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Cited by 18Astrophysics and Star Formation StudiesAstrophysical Phenomena and ObservationsAstrophysics and Cosmic Phenomena

Galactic Center Shells and a Recurrent Starburst Model

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Sofue, Yoshiaki·2003·Publications of the Astronomical Society of Japan
DOI 10.1093/pasj/55.2.445
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Abstract

By applying filtering techniques to remove straight filaments in the 20-cm VLA radio image of the Galactic Center Arc region, we have shown that numerous concentric radio shells of radii 5 to 20 pc are surrounding the Pistol and Sickle region, which we call Galactic Center Shells (GCS). Each shell has thermal energy of the order of $10^{49 \mbox{--} 50} \,\mathrm{erg}$. Several CO-line shells are associated, whose kinetic energies are of the order of $10^{49 \mbox{--} 50} \,\mathrm{erg}$. Summing up the energies of recognized GCSs, the total energy amounts to $\sim 10^{51} \,\mathrm{erg}$. The GCSs show an excellent correlation with the FIR shells observed at 16–26${\mu \mathrm {m}}$ with the MSX. We propose a model in which GCSs were produced by recurrent and/or intermittent starbursts in the Pistol area during the last million years. The most recent burst occurred some $10^5$ years ago, producing an inner round-shaped shell (GCS I); earlier ones a million years ago produced outer shells (GCS II and III), which are more deformed by interactions with the surrounding ISM and Sgr A halo. We argue that recurrent starbursts had also occurred in the past, which produced larger scale hyper-shell structures as well. A burst some million years ago produced the Galactic Center Lobe, and a much stronger one 15 million years ago produced the North Polar Spur.

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  • The presence of a ~30 pc radio bubble and X-ray emission around the Quintuplet super-cluster system provides an example of how the 450-pc radio bubbles could be powered by star-forming regions in the disk.

    “The presence of a ∼ 30 pc radio bubble and x-ray emission around the Quintuplet super-cluster system, east of the Sgr A ∗ , provides an example of how the 450-pc radio bubbles could be powered by star-forming regions in the disk (Yusef-Zadeh & Morris 1987; Sofue 2003; Ponti et al. 2015).”

    From The Fermi/eROSITA bubbles: a look into the nuclear outflow from the Milky Way (2024) · cites this paper as Sofue 2003

    The Abstract (p. 1) reports radio shells with radii of 5–20 pc near the Pistol and Sickle, and §4.1 (p. 5) links them to star formation near the Quintuplet. Section 3.5 (p. 5) reports X-ray emission near one shell, while §4.3 (p. 6) proposes that stronger or recurrent bursts produce larger structures. The paper does not identify 450-pc radio bubbles or specifically propose that star-forming regions in the disk power them. (LLM, conf=0.84)

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Research works printed but not linked: 1

  1. Maeda, Y. 1998, PhD Thesis, Kyoto University (ISAS Research Note No. 653)

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Authors
Sofue, Y.
Affiliations
The University of Tokyo (JP)
Corresponding author
Sofue, Yoshiaki
ORCID
Sofue, Yoshiaki
Venue
Publications of the Astronomical Society of Japan
Publisher
Oxford University Press (OUP)
Published
2003-04-25
Volume
55
Issue
2
Pages
445-450
ISSN
  • 0004-6264 (ISSN-L)
  • 2053-051X
DOI
10.1093/pasj/55.2.445
OpenAlex
W2082925669
Cited by
18
References
22
Citations by year
2024: 1 · 2021: 2 · 2020: 1 · 2018: 3 · 2016: 2 · 2015: 3 · 2013: 1
FWCI
0.19
Type
journal article
Language
en
Open access
Locations
  • Publications of the Astronomical Society of Japan (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysics and Star Formation Studies
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Astrophysics and Cosmic Phenomena
Keywords
radio shell, North Polar Spur, interstellar medium interaction, shell energy

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