Results 61 to 70 of about 4,353 (224)

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

Orientation of Galactic Bulge Planetary Nebulae toward the Galactic Center [PDF]

, 2016
We have used the Wide Field Spectrograph on the Australian National University 2.3-m telescope to perform the integral field spectroscopy for a sample of the Galactic planetary nebulae.
Parker, QA, Danehkar, A
core   +1 more source

Modeling Asteroseismic Yields for the Roman Galactic Bulge Time-domain Survey

The Astrophysical Journal
The Galactic Bulge Time-Domain Survey (GBTDS) of the Roman Space Telescope will take high-cadence data of the Galactic bulge. We investigate the asteroseismic potential of this survey for red giants.
Trevor J. Weiss, Noah J. Downing, Marc H. Pinsonneault, Joel C. Zinn, Dennis Stello, Timothy R. Bedding, Kaili Cao, Marc Hon, Claudia Reyes, B. Scott Gaudi, Robert F. Wilson, Daniel Huber, Sanjib Sharma   +12 more
doaj   +1 more source

Elemental abundances in AGB stars and the formation of the Galactic bulge

EPJ Web of Conferences, 2012
We obtained high-resolution near-IR spectra of 45 AGB stars located in the Galactic bulge. The aim of the project is to determine key elemental abundances in these stars to help constrain the formation history of the bulge.
Wood P.R., Ryde N., Lebzelter T., Blommaert J.A.D.L., Uttenthaler S., Schultheis M., Aringer B.   +6 more
doaj   +1 more source

Deletion of a Pax1 Sex‐Associated Genomic Region Associated With Adolescent Idiopathic Scoliosis Leads to Disc Degeneration, Instability, and Vertebral Rotation in Mice

JOR SPINE, Volume 9, Issue 2, June 2026.
Overview of the effects of Pax1‐SAR deletion on gene expression, IVD degeneration, and resultant scoliotic‐like curvature between sexes. Proposed mechanism of sex‐dependent changes in gene expression in females (right) and males (left), resulting in sex‐dependent disc degeneration and scoliotic phenotypes.
Edward C. Moody, Emma M. Wade, Shuji Mizumoto, Jeremy McCallum‐Loudeac, Megan J. Wilson   +4 more
wiley   +1 more source

The spheroidal bulge of the Milky Way: Chemodynamically distinct from the inner-thick disc and bar

Astronomy & Astrophysics
Studying the composition and origin of the inner region of our Galaxy—the “Galactic bulge”—is crucial for understanding the formation and evolution of the Milky Way and other galaxies.
Nepal S., Chiappini C., Pérez-Villegas A., Queiroz A. B., Souza S., Steinmetz M., Anders F., Khalatyan A., Barbuy B., Guiglion G.   +9 more
doaj   +1 more source

Blazhko modulation in first-overtone RR Lyrae stars from the OGLE Collection

EPJ Web of Conferences, 2017
We present results of the first comprehensive study of the Blazhko effect in first-overtone RR Lyrae stars from the Galactic bulge based on the Optical Gravitational Lensing Experiment data.
Netzel Henryka, Smolec Radoslaw, Soszński Igor   +2 more
doaj   +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

Contemporaneous Appearances of Auroral Spiral and Transpolar Arc: Polar UVI Observations and Global MHD Simulations

Earth and Space Science, Volume 13, Issue 6, June 2026.
Abstract A local vortex‐structured aurora and a large‐scale transpolar arc (TPA) were contemporaneously observed by the Polar ultraviolet imager (UVI) during the late recovery phase of a substorm, and the interplanetary magnetic field (IMF) BY and BZ were negative and negative‐to‐positive. The TPA grew along the dawnside auroral oval from the nightside
Motoharu Nowada, Yukinaga Miyashita, Aoi Nakamizo, Noora Partamies, Quan‐Qi Shi   +4 more
wiley   +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