Results 1 to 10 of about 225,051 (342)

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   +5 more sources

Chemical constraints on the formation of the Galactic thick disk [PDF]

EPJ Web of Conferences, 2012
We highlight some results from our detailed abundance analysis study of 703 kinematically selected F and G dwarf stars in the solar neighbourhood. The analysis is based on spectra of high-resolution (R = 45000 to 110 000) and high signal-to-noise (S/N ...
Feltzing S., Bensby T.
doaj   +2 more sources

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

, 2005
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
Binggeli B., Buser R., de Grijs R., de Grijs R., Fuhrmann K., Gilmore G., Julianne J. Dalcanton, Karachentsev I. D., Karachentsev I. D., Kudrya Y. N., Pagel B. E. J., Peter Yoachim, Pohlen M., Robin A. C., Shaw M. A., Staveley-Smith L., van der Kruit P. C., van der Kruit P. C., van der Kruit P. C., van der Kruit P. C., van Dokkum P. G.   +20 more
core   +2 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
core   +13 more sources

The Thick Disk in the Galaxy NGC 4244 from S^4G Imaging [PDF]

, 2010
If thick disks are ubiquitous and a natural product of disk galaxy formation and/or evolution processes, all undisturbed galaxies that have evolved during a significant fraction of a Hubble time should have a thick disk. The late-type spiral galaxy NGC
Athanassoula, E., Bosma, Albert, Buta, Ronald J., Comerón, Sébastien, Elmegreen, Bruce G., Gil de Paz, Armando, Hinz, Joannah L., Ho, Luis C., Holwerda, Benne W., Kim, Taehyun, Knapen, Johan H., Laurikainen, Eija, Menéndez-Delmestre, Karín, Muñoz-Mateos, Juan-Carlos, Regan, Michael W., Salo, Heikki, Schinnerer, Eva, Seibert, Mark, Sheth, Kartik   +18 more
core   +7 more sources

Project AMIGA: The Inner Circumgalactic Medium of Andromeda from Thick Disk to Halo

The Astrophysical Journal
The inner circumgalactic medium (CGM) of galaxies, where disk and halo processes intersect, remains poorly characterized despite its critical role in regulating galaxy evolution.
Nicolas Lehner, J. Christopher Howk, Lucy Collins, Sameer, Bart P. Wakker, Ramona Augustin, Kathleen A. Barger, Michelle A. Berg, Rongmon Bordoloi, Thomas M. Brown, Frances H. Cashman, Claude-André Faucher-Giguère, Andrew J. Fox, David M. French, Karoline M. Gilbert, Puragra Guhathakurta, John M. O’Meara, Brian W. O’Shea, Molly S. Peeples, D. J. Pisano, J. Xavier Prochaska, Jonathan Stern, Jason Tumlinson, Jessica K. Werk, Benjamin F. Williams   +24 more
doaj   +2 more sources

Non-LTE Sodium Abundance in Galactic Thick- and Thin-Disk Red Giants [PDF]

, 2014
We evaluate non-local thermodynamical equilibrium (non-LTE) line formation for neutral sodium in model atmospheres of the 79 red giants using the model atom that incorporates the best available atomic data.
Alexeeva, S. A., Mashonkina, L. I., Pakhomov, Yu. V.   +2 more
core   +2 more sources

Oxygen in the Galactic thin and thick disks [PDF]

, 2002
First results from a study into the abundance trends of oxygen in the Galactic thin and thick disks are presented. Oxygen abundances for 21 thick disk and 42 thin disk F and G dwarf stars based on very high resolution spectra (R\sim 215000) and high ...
Bensby, T., Feltzing, S., Lundstrom, I.
core   +4 more sources

Comparison of magnetized thick disks around black holes and boson stars [PDF]

European Physical Journal C: Particles and Fields
Boson stars are considered as promising candidates for black hole mimickers. Similar to other compact objects they can form accretion disks around them.
Kristian Gjorgjieski, Jutta Kunz, Petya Nedkova   +2 more
doaj   +2 more sources

Vertical Density Distribution of the Galaxy from Star Count Analysis [PDF]

Journal of Astronomy and Space Sciences, 2002
The five space density distribution D(z) with distance perpendicular to the Galactic plane were combined. The scale heights and the local densities at z = 0 of the thin disk, thick disk, and the halo components were estimated from the nonlinear least ...
Young-Jong Sohn
doaj   +1 more source