Results 41 to 50 of about 222,812 (342)

Origin of chemical and dynamical properties of the Galactic thick disk

, 2011
We adopt a scenario in which the Galactic thick disk was formed by minor merging between the first generation of the Galactic thin disk (FGTD) and a dwarf galaxy about 9 Gyr ago and thereby investigate chemical and dynamical properties of the Galactic ...
Abadi, Allende Prieto, Bekki, Bekki, Bekki, Bensby, Binney, Binney, Brook, Carollo, Chiappini, Chiba, Dierickx, Dinescu, Edvardsson, Frogel, Fuhrmann, Gilmore, Gilmore, Gratton, Huang, Humphreys, Ivezić, Jurić, Karataş, Kazantzidis, Kenji Bekki, Larsen, Larsen, Lee, Loebman, Parker, Prochaska, Reddy, Reddy, Robin, Roškar, Ruchti, Takuji Tsujimoto, Tsujimoto, Tsujimoto, Villalobos, Yoachim, Yoshii   +43 more
core   +1 more source

Thick Disk Planetary Nebulae [PDF]

Proceedings of the International Astronomical Union, 2006
In this work we attempt to find Planetary Nebulae(PNe) belonging to the thick disk population of the Galaxy, based on the proper motion and radial velocity data of the objects available in literature, by using a simulation and Bayesian likelihood analysis.
J.K. Baliga, D.C.V. Mallik
openaire   +1 more source

Formation and Evolution of the Disk System of the Milky Way: [alpha/Fe] Ratios and Kinematics of the SEGUE G-Dwarf Sample

, 2011
We employ measurements of the [alpha/Fe] ratio derived from low-resolution (R~2000) spectra of 17,277 G-type dwarfs from the SEGUE survey to separate them into likely thin- and thick-disk subsamples.
Abadi, Abazajian, Aihara, Allende Prieto, An, An, An, Andreas Just, Bond, Brian Yanny, Brook, Brook, Brook, Carollo, Casetti-Dinescu, Chiba, Constance M. Rockosi, Deokkeun An, Dierickx, Fuhrmann, Gilmore, Girard, Girard, Heather L. Morrison, Helio J. Rocha-Pinto, Ivezić, Jenkins, Jennifer A. Johnson, Jonathan Bird, Kazantzidis, Lee, Lee, Lee, Loebman, Minchev, Munn, Munn, Parker, Paul Harding, Ralph Schönrich, Reddy, Roškar, Roškar, Schlesinger, Sesar, Smolinski, Steinmetz, Timothy C. Beers, Villalobos, Wyse, Yanny, York, Yoshii, Young Sun Lee, Zwitter, Željko Ivezić   +55 more
core   +1 more source

Chemo-orbital evidence from SDSS/SEGUE G dwarf stars for a mixed origin of the Galactic thick disk

EPJ Web of Conferences, 2012
About 13,000 G dwarf within ...
van de Ven G., Liu C.
doaj   +1 more source

The Panchromatic Hubble Andromeda Treasury. XX. The Disk of M31 is Thick

The Astronomical Journal, 2023
We present a new approach to measuring the thickness of a partially face-on stellar disk, using dust geometry. In a moderately-inclined disk galaxy, the fraction of reddened stars is expected to be 50% everywhere, assuming that dust lies in a thin ...
Julianne J. Dalcanton, Eric F. Bell, Yumi Choi, Andrew E. Dolphin, Morgan Fouesneau, Léo Girardi, David W. Hogg, Anil C. Seth, Benjamin F. Williams   +8 more
doaj   +1 more source

Expanding Hereditary Spastic Paraplegias Limits: Biallelic SPAST Variants in Cerebral Palsy Mimics

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Hereditary spastic paraplegias (HSP) are rare neurodegenerative disorders marked by spasticity and lower limb weakness. The most common type, SPG4, is usually autosomal dominant and caused by SPAST gene variants, typically presenting as pure HSP.
Gregorio A. Nolasco, Mònica Roldán, Yalda Jamshidi, Ioannis Georvasilis, Rocío Jadraque Rodríguez, Reza Boostani, Ali Shoeibi, Lluís Armengol, Anna Codina, Ehsan Ghayoor Karimiani, Cristina Hernando‐Davalillo, Loreto Martorell, María Luisa Ramírez Almaraz, Jordi Muchart, Carlos Ortez, Andrés Nascimento, Roser Urreizti, Daniel Natera‐de Benito, Mercedes Serrano   +18 more
wiley   +1 more source

Unveiling a Young Thick Disk in the Milky Way

The Astrophysical Journal Letters
The thickness of a galaxy’s disk provides a valuable probe of its formation and evolution history. Observations of the Milky Way and local galaxies have revealed an ubiquitous disk structure with two distinctive components: an old thick disk and a ...
Jianhui Lian, Min Du, Shuai Lu, Bingqiu Chen, Gail Zasowski, Zhaoyu Li, Xiaojie Liao, Chao Liu   +7 more
doaj   +1 more source

Observation of Disk Scattering Slab Modes Transitioning to Disk Scattering Modes on Metal–Dielectric Heterostructures in the Terahertz Waveband

IEEE Photonics Journal, 2015
It has been demonstrated that, in the terahertz (THz) waveband, disk scattering slab modes (DSSMs) can exist in a heterostructure composed of a metallic subwavelength disk array coated on one surface of a dielectric slab.
Wei Wang, Jinsong Liu, Kejia Wang, Zhengang Yang, Kefei Ye   +4 more
doaj   +1 more source

Red Thick Disks of Nearby Galaxies [PDF]

The Astronomical Journal, 2005
Edge on systems reveal the properties of disk galaxies as a function of height, z, above the plane. Four local edge-on galaxies, that are close enough to have been resolved into stars by the Hubble Space Telescope, show thick disks, composed of a red stellar population, which is old and relatively metal rich.
openaire   +3 more sources

Lessons Learned: Quality Analysis of Optical Coherence Tomography in Neuromyelitis Optica

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Introduction Optical coherence tomography (OCT)‐derived retina measurements are markers for neuroaxonal visual pathway status. High‐quality OCT scans are essential for reliable measurements, but their acquisition is particularly challenging in eyes with severe visual impairment, as often observed in neuromyelitis optica spectrum disorders ...
Hadi Salih, Sara Samadzadeh, Charlotte Bereuter, Seyedamirhosein Motamedi, Claudia Chien, Pablo Villoslada, Hadas Stiebel‐Kalish, Nasrin Asgari, Yang Mao‐Draayer, Marius Ringelstein, Joachim Havla, Marco Aurélio Lana Peixoto, Ho Jin Kim, Jacqueline Palace, Maria Isabel Leite, Srilakshmi M. Sharma, Fereshteh Ashtari, Rahele Kafieh, Lekha Pandit, Orhan Aktas, Philipp Albrecht, Letizia Leocani, Itay Lotan, Sasitorn Siritho, Jérôme de Seze, Romain Marignier, Caroline Froment Tilikete, Denis Bernardi Bichuetti, Ivan Maynart Tavares, Ayse Altintas, Anu Jacob, Saif Huda, Ibis Soto de Castillo, Lawrence J. Cook, Michael R. Yeaman, Axel Petzold, Alexander U. Brandt, Friedemann Paul, Frederike C. Oertel, Hanna G. Zimmermann, with the Guthy Jackson Charitable Foundation—International Clinical Consortium and CROCTINO Collaborators   +40 more
wiley   +1 more source