Results 71 to 80 of about 153,252 (195)

The Population of the Galactic Center Filaments: Position Angle Distribution Reveals a Degree-scale Collimated Outflow from Sgr A* along the Galactic Plane

The Astrophysical Journal Letters, 2023
We have examined the distribution of the position angle (PA) of the Galactic center filaments with lengths L > 66″ and
F. Yusef-Zadeh, R. G. Arendt, M. Wardle, I. Heywood   +3 more
doaj   +1 more source

The Distance to the Galactic Center [PDF]

Publications of the Astronomical Society of the Pacific, 2000
AbstractThe Optical Gravitational Lensing Experiment (OGLE) data on high-amplitude δ Scuti Stars (HADS) and RR Lyrae stars have been analyzed to determine the distance to the galactic bulge. We find a mean value of 14.47 ± 0.08 mag for the bulge distance modulus.
D. H. McNamara, J. B. Madsen, J. Barnes, B. F. Ericksen   +3 more
openaire   +1 more source

Distribution Function-based Modeling of Discrete Kinematic Datasets, in Application to the Milky Way Nuclear Star Cluster

The Astrophysical Journal
We present a method for constructing dynamical models of stellar systems described by distribution functions and constrained by discrete-kinematic data.
Eugene Vasiliev, Anja Feldmeier-Krause, Mattia C. Sormani   +2 more
doaj   +1 more source

Supermassive boson star at the galactic center?

Physical Review D, 2000
We explore whether supermassive non-baryonic stars (in particular boson, mini-boson and non-topological soliton stars) might be at the center of some galaxies, with special attention to the Milky Way. We analyze, from a dynamical point of view, what current observational data show, concluding that they are compatible with a single supermassive object ...
Diego F. Torres, Gaetano Lambiase, Gaetano Lambiase, Salvatore Capozziello, Salvatore Capozziello   +4 more
openaire   +4 more sources

Widespread Hot Molecular Gas Heated by Shear-induced Turbulence in the Galactic Center

The Astrophysical Journal
We observed NH _3 metastable inversion lines from (3, 3) to (18, 18) toward G0.66-0.13 in the Galactic center with the Shanghai Tianma 65 m radio telescope and Yebes 40 m telescope.
Juan Li, Junzhi Wang, Zhiqiang Shen, Alba Vidal-García, Yuqiang Li, Di Li, Liubin Pan, Lei Huang, Fengyao Zhu, Siqi Zheng, Yiping Ao, Alvaro Sanchez-Monge, Zhiyu Zhang, Xing Lu, Tie Liu, Xingwu Zheng   +15 more
doaj   +1 more source

Estimating the parameters of the Sgr A* black hole

, 2010
The measurement of relativistic effects around the galactic center may allow in the near future to strongly constrain the parameters of the supermassive black hole likely present at the galactic center (Sgr A*).
A. A. Nucita, A. F. Zakharov, A. Qadir, A.A. Nucita, A.F. Zakharov, A.F. Zakharov, A.F. Zakharov, A.F. Zakharov, A.M. Ghez, A.M. Ghez, B. Carter, D. Bini, D. Christodoulou, D.E. Holz, E.E. Eiroa, F. De Paolis, F. De Paolis, F. De Paolis, G. Belanger, G. Ingrosso, H.C. Ohanian, J. Hall, J. Narayan, K. Beckwith, K.S. Virbhadra, K.S. Virbhadra, M.J. Reid, R. Penrose, R. Schödel, R.H. Boyer, S. Chandrasekhar, S. Gillessen, S.E. Vázquez, S.S. Doeleman, T. Alexander, V. Bozza, V. Bozza, V. Bozza, V. Bozza, V. Bozza   +39 more
core   +1 more source

3D CMZ. III. Constraining the 3D Structure of the Central Molecular Zone via Molecular Line Emission and Absorption

The Astrophysical Journal
The Milky Way’s Central Molecular Zone (CMZ) is the largest concentration of dense molecular gas in the Galaxy, the structure of which is shaped by the complex interplay between Galactic-scale dynamics and extreme physical conditions.
Daniel L. Walker, Cara Battersby, Dani Lipman, Mattia C. Sormani, Adam Ginsburg, Simon C. O. Glover, Jonathan D. Henshaw, Steven N. Longmore, Ralf S. Klessen, Katharina Immer, Danya Alboslani, John Bally, Ashley Barnes, H Perry Hatchfield, Elisabeth A. C. Mills, Rowan Smith, Robin G. Tress, Qizhou Zhang   +17 more
doaj   +1 more source

A Proposal for Enhancing Technosignature Search toward the Galactic Center

The Astrophysical Journal
We discuss the possibility of enhancing intelligent life searches toward the Galactic center. From the clockwork orbital motions of stars around the Sgr A* black hole, we can determine the distance to the Galactic center at an exceptional accuracy ...
Naoki Seto
doaj   +1 more source

Trigonometric Parallaxes of Star Forming Regions in the Scutum Spiral Arm

, 2014
We report measurements of trigonometric parallaxes for six high-mass star-forming regions in the Scutum spiral arm of the Milky Way as part of the BeSSeL Survey.
Brunthaler, A., Dame, T. M., Immer, K., Menten, K. M., Reid, M. J., Sanna, A., Sato, M., Wu, Y. W., Zhang, B.   +8 more
core   +1 more source

The Impact of Supermassive Black Holes on Exoplanet Habitability. I. Spanning the Natural Mass Range

The Astrophysical Journal
While the influence of supermassive black hole (SMBH) activity on habitability has garnered attention, the specific effects of active galactic nucleus (AGN) winds, particularly ultrafast outflows (UFOs), on planetary atmospheres remain largely unexplored.
Jourdan Waas, Eric S. Perlman, Manasvi Lingam, Emily Lohmann, Jackson Kernan, Francesco Tombesi, Amedeo Balbi, Alessandra Ambrifi   +7 more
doaj   +1 more source