Results 51 to 60 of about 73,308 (215)

The Imprint of Clump Formation at High Redshift. II. The Chemistry of the Bulge

open access: yesThe Astrophysical Journal, 2023
In Paper I, we showed that clumps in high-redshift galaxies, having a high star formation rate density (Σ _SFR ), produce disks with two tracks in the [Fe/H]–[ α /Fe] chemical space, similar to that of the Milky Way’s (MW’s) thin+thick disks.
Victor P. Debattista   +13 more
doaj   +1 more source

Multiple Stellar Populations in the Globular Cluster omega Centauri as Tracers of a Merger Event

open access: yes, 1999
The discovery of the Sagittarius dwarf galaxy, which is being tidally disrupted by and merging with the Milky Way, supports the view that the halo of the Galaxy has been built up at least partially by the accretion of similar dwarf systems.
A Sarajedini   +15 more
core   +1 more source

Evaluating Trans‐Fatty Acids Labelling in Packaged Foods Sold in Brazil Before and After National Policy Changes

open access: yesJournal of Human Nutrition and Dietetics, Volume 39, Issue 3, June 2026.
ABSTRACT Introduction The elimination of industrial trans‐fatty acids (i‐TFA) is a global public health priority. In Brazil, food regulatory changes were implemented in 2012, limiting the use of TFA‐free claims and in 2019, restricting i‐TFA content in food. This study analysed i‐TFA declarations on labels of packaged foods sold in Brazil in 2010, 2013
Beatriz Vasconcellos de Barros   +9 more
wiley   +1 more source

A Galactic Self-portrait: Density Structure and Integrated Properties of the Milky Way Disk

open access: yesThe Astrophysical Journal
The evolutionary history of the Milky Way disk is imprinted in the ages, positions, and chemical compositions of individual stars. In this study, we derive the intrinsic density distribution of different stellar populations using the final data release ...
Julie Imig   +25 more
doaj   +1 more source

Wormhole in the Milky Way galaxy with global monopole charge

open access: yesEuropean Physical Journal C: Particles and Fields, 2022
Wormholes are tunnels or short-cuts in space-time, and their existence is very important for human civilization to express the vastness of space and time. So, it is necessary to analyze our own Milky Way galaxy if it can harbour any wormhole.
Priyam Das, Mehedi Kalam
doaj   +1 more source

A low pre-infall mass for the Carina dwarf galaxy from disequilibrium modelling [PDF]

open access: yes, 2015
Dark matter only simulations of galaxy formation predict many more subhalos around a Milky Way like galaxy than the number of observed satellites. Proposed solutions require the satellites to inhabit dark matter halos with masses between one to ten ...
Read, Justin I.   +3 more
core   +2 more sources

The mass of the Milky Way Galaxy [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1992
We present a method for determining the Galactic mass and mass distribution based on maximum likelihood parameter estimation. We show that the number density of the Galaxy's outer satellites can be modelled by a power-law function. Assuming that the total distribution of matter (visible and dark) can be modelled in a similar way, we construct a self ...
Andrew S. Kulessa, D. Lynden-Bell
openaire   +1 more source

Four-hundred Very Metal-poor Stars Studied with LAMOST and Subaru. III. Dynamically Tagged Groups and Chemodynamical Properties

open access: yesThe Astrophysical Journal
Very metal-poor (VMP) stars record the signatures of early accreted galaxies, making them essential tools for unraveling the early stages of Galaxy formation.
Ruizhi Zhang   +11 more
doaj   +1 more source

Impact of the low solar abundance on the ages of globular clusters

open access: yes, 2010
We present the result of our investigation on the impact of the low Solar abundance of Asplund and collaborators (2004) on the derived ages for the oldest star clusters based on isochrone fittings. We have constructed new stellar models and corresponding
Kim, Yong -Cheol, Yi, Sukyoung K.
core   +1 more source

The [?/Fe] ratios of very metal-poor stars within the integrated galactic initial mass function theory [PDF]

open access: yes, 2013
The aim of this paper is to quantify the amplitude of the predicted plateau in [α/Fe] ratios associated with the most metal-poor stars of a galaxy. We assume that the initial mass function (IMF) in galaxies is steeper if the star formation rate (SFR) is ...
Calura, F.   +3 more
core   +2 more sources

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