Sangmo Tony, Libralato, Mattia, del Pino, Andrés, Watkins, Laura L., Bellini, Andrea, Walker, Matthew G., Besla, Gurtina, Pawlowski, Marcel S., Mamon, Gary A.
Publikováno v:
The Astrophysical Journal, 970:1 (26pp), 2024 July 20
We analyze four epochs of HST imaging over 18 years for the Draco dwarf spheroidal galaxy. We measure precise proper motions (PMs) for hundreds of stars and combine these with existing line-of-sight (LOS) velocities. This provides the first radially-
Externí odkaz:
http://arxiv.org/abs/2407.07769
Autor:
Cristofari, Paul I., Dupree, Andrea K., Milone, Antonino P., Walker, Matthew G., Mateo, Mario, Dotter, Aaron, Bailey III, John I.
We present an analysis of high-resolution optical spectra recorded for 30 stars of the split extended main-sequence turnoff (eMSTO) of the young ($\sim$ 40 Myr) Small Magellanic Cloud (SMC) globular cluster NGC 330. Spectra were obtained with the M2F
Externí odkaz:
http://arxiv.org/abs/2406.10413
We use analytical and $N$-body methods to study the capture of field stars by gravitating substructures moving across a galactic environment. The majority of stars captured by a substructure move on temporarily-bound orbits that are lost to galactic
Externí odkaz:
http://arxiv.org/abs/2404.19069
We present results from simultaneous modeling of 2D (projected along the line of sight) position, proper motion and line-of-sight velocity for \textit{Gaia}- and APOGEE-observed stars near the centre of the Sagittarius (Sgr) dwarf spheroidal galaxy.
Externí odkaz:
http://arxiv.org/abs/2404.16184
Autor:
Garcia, Jonathan Cabrera, Sakari, Charli M., Roederer, Ian U., Evans, Donavon W., Silva, Pedro, Mateo, Mario, Song, Ying-Yi, Kremin, Anthony, Bailey III, John I., Walker, Matthew G.
M15 is a globular cluster with a known spread in neutron-capture elements. This paper presents abundances of neutron-capture elements for 62 stars in M15. Spectra were obtained with the Michigan/Magellan Fiber System (M2FS) spectrograph, covering a w
Externí odkaz:
http://arxiv.org/abs/2403.00063
Autor:
Walker, Matthew G., Caldwell, Nelson, Mateo, Mario, Olszewski, Edward W., Pace, Andrew B., Bailey III, John I., Koposov, Sergey E., Roederer, Ian U.
Publikováno v:
The Astrophysical Journal Supplement Series, 2023, Volume 268, Issue 1, id.19, 40 pp
We present spectroscopic data for 16369 stellar targets within and/or toward 38 dwarf spheroidal galaxies and faint star clusters within the Milky Way halo environment. All spectra come from observations with the multi-object, fiber-fed echelle spect
Externí odkaz:
http://arxiv.org/abs/2312.12738
Publikováno v:
ApJ 968 89 (2024)
A fundamental prediction of the Lambda Cold Dark Matter (LCDM) cosmology is the centrally divergent cuspy density profile of dark matter haloes. Density cusps render CDM haloes resilient to tides, and protect dwarf galaxies embedded in them from full
Externí odkaz:
http://arxiv.org/abs/2311.14798
The Mpemba effect, an example of anomalous thermal relaxations, occurs when a system prepared at a hot temperature overtakes an identical system prepared at a warm temperature and cools down faster to the environment's temperature. We study the Mpemb
Externí odkaz:
http://arxiv.org/abs/2308.04557