Results 51 to 60 of about 126,365 (213)

The Formation of the Galactic Bulge [PDF]

Symposium - International Astronomical Union, 1996
The question is adressed whether the problem of the stellar metallicity distribution and the dynamics of the stellar components in the bulge as found out by refined observations during recent years can be understood within the context of the evolution of the whole Galaxy.
M. Samland, G. Hensler
openaire   +1 more source

The Structure, Populations, and Kinematics of the Milky Way Central and Inner Bulge with OGLE, APOGEE, and Gaia Data

The Astrophysical Journal
We present an analysis of the structure, kinematics, and chemo-dynamical properties of the Milky Way bulge using RR Lyrae stars from Optical Gravitational Lensing Experiment (OGLE), and giant stars from APOGEE and Gaia that have distances placing them in
Xiao Han, Hai-Feng Wang, Giovanni Carraro, Martín López-Corredoira, Yuan-Sen Ting, Yang-Ping Luo, Guan-Yu Wang, (MWLUDPSG Collaboration)   +7 more
doaj   +1 more source

The Complex Structure of the Bulge of M31

The Astrophysical Journal Supplement Series, 2023
The bulge of M31 is of interest regarding the nature of galactic bulges and how their structure relates to bulge formation mechanisms and their subsequent evolution.
Denis Leahy, Traian Craiciu, Joseph Postma   +2 more
doaj   +1 more source

An Oceanic Mechanism for Geyser Formation on Enceladus

AGU Advances, Volume 7, Issue 5, August 2026.
Abstract The tiger stripes of Enceladus are a sequence of four parallel and evenly‐spaced fissures 130 km long that erupt water from a global subsurface ocean into space. We present an ocean dynamical theory of their formation. Given one initial fissure, topography on the underside of the ice shell rubs periodically against the ocean due to the ...
D. Y. Abdulah, W. Kang, A. Berne
wiley   +1 more source

On the deprojection of the Galactic bulge [PDF]

Monthly Notices of the Royal Astronomical Society, 1996
An algorithm is developed and tested for the problem posed by photometric observations of the bulge of the Milky Way. The latter subtends a non-trivial solid angle on the sky, and we show that this permits inversion of the projected brightness distribution under the assumption that the bulge has three orthogonal mirror planes of specified orientation ...
Binney, J, Gerhard, O
openaire   +3 more sources

A Near-infrared Extinction and Reddening Map toward the Galactic Bulge Using UKIRT

The Astronomical Journal
The Galactic bulge is one of the most information-dense regions to study resolved stellar populations, variables, and transients, such as microlensing events.
Aiden S. Zelakiewicz, Samson A. Johnson, B. Scott Gaudi, Geoffrey Bryden, David M. Nataf, Yossi Shvartzvald   +5 more
doaj   +1 more source

Atmospheric Constituent Data Assimilation in NASA's Goddard Earth Observing System

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Many of today's most significant and urgent scientific questions, including those about the impact of human activity on air quality and radiative forcing, require the synthesis of observations of atmospheric constituents and scientific theory.
B. Weir, K. Wargan, C. A. Keller, K. E. Knowland, P. A. Wales, V. Shah, B. M. Karpowicz, N. Balashov, L. E. Ott, R. Todling, S. E. Cohn, S. Pawson   +11 more
wiley   +1 more source

The history of the Galactic bulge [PDF]

Proceedings of the International Astronomical Union, 2016
AbstractPlanetary nebulae form in stellar populations with ages from 1 to 10 Gyr, and can be used to trace their star formation histories. Here we apply this to the Galactic bulge, where there are indications both for an old origin and for younger stars. We use new stellar models, which have significant different evolutionary speeds during the post-AGB
Zijlstra, A. A., Gesicki, K., Miller Bertolami, Marcelo Miguel   +2 more
openaire   +2 more sources

A Contrasting TEC Behavior Over the Low‐Latitude Post‐Midnight Sector During Recovery Phases of May and October 2024 Storms: Possible Role of PPEF, DDEF, and O/N2

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract The present study reports on the variability of the post‐midnight ionosphere over the low‐latitude sector during the recovery phases of the May and October 2024 storms. Multi‐instrument observations, comprising global navigation satellite system total electron content (TEC), F‐layer peak height, electron density profiles, and column O/N2 ...
Rahul Rathi, Akash Kumar, Alok Kumar Ranjan, Dipjyoti Patgiri, Satarupa Chakrabarti, Lot Ram   +5 more
wiley   +1 more source

3-Dimensional dynamics of the galactic bulge [PDF]

, 2010
This thesis is part of a project which attempts to unveil the structure of the galactic bulge of our galaxy through the study of the kinematics of stars in low foreground extinction windows.Thus, in order to effectively constraint the phase-space ...
Soto Vicencio, M.H.
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