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The elusive polarized microwave signal from the Fermi bubbles is disentangled from the more extended polarized lobes, which similarly emanate from the Galactic plane but stretch farther west of the bubbles. The projected ~20% synchrotron…

高能天体物理现象 · 物理学 2026-04-24 Uri Keshet

The $Fermi$ gamma-ray telescope discovered a pair of bubbles at the Galactic center. These structures are spatially-correlated with the microwave emission detected by the WMAP and Planck satellites. These bubbles were likely inflated by a…

高能天体物理现象 · 物理学 2015-06-18 M. Ruszkowski , H. -Y. K. Yang , E. Zweibel

We present a polarisation map of the warm dust emission from the minispiral in the central parsec of the Galactic centre. The observations were made at a wavelength of 12.5 microns with CanariCam mounted on the 10.4-m Gran Telescopio…

星系天体物理 · 物理学 2018-02-20 PF Roche , E Lopez-Rodriguez , CM Telesco , R Schodel , C Packham

The Fermi bubbles are part of a complex region of the Milky Way. This region presents broadband extended non-thermal radiation, apparently coming from a physical structure rooted in the Galactic Centre and with a partly-ordered magnetic…

高能天体物理现象 · 物理学 2015-06-18 Maxim V. Barkov , Valenti Bosch-Ramon

The magnetic structure in the Galactic disk, the Galactic center and the Galactic halo can be delineated more clearly than ever before. In the Galactic disk, the magnetic structure has been revealed by starlight polarization within 2 or 3…

星系天体物理 · 物理学 2009-11-13 J. L. Han

Data from the Fermi-LAT reveal two large gamma-ray bubbles, extending 50 degrees above and below the Galactic center, with a width of about 40 degrees in longitude. The gamma-ray emission associated with these bubbles has a significantly…

高能天体物理现象 · 物理学 2011-01-03 Meng Su , Tracy R. Slatyer , Douglas P. Finkbeiner

We have observed the linear polarization of 450 micron continuum emission from the Galactic center, using a new polarimetric detector system that is operated on a 2 m telescope at the South Pole. The resulting polarization map extends ~ 170…

Evidence has increasingly mounted in recent decades that outflows of matter and energy from the central parsecs of our Galaxy have shaped the observed structure of the Milky Way on a variety of larger scales. On scales of ~15 pc, the…

高能天体物理现象 · 物理学 2019-04-15 G. Ponti , F. Hofmann , E. Churazov , M. R. Morris , F. Haberl , K. Nandra , R. Terrier , M. Clavel , A. Goldwurm

The Fermi bubbles were possibly created by large injections of energy into the Galactic Center (GC), either by an active galactic nucleus (AGN) or by nuclear starburst more than ~10 Myr ago. However, the origin of the diffuse gamma-ray…

高能天体物理现象 · 物理学 2018-03-12 Jun Kataoka , Yoshiaki Sofue , Yoshiyuki Inoue , Masahiro Akita , Shinya Nakashima , Tomonori Totani

We report on the detection of radio bursts from the Galactic bulge using the real-time transient detection and localization system, realfast. The pulses were detected commensally on the Karl G. Jansky Very Large Array during a survey of…

We discuss a high resolution (FWHM~ 0.45 arcsec) image of the emissive polarization from warm dust in the minispiral in the Galactic Centre and discuss the implications for the magnetic field in the dusty filaments. The image was obtained…

星系天体物理 · 物理学 2018-08-01 P. F. Roche , E. Lopez-Rodriguez , C. M. Telesco , R. Schodel , C. Packham

The nucleus of the Milky Way is known to harbour regions of intense star formation activity as well as a super-massive black hole. Recent Fermi space telescope observations have revealed regions of \gamma-ray emission reaching far above and…

The Galactic Center's giant outflows are manifest in three different, non-thermal phenomena: i) the hard-spectrum, \gamma-ray `Fermi Bubbles' emanating from the nucleus and extending to |b| ~ 50 degrees; ii) the hard-spectrum,…

高能天体物理现象 · 物理学 2015-07-30 Roland M. Crocker , Geoffrey V. Bicknell , Andrew M. Taylor , Ettore Carretti

The origin of North Polar Spur (NPS) and Loop-I has been debated over almost half a century and is still unresolved. Most of the confusion is caused by the absence of any prominent counterparts of these structures in the southern Galactic…

星系天体物理 · 物理学 2018-12-05 Kartick Chandra Sarkar

We used data from the \wmap satellite at 23, 33 and 41 GHz to study the diffuse polarised emission over the entire sky. The emission originates mostly from filamentary structures with well-ordered magnetic fields. Some of these structures…

星系天体物理 · 物理学 2015-07-15 Matias Vidal , C. Dickinson , R. D. Davies , J. P. Leahy

We present a simple, unified model that can explain two of the brightest, large-scale, diffuse, polarized radio features in the sky, the North Polar Spur (NPS) and the Fan Region, along with several other prominent loops. We suggest that…

星系天体物理 · 物理学 2021-12-22 J. L. West , T. L. Landecker , B. M. Gaensler , T. Jaffe , A. S. Hill

Radio continuum, microwave and gamma-ray images of the Milky Way reveal a conspicuous, loop-like structure that fills almost half of the northern Galactic hemisphere, called Loop I. The interior of Loop I is shining in soft X-rays, and its…

星系天体物理 · 物理学 2023-04-27 Rosine Lallement

We present a polarimetric map of a 20'x20' area toward the Galactic center. The polarization of point sources has been measured in the J, H, and Ks bands using the near-infrared polarimetric camera SIRPOL on the 1.4 m telescope IRSF. One…

The Fermi Bubbles are giant Galactic structures observed in both gamma-rays and microwaves. Recent studies have found support for the hypothesis that the gamma-ray and microwave emission can both be understood as arising from a hard…

高能天体物理现象 · 物理学 2017-05-03 Sruthi A. Narayanan , Tracy R. Slatyer

Recently evidence has emerged for enormous features in the gamma-ray sky observed by the Fermi-LAT instrument: bilateral `bubbles' of emission centered on the core of the Galaxy and extending to around 10 kpc above and below the Galactic…

星系天体物理 · 物理学 2011-03-24 Roland M. Crocker , Felix Aharonian
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