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Relevant bibliographies by topics / North Polar Spur (NPS)

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Journal articles

Academic literature on the topic 'North Polar Spur (NPS)'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "North Polar Spur (NPS)"

1

Das, Kaustav K., Catherine Zucker, Joshua S. Speagle, Alyssa Goodman, Gregory M. Green, and João Alves. "Constraining the distance to the North Polar Spur with Gaia DR2." Monthly Notices of the Royal Astronomical Society 498, no. 4 (2020): 5863–72. http://dx.doi.org/10.1093/mnras/staa2702.

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ABSTRACT The North Polar Spur (NPS) is one of the largest structures observed in the Milky Way in both the radio and soft X-rays. While several predictions have been made regarding the origin of the NPS, modelling the structure is difficult without precise distance constraints. In this paper, we determine accurate distances to the southern terminus of the NPS and towards latitudes ranging up to 55°. First, we fit for the distance and extinction to stars towards the NPS using optical and near-infrared photometry and Gaia Data Release 2 astrometry. We model these per-star distance–extinction est

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Sofue, Yoshiaki, and Jun Kataoka. "Interaction of the galactic-centre super bubbles with the gaseous disc." Monthly Notices of the Royal Astronomical Society 506, no. 2 (2021): 2170–80. http://dx.doi.org/10.1093/mnras/stab1857.

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ABSTRACT The interaction of Galactic centre (GC) super bubbles (GSBs) with the gaseous disc and halo of the Milky Way is investigated using radio continuum, X-ray, H i, and CO line surveys. The radio North Polar Spur (NPS) constitutes the brightest eastern ridge of GSB, brightening towards the galactic plane and reaching l = 22○, b = +2○ at the sharpest end, where it intersects the tangential direction of the 3-kpc-expanding ring and crater. Examination of the spur ridges reveals that the entire GSB, including the NPS and its counter spurs, constitutes a GC-symmetrical Ω/ Ʊ shape. The thicknes

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3

Yamamoto, Marino, Jun Kataoka, and Yoshiaki Sofue. "Discovery of non-equilibrium ionization plasma associated with the North Polar Spur and Loop I." Monthly Notices of the Royal Astronomical Society 512, no. 2 (2022): 2034–43. http://dx.doi.org/10.1093/mnras/stac577.

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ABSTRACT We investigated the detailed plasma condition of the North Polar Spur (NPS)/Loop I using archival Suzaku data. In previous research, collisional ionization equilibrium (CIE) have been assumed for X-ray plasma state, but we also assume non-equilibrium ionization (NEI) to check the plasma condition in more detail. We found that most of the plasma in the NPS/Loop I favors the state of NEI, and has the density-weighted ionization timescale of net ∼ 1011–12 s cm−3 and the electron number density ne ∼ a few × 10−3 cm−3. The plasma shock age, t, or the time elapsed after the shock front pass

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4

West, J. L., T. L. Landecker, B. M. Gaensler, T. Jaffe, and A. S. Hill. "A Unified Model for the Fan Region and the North Polar Spur: A Bundle of Filaments in the Local Galaxy." Astrophysical Journal 923, no. 1 (2021): 58. http://dx.doi.org/10.3847/1538-4357/ac2ba2.

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Abstract 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 they are long, magnetized, and parallel filamentary structures that surround the Local arm and/or Local Bubble, in which the Sun is embedded. We show that this model is consistent with the large number of observational studies on these regions and is able to resolve an apparent contradiction in the literature that suggests that the high-latitude porti

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5

Kataoka, Jun, Yoshiaki Sofue, Yoshiyuki Inoue, Masahiro Akita, Shinya Nakashima, and Tomonori Totani. "X-Ray and Gamma-Ray Observations of the Fermi Bubbles and NPS/Loop I Structures." Galaxies 6, no. 1 (2018): 27. http://dx.doi.org/10.3390/galaxies6010027.

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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 emission associated with Loop I, a radio continuum loop spanning across 100° on the sky, is still being debated. The northern-most part of Loop I, known as the North Polar Spur (NPS), is the brightest arm and is even clearly visible in the ROSAT X-ray sky map. In this paper, we present a comprehensive review on the X-ray observations of the Fermi bubbles and the

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6

Sofue, Yoshiaki. "The North Polar Spur and Aquila Rift." Monthly Notices of the Royal Astronomical Society 447, no. 4 (2015): 3824–31. http://dx.doi.org/10.1093/mnras/stu2661.

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7

Miroshnichenko, A. P. "THE NORTH POLAR SPUR AS OUR GALAXY JET." Radio Physics and Radio Astronomy 1, no. 2 (2010): 93–98. http://dx.doi.org/10.1615/radiophysicsradioastronomy.v1.i2.10.

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8

LaRocca, Daniel M., Philip Kaaret, K. D. Kuntz, et al. "An Analysis of the North Polar Spur Using HaloSat." Astrophysical Journal 904, no. 1 (2020): 54. http://dx.doi.org/10.3847/1538-4357/abbdfd.

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9

Willingale, R., A. D. P. Hands, R. S. Warwick, S. L. Snowden, and D. N. Burrows. "The X-ray spectrum of the North Polar Spur." Monthly Notices of the Royal Astronomical Society 343, no. 3 (2003): 995–1001. http://dx.doi.org/10.1046/j.1365-8711.2003.06741.x.

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10

Miller, Eric D., Hiroshi Tsunemi, Mark W. Bautz, et al. "Suzaku Observations of the North Polar Spur: Evidence for Nitrogen Enhancement." Publications of the Astronomical Society of Japan 60, sp1 (2008): S95—S106. http://dx.doi.org/10.1093/pasj/60.sp1.s95.

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