The excitation mechanism of forbidden Fe II 1.644 micron emission in Seyfert and starburst galaxies revisited

1993 ◽  
Vol 406 ◽  
pp. 52 ◽  
Author(s):  
Hideaki Mouri ◽  
Kimiaki Kawara ◽  
Yoshiaki Taniguchi
Keyword(s):  
Starburst Galaxies ◽  
Excitation Mechanism

Excitation Mechanism of Near‐Infrared [Feii] Emission in Seyfert and Starburst Galaxies

2000 ◽  
Vol 528 (1) ◽  
pp. 186-200 ◽  
Author(s):  
Hideaki Mouri ◽  
Kimiaki Kawara ◽  
Yoshiaki Taniguchi
Keyword(s):  
Near Infrared ◽  
Starburst Galaxies ◽  
Excitation Mechanism

scholarly journals Excitation Mechanism of Near‐Infrared [Feii] Emission in Seyfert and Starburst Galaxies

2000 ◽  
Vol 537 (2) ◽  
pp. 1100-1100
Author(s):  
H. Mouri ◽  
K. Kawara ◽  
Y. Taniguchi
Keyword(s):  
Near Infrared ◽  
Starburst Galaxies ◽  
Excitation Mechanism

Excitation mechanism of forbidden Fe II 1.644 micron emission in Seyfert and starburst galaxies

1990 ◽  
Vol 360 ◽  
pp. 55 ◽  
Author(s):  
Hideaki Mouri ◽  
Minoru Nishida ◽  
Yoshiaki Taniguchi ◽  
Kimiaki Kawara
Keyword(s):  
Starburst Galaxies ◽  
Excitation Mechanism

The Structure and Morphology of the Ionized Gas in Starburst Galaxies: NGC 5253/5236

1999 ◽  
Vol 118 (2) ◽  
pp. 797-816 ◽  
Author(s):  
Daniela Calzetti ◽  
Christopher J. Conselice ◽  
John S. Gallagher III ◽  
Anne L. Kinney
Keyword(s):  
Starburst Galaxies ◽  
Ionized Gas ◽  
Structure And Morphology

scholarly journals Starburst galaxies strike back: a multi-messenger analysis with Fermi-LAT and IceCube data

2021 ◽  
Vol 503 (3) ◽  
pp. 4032-4049
Author(s):  
Antonio Ambrosone ◽  
Marco Chianese ◽  
Damiano F G Fiorillo ◽  
Antonio Marinelli ◽  
Gennaro Miele ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Gamma Ray ◽  
Neutrino Flux ◽  
Data Interpretation ◽  
Realistic Model ◽  
High Energy ◽  
Starburst Galaxies ◽  
Neutrino Factory ◽  
High Energy Cosmic Rays ◽  
Astrophysical Objects

ABSTRACT Starburst galaxies, which are known as ‘reservoirs’ of high-energy cosmic-rays, can represent an important high-energy neutrino ‘factory’ contributing to the diffuse neutrino flux observed by IceCube. In this paper, we revisit the constraints affecting the neutrino and gamma-ray hadronuclear emissions from this class of astrophysical objects. In particular, we go beyond the standard prototype-based approach leading to a simple power-law neutrino flux, and investigate a more realistic model based on a data-driven blending of spectral indexes, thereby capturing the observed changes in the properties of individual emitters. We then perform a multi-messenger analysis considering the extragalactic gamma-ray background (EGB) measured by Fermi-LAT and different IceCube data samples: the 7.5-yr high-energy starting events (HESE) and the 6-yr high-energy cascade data. Along with starburst galaxies, we take into account the contributions from blazars and radio galaxies as well as the secondary gamma-rays from electromagnetic cascades. Remarkably, we find that, differently from the highly-constrained prototype scenario, the spectral index blending allows starburst galaxies to account for up to $40{{\ \rm per\ cent}}$ of the HESE events at $95.4{{\ \rm per\ cent}}$ CL, while satisfying the limit on the non-blazar EGB component. Moreover, values of $\mathcal {O}(100\, \mathrm{PeV})$ for the maximal energy of accelerated cosmic-rays by supernovae remnants inside the starburst are disfavoured in our scenario. In broad terms, our analysis points out that a better modelling of astrophysical sources could alleviate the tension between neutrino and gamma-ray data interpretation.

scholarly journals Understanding the origin of radio outflows in Seyfert galaxies using radio polarimetry

2019 ◽  
Vol 15 (S356) ◽  
pp. 247-251
Author(s):  
Biny Sebastian ◽  
Preeti Kharb ◽  
Christopher P. O’ Dea ◽  
Jack F. Gallimore ◽  
Stefi A. Baum ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Radio Emission ◽  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Seyfert Galaxy ◽  
Seyfert Galaxies ◽  
Starburst Galaxies ◽  
Galactic Magnetic Fields ◽  
5 Ghz

AbstractThe role of starburst winds versus active galactic nuclei (AGN) jets/winds in the formation of the kiloparsec scale radio emission seen in Seyferts is not yet well understood. In order to be able to disentangle the role of various components, we have observed a sample of Seyfert galaxies exhibiting kpc-scale radio emission suggesting outflows, along with a comparison sample of starburst galaxies, with the EVLA B-array in polarimetric mode at 1.4 GHz and 5 GHz. The Seyfert galaxy NGC 2639, shows highly polarized secondary radio lobes, not observed before, which are aligned perpendicular to the known pair of radio lobes. The additional pair of lobes represent an older epoch of emission. A multi-epoch multi-frequency study of the starburst-Seyfert composite galaxy NGC 3079, reveals that the jet together with the starburst superwind and the galactic magnetic fields might be responsible for the well-known 8-shaped radio lobes observed in this galaxy. We find that many of the Seyfert galaxies in our sample show bubble-shaped lobes, which are absent in the starburst galaxies that do not host an AGN.

scholarly journals Why Post-starburst Galaxies Are Now Quiescent

2018 ◽  
Vol 861 (2) ◽  
pp. 123 ◽  
Author(s):  
K. Decker French ◽  
Ann I. Zabludoff ◽  
Ilsang Yoon ◽  
Yancy Shirley ◽  
Yujin Yang ◽  
...  
Keyword(s):  
Starburst Galaxies
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