Results 91 to 100 of about 30,171 (324)

ON THE SHOULDERS OF GIANTS: PROPERTIES OF THE STELLAR HALO AND THE MILKY WAY MASS DISTRIBUTION [PDF]

The Astrophysical Journal, 2014
Accepted for publication in ...
Joss Bland-Hawthorn, Prajwal R. Kafle, Prajwal R. Kafle, Sanjib Sharma, Geraint F. Lewis   +4 more
openaire   +4 more sources

Testing two alternatives theories to dark matter with the Milky Way dynamics

, 2015
Two alternative theories to dark matter are investigated by testing their ability to describe consistently the dynamics of the Milky Way. The first one refers to a modified gravity theory having a running gravitational constant and the second assumes ...
de Oliveira, P. L. C., Pacheco, J. A. de Freitas, Reinisch, G.   +2 more
core   +1 more source

Elemental Abundances in M31: Alpha and Iron Element Abundances from Low-Resolution Resolved Stellar Spectroscopy in the Stellar Halo [PDF]

, 2019
Measurements of [Fe/H] and [$\alpha$/Fe] can probe the minor merging history of a galaxy, providing a direct way to test the hierarchical assembly paradigm.
Cunningham, Emily C., Escala, Ivanna, Gilbert, Karoline M., Kirby, Evan N., Wojno, Jennifer   +4 more
core   +3 more sources

Cat‐Vibrissa‐Inspired Biomass Fiber Aerogels for Flexible and Highly Sensitive Sensors in Monitoring Human Sport

Advanced Functional Materials, EarlyView.
Inspired by cat vibrissae, biomimetic biomass PHFs/SA aerogels (BFAs) are developed via precursor‐assisted in situ polymerization and freeze‐synergistic assembly. These ultralight, porous pressure sensors exhibit high sensitivity and excellent durability, enabling pulse detection, handwriting recognition, Morse code transmission, and notably real‐time ...
Dandan Xie, Ziwei Chen, Daoxiong Qian, Jian Shi, Wei Zhang, Hideaki Morikawa, Chunhong Zhu   +6 more
wiley   +1 more source

Building up the Stellar Halo of the Milky Way

, 1998
We study numerical simulations of satellite galaxy disruption in a potential resembling that of the Milky Way. Our goal is to assess whether a merger origin for the stellar halo would leave observable fossil structure in the phase-space distribution of nearby stars.
Helmi, Amina, White, Simon D. M.
openaire   +2 more sources

Chemical fingerprinting of stellar populations in the Milky Way halo [PDF]

Proceedings of the International Astronomical Union, 2012
AbstractThe idea of “chemically fingerprinting“ stars to their birth systems has been discussed over the last decade. Here we present an investigation of the chemical abundance patterns of halo substructures using high-resolution spectra. In particular, we study the abundances of the α-like element titanium (Ti) and the s-process elements yttrium (Y ...
openaire   +2 more sources

The Gaia-ESO Survey: the selection function of the Milky Way field stars [PDF]

, 2016
The Gaia-ESO Survey was designed to target all major Galactic components (i.e., bulge, thin and thick discs, halo and clusters), with the goal of constraining the chemical and dynamical evolution of the Milky Way.
Bensby, T., Bragaglia, A., Casey, A. R., Costado, M. T., Feltzing, S., Franciosini, E., Gilmore, G., Hourihane, A., Howes, L. M., Jofre, P., Koposov, S. E., Kordopatis, G., Korn, A. J., Lanzafame, A. C., Lardo, C., Lewis, J., Magrini, L., Monaco, L., Morbidelli, L., Pancino, E., Randich, S., Ruchti, G. R., Sacco, G. G., Sbordone, L., Smiljanic, R., Stonkute, E., Tautvaisiene, G., Worley, C. C., Zwitter, T.   +28 more
core   +4 more sources

At‐Home Early Diagnosis of Mastitis: Calibration‐Free Analysis of Sodium to Potassium Ratio in Breast Milk

Advanced Functional Materials, EarlyView.
MAMAWEL is introduced as the first calibration‐free potentiometric sensor for at‐home mastitis diagnosis. By measuring the sodium‐to‐potassium ratio in breast milk, the device reliably differentiates between healthy and mastitis‐affected samples with less than 10% error.
Ali Soleimani, Farbod Amirghasemi, Melissa Banks, Abdulrahman Al‐Shami, Sina Khazaee Nejad, Abdalrhman Sheer, Clare Dominique Sanchez, Haozheng Ma, Daniel Vargas Ramos, Maral P.S. Mousavi   +9 more
wiley   +1 more source

Alpha Element Populations Among Local Halo Stars

The Astronomical Journal, 2023
Previous studies have shown that the halo of the Milky Way galaxy is made up of two distinct stellar populations, one from dissipative collapse and the other accreted.
Michael V. Reinhard, John B. Laird
doaj   +1 more source

Lambda-Cold Dark Matter, Stellar Feedback, and the Galactic Halo Abundance Pattern [PDF]

, 2005
(Abridged) The hierarchical formation scenario for the stellar halo requires the accretion and disruption of dwarf galaxies, yet low-metallicity halo stars are enriched in alpha-elements compared to similar, low-metallicity stars in dwarf spheroidal ...
Andreea S. Font, Bondi H., Brant Robertson, Devriendt J. E. G., Gratton R. G., Gratton R. G., Gratton R. G., Greggio L., Hill V., Hill V., Hill V., Hill V., James S. Bullock, Jasniewicz G., Kathryn V. Johnston, Lacey C., Lars Hernquist, Matteucci F., Matteucci F., Matteucci F., Moore B., Nissen P. E., Pagel B. E. J., Schaller G., Tinsley B. M., Tinsley B. M., Tsujimoto T., Unavane M.   +27 more
core   +2 more sources