Results 1 to 10 of about 222,812 (342)

Structural Parameters of Thin and Thick Disks in Edge-on Disk Galaxies [PDF]

The Astronomical Journal, 2006
We analyze the global structure of 34 late-type, edge-on, undisturbed, disk galaxies spanning a wide range of mass. We measure structural parameters for the galaxies using two-dimensional least-squares fitting to our $R$-band photometry. The fits require
Peter Yoachim, Julianne J. Dalcanton
core   +5 more sources

MAPPING THE ASYMMETRIC THICK DISK. II. DISTANCE, SIZE, AND MASS OF THE HERCULES THICK DISK CLOUD [PDF]

The Astronomical Journal, 2011
The Hercules Thick Disk Cloud (Larsen et al. 2008) was initially discovered as an excess in the number of faint blue stars between quadrants 1 and 4 of the Galaxy.
Jeffrey A. Larsen, Juan E. Cabanela, Roberta M. Humphreys   +2 more
core   +5 more sources

Thick-disk evolution induced by the growth of an embedded thin disk [PDF]

The Astrophysical Journal, 2010
We perform collisionless N-body simulations to investigate the evolution of the structural and kinematical properties of simulated thick disks induced by the growth of an embedded thin disk.
Amina Helmi, Ardi, Barnes, Barnes, Baugh, Belokurov, Binney, Bournaud, Buitrago, Bullock, Buser, Callegari, Chiba, Elmegreen, Ferguson, Ferguson, Font, Gauthier, Girard, Hayashi, Hopkins, Huang, Ibata, Ibata, Ivezić, Jurić, Kalirai, Kazantzidis, Kazantzidis, Kazantzidis, Kazantzidis, Majewski, Malin, Martínez-Delgado, Matthews, Mayer, Navarro, Newberg, Peng, Purcell, Sellwood, Shang, Sharma, Stadel, Stelios Kazantzidis, Tormen, Vitvitska, White, Yanny, Yoachim, Yoachim, Zeldovich, Álvaro Villalobos   +52 more
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Mapping the Asymmetric Thick Disk: The Hercules Thick Disk Cloud [PDF]

The Astrophysical Journal, 2008
The stellar asymmetry of faint thick disk/inner halo stars in the first quadrant first reported by Larsen & Humphreys (1996) and investigated further by Parker et al. (2003, 2004) has been recently confirmed by SDSS (Juric et al. 2008).
Abadi, Belokurov, Jeffrey A. Larsen, Juan E. Cabanela, Jurić, Larsen, Larsen, Parker, Parker, Roberta M. Humphreys, Schlegel   +10 more
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Milky Way's Thick and Thin disk: Is there distinct thick disk? [PDF]

Astronomische Nachrichten, 2016
This article is based on our discussion session on Milky Way models at the 592 WE-Heraeus Seminar, Reconstructing the Milky Way's History: Spectroscopic Surveys, Asteroseismology and Chemodynamical models. The discussion focused on the following question:
Chiappini, C., Kawata, D.
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On the Formation of Planets in the Milky Way’s Thick Disk [PDF]

The Astrophysical Journal
Exoplanet demographic surveys have revealed that close-in (≲1 au) small planets orbiting stars in the Milky Way’s thick disk are ∼50% less abundant than those orbiting stars in the Galactic thin disk.
Tim Hallatt, Eve J. Lee
doaj   +2 more sources

On the Significance of the Thick Disks of Disk Galaxies

The Astrophysical Journal Supplement Series
Thick disks are a prevalent feature observed in numerous disk galaxies, including our own Milky Way. Their significance has been reported to vary widely, ranging from a few percent to 100% of the disk mass, depending on the galaxy and the measurement ...
Sukyoung K. Yi, J. K. Jang, Julien Devriendt, Yohan Dubois, San Han, Taysun Kimm, Katarina Kraljic, Minjung Park, Sebastien Peirani, Christophe Pichon, Jinsu Rhee   +10 more
doaj   +5 more sources

Thick disk kinematics from RAVE and the solar motion [PDF]

EPJ Web of Conferences, 2012
We present a method to derive kinematic parameters for the Galactic thick disk based on stellar radial velocity data alone, without previous knowledge of distances.
Pasetto S., Grebel E.K.
doaj   +3 more sources

Axisymmetric elasticity solution for an undrained saturated poro-piezoelastic thick disk [PDF]

Theoretical and Applied Mechanics, 2019
In this paper, a circular thick plate made of poroelastic piezoelectric ceramic is studied. The porosities of the plate vary through the thickness and axisymmetric behavior of a piezoelectric disk exhibiting hexagonal material symmetry of class 6 mm ...
Abjadi Ali, Jabbari Mohsen, Khorshidvand Reza Ahmad   +2 more
doaj   +2 more sources

Characterisation of the Galactic thick disk [PDF]

Proceedings of the International Astronomical Union, 2013
Thick disks appear to be common in external large spiral galaxies and our own Milky Way also hosts one. The existence of a thick disk is possibly directly linked to the formation history of the host galaxy and if its properties is known it can constrain ...
Bensby, Thomas
core   +2 more sources