Results 121 to 130 of about 35,709 (214)

Einstein@Home Searches for Gamma-Ray Pulsars in the Inner Galaxy

The Astrophysical Journal
The Fermi Large Area Telescope (LAT) has revealed a mysterious extended excess of GeV gamma-ray emission around the Galactic Center (GC), which can potentially be explained by unresolved emission from a population of pulsars, particularly millisecond ...
C. J. Clark, M. Di Mauro, J. Wu, B. Allen, O. Behnke, H. B. Eggenstein, B. Machenschalk, L. Nieder, P. M. Saz Parkinson, A. Ashok, P. Bruel, B. McGloughlin, M. A. Papa, F. Camilo, M. Kerr, P. Voraganti Padmanabh, S. M. Ransom   +16 more
doaj   +1 more source

A Breakdown of the Black Hole–Bulge Mass Relation in Local Active Galaxies

The Astrophysical Journal
We investigate the relation between black hole (BH) mass and bulge stellar mass for a sample of 117 local ( z ∼ 0) galaxies hosting low-luminosity, broad-line active galactic nuclei (AGNs).
Megan R. Sturm, Amy E. Reines
doaj   +1 more source

CAPOS: The bulge Cluster APOgee Survey

Astronomy & Astrophysics
Context. This study presents detailed elemental abundances in the intermediate-metallicity bulge globular cluster Djorg 2 based on high-resolution near-infrared spectra of six (R ~ 22 500) members obtained through the bulge Cluster APOgee Survey (CAPOS).
Pino-Zúñiga Thaiz, Villanova Sandro, Geisler Doug, Fernandez-Trincado José G., Muñoz Cesar, Barrera Nicolás, Sepúlveda-López Franco, Uribe Macarena   +7 more
doaj   +1 more source

Tracing Back a Second-generation Star Stripped from Terzan 5 by the Galactic Bar

The Astrophysical Journal Letters
The Galactic bulge hosts the Milky Way’s oldest stars, possibly coming from disrupted globular clusters (GCs) or the bulge’s primordial building blocks, making these stars witnesses to the Galaxy’s early chemical enrichment.
Stefano O. Souza, Marica Valentini, Cristina Chiappini, Angeles Pérez-Villegas, Josefina Montalbán, Diego Bossini, Beatriz Barbuy, Yvonne Elsworth, Rafael A. Garcia   +8 more
doaj   +1 more source

The LEGARE Project

Astronomy & Astrophysics
Context. The nuclear stellar disc (NSD) of the Milky Way is a dense, rotating stellar system in the central ~200 pc. The NSD is thought to be primarily fuelled by bar-driven gas inflows from the inner Galactic disc. Aims.
Spitoni E., Schultheis M., Matteucci F., Ryde N., Cescutti G., Saro A., Sormani M. C., Thorsbro B.   +7 more
doaj   +1 more source

Tracing the Galactic Origins of Selected Four G-type Stars in the Solar Neighborhood

The Astronomical Journal
We present a multimethod investigation of four metal-poor G-type main-sequence stars to resolve their Galactic origins. By combining high-resolution spectroscopy from PolarBase, photometric/astrometric data from Gaia DR3, and spectral energy distribution
Deniz Cennet Çınar, Selçuk Bilir, Timur Şahin, Olcay Plevne   +3 more
doaj   +1 more source

Asymmetric eROSITA bubbles as the evidence of a circumgalactic medium wind. [PDF]

Nat Commun, 2023
Mou G, Sun D, Fang T, Wang W, Zhang R, Yuan F, Sofue Y, Wang T, He Z.   +8 more
europepmc   +1 more source

Formation Models of the Galactic Bulge

, 2014
The Galactic bulge is now considered to be the inner three-dimensional part of the Milky Way's bar. It has a peanut shape and is characterized by cylindrical rotation. In N-body simulations, box/peanut bulges arise from disks through bar and buckling instabilities.
openaire   +3 more sources

Cosmic ray feedback in galaxies and galaxy clusters: A pedagogical introduction and a topical review of the acceleration, transport, observables, and dynamical impact of cosmic rays. [PDF]

Astron Astrophys Rev, 2023
Ruszkowski M, Pfrommer C.
europepmc   +1 more source

Dynamical Mechanism of Episodic Gas Accretion to the Central Region of Spiral Galaxies

The Astrophysical Journal
We performed N -body/smoothed particle hydrodynamics simulations of isolated spiral galaxies with various bulge-to-disk mass ratios ( M _bulge / M _disk ) from 0.02 to 0.2 to investigate mass transport from galactic scales (10 kpc) down to circumnuclear ...
Naomichi Yutani, Nozomu Kawakatu, Takayuki Saitoh, Keiichi Wada   +3 more
doaj   +1 more source