Results 81 to 90 of about 126,365 (213)

MHD Simulation in Galactic Center Region with Radiative Cooling and Heating

The Astrophysical Journal
We investigate the role of magnetic field on the gas dynamics in a galactic bulge region by three-dimensional simulations with radiative cooling and heating.
Kensuke Kakiuchi, Takeru. K. Suzuki, Shu-ichiro Inutsuka, Tsuyoshi Inoue, Jiro Shimoda   +4 more
doaj   +1 more source

Galactic bulges: overview [PDF]

Proceedings of the International Astronomical Union, 2007
AbstractThis overview of galactic bulges begins with a discussion of the various kinds of bulges (classical, boxy/peanut-shaped, pseudo) and their likely formation mechanisms. Other specific topics include the Galactic bar/bulge and its chemical evolution, the bulge of M31, the relation between bulges and metal-poor halos (often lumped together as ...
openaire   +1 more source

Rotation of the Galactic bulge

The Astrophysical Journal, 1992
We present results from spectroscopic observations of K giants in two fields towards the Galactic bulge. The mean Galactocentric velocity and velocity dispersion for a field at l, b=(8,7) are =45±10 km s −1 and σ=85±7 km s −1 . For a field at l, b=(12,3) we find =77±9 km s −1 and σ=68±6 km s −1 . The bulge of the Galaxy is found to be rotating, and
Dante Minniti, Simon D. M. White, Edward W. Olszewski, John M. Hill   +3 more
openaire   +1 more source

OGLE-2014-BLG-1760: A Jupiter–Sun Analogue Residing in the Galactic Bulge

The Astronomical Journal
We present the analysis of OGLE-2014-BLG-1760, a planetary system in the galactic bulge. We combine Keck Adaptive Optics follow-up observations in K -band with re-reduced light-curve data to confirm the source and lens star identifications and stellar ...
Natalia E. Rektsini, Clément Ranc, Naoki Koshimoto, Jean-Philippe Beaulieu, David P. Bennett, Andrew A. Cole, Sean K. Terry, Aparna Bhattacharya, Étienne Bachelet, Ian A. Bond, Andrzej Udalski, Joshua W. Blackman, Aikaterini Vandorou, Thomas J. Plunkett, Jean-Baptiste Marquette   +14 more
doaj   +1 more source

A puzzle involving galactic bulge microlensing events [PDF]

, 2010
We study a sample of 16 microlensed Galactic bulge main-sequence turnoff region stars for which high-dispersion spectra have been obtained with detailed abundance analyses.
Feltzing, S., Bensby, T, Judith G. Cohen, Ian B. Thompson, Gould, A, Cohen, Judith G, Feltzing, Sofia, Johnson, J.A., Martin Asplund, Thompson, A.B., Lucatello, Sara, Andrew Gould, Asplund, M., Feltzing, Sophia, Sofia Feltzing, Gould, A., Cohen, J., Johnson, Jennifer A., Bensby, T., Cohen, J.G., Thompson, Ian, Gould, Andrew, Bensby, Thomas,, Thompson, Ian B., Jorge Meléndez, Huang, W., Johnson, J., Thompson, I., Cohen, Judith G., Thomas Bensby, Huang, Wenjin, Melendez, Jorge, Sara Lucatello, Bensby, Thomas, Wenjin Huang, Asplund, Martin, Lucatello, S., Feltzing, Sofia,, Jennifer A. Johnson, Meléndez, J., Johnson, Jennifer A   +40 more
core   +1 more source

The Velocity-Dependent $J$-factor of the Milky Way Halo: Does What Happens in the Galactic Bulge Stay in the Galactic Bulge?

, 2022
We consider the angular distribution of the photon signal which could arise from velocity-dependent dark matter annihilation within the Galactic bulge.
Runburg, Jack, Kumar, Jason, Kiriu, Kenny   +2 more
core   +1 more source

Light-curve Recovery with Rubin-LSST. II. Unveiling the Darkness of the Galactic Bulge (VESTALE) with RR Lyrae

The Astrophysical Journal Supplement Series
This work is part of VESTALE, a project initiated within the Legacy Survey of Space and Time (LSST) Cadence Strategy Optimization Process. Its goal is to explore the potential of Rubin-LSST observations aimed at the Galactic bulge (henceforth just “Bulge”
M. Di Criscienzo, S. Leccia, V. Braga, I. Musella, G. Bono, M. Dall’Ora, G. Fiorentino, M. Marconi, R. Molinaro, V. Ripepi, L. Girardi, A. Mazzi, G. Pastorelli, M. Trabucchi, N. Matsunaga, M. Monelli, A. Saha, K. A. Vivas, R. Zanmar Sanchez   +18 more
doaj   +1 more source

Radial velocities of planetary nebulae towards the Galactic bulge

, 1997
Accurate radial velocities for a sample of 71 planetary nebulae, mostly located in the direction of the Galactic Centre, are presented. Most of the nebulae discussed in this paper are likely members of the Galactic bulge, based on their radial velocity ...
A. A. Zijlstra, J. R. Walsh, A. Acker
core   +1 more source

Galactic Bulge microlensing optical depth from EROS-2 [PDF]

, 2006
Aims.We present a new EROS-2 measurement of the microlensing optical depth toward the Galactic Bulge. Methods: .Light curves of 5.6× 106 clump-giant stars distributed over 66 deg2 of the Bulge were monitored during seven Bulge seasons.
J. Haissinski, R. Ansari, Charlot, X., O. Perdereau, Vigroux, L., Albert, J. N., Le Guillou, L., J. Rich, Albert, J.N., Hamadache..[et al.], C., A. Gould, M. Spiro, Gould, A., Ferlet, R., C. Loup, Afonso, C., Coutures, C., Aubourg, É, Tisserand, Patrick, B. Goldman, Marquette, J.B., P. Bareyre, Tisserand, P., Glicenstein, J. F., Y. R. Rahal, X. Charlot, D. Graff, A. Milsztajn, R. Ferlet, Milsztajn, A., Magneville, C., Perdereau, O., Beaulieu, J.-P., L. Le Guillou, Loup, C., Maury, A., C. Hamadache, Fouqué, P., Goldman, B., Bareyre, P., Rahal, Y. R., É. Lesquoy, Glicenstein, J.F., Ansari, R., Maurice, É, Maurice, E., P. Tisserand, C. Magneville, Lesquoy, É, Zylberajch, S., J. F. Glicenstein, A. Vidal-Madjar, S. Zylberajch, M. Gros, Marquette, J. B., J. de Kat, Palanque-Delabrouille, N., C. Afonso, J. N. Albert, J. B. Marquette, Rich, J., Haissinski, J., Aubourg, E., É. Aubourg, Vidal-Madjar, A., Beaulieu, J. P., Lesquoy, E., A. Maury, Spiro, M., Gros, M., Graff, D., J. P. Beaulieu, J. Andersen, Andersen, J., Moniez, M., de Kat, J., L. Vigroux, Beaulieu, J.P., C. Coutures, M. Moniez, N. Palanque-Delabrouille, É. Maurice, Hamadache, C., P. Fouqué, Rahal, Y.R.   +84 more
core   +1 more source

Galactic bulges [PDF]

Monthly Notices of the Royal Astronomical Society, 2000
Mercedes Mollá, Federico Ferrini, Giacomo Gozzi   +2 more
openaire   +3 more sources