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Title: Arp 70: an interacting galaxy with extreme outflows

Abstract

ABSTRACT We analysed a Fabry–Pérot (FP) cube of the interacting pair of galaxies Arp 70, which was obtained from the CeSAM public repository of FP data. On the larger galaxy Arp 70b, we detected the spectral signature of two different outflows, one located in the centre and the other associated with a giant H ii region in the arm region. The central outflow is especially prominent, with the flux of the secondary peaks in the emission-line profiles due to the outflowing gas being similar to that of the main peak. We used an archive fibre spectrum from SDSS to confirm this detection in H α as well as in the [N ii] line and, in addition, to perform diagnostics on the nature of the ionization. The emission at the centre is consistent with a low-ionization nuclear emission-line region and a weak active galactic nucleus. Using the spatial distribution of the profiles in the FP cube, we estimated the shape of the outflow which is consistent with two cones of expanding material, one approaching and the other receding from us, and used this to estimate the physical parameters of the outflow, finding energies of order 1057 erg and masses of order 108 M⊙. Onmore » the giant H ii region, we found a very large expanding superbubble with a diameter of ∼5 kpc. The bubble has an energy of order 1054 erg and a mass of about 4 × 107 M⊙. We discuss the possible origins for both of these features and whether they could be associated with the interaction between the galaxies.« less

Authors:
 [1];  [2];  [3]; ORCiD logo [3];  [4];  [5]
  1. Instituto de Astrofísica de Canarias, C/Vía Láctea s/n, E-38205 La Laguna, Tenerife, Spain, Department of Astrophysics, University of La Laguna, E-38205 La Laguna, Tenerife, Spain, Instituto de Astronomía, Universidad Nacional Autónoma de México, Apartado Postal 70-264, CP 04510 Ciudad de México, México
  2. Instituto de Astrofísica de Canarias, C/Vía Láctea s/n, E-38205 La Laguna, Tenerife, Spain, Department of Astrophysics, University of La Laguna, E-38205 La Laguna, Tenerife, Spain, CSIC, E-2806 Madrid, Spain
  3. Instituto de Astrofísica de Canarias, C/Vía Láctea s/n, E-38205 La Laguna, Tenerife, Spain, Department of Astrophysics, University of La Laguna, E-38205 La Laguna, Tenerife, Spain
  4. Instituto de Astronomía, Universidad Nacional Autónoma de México, Apartado Postal 70-264, CP 04510 Ciudad de México, México
  5. Instituto de Astrofísica de Canarias, C/Vía Láctea s/n, E-38205 La Laguna, Tenerife, Spain, NASA Ames Research Center, N245-6, Moffett Field, CA 94035, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1601680
Resource Type:
Published Article
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
[Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 493 Journal Issue: 1]; Journal ID: ISSN 0035-8711
Publisher:
Oxford University Press
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Camps-Fariña, A., Beckman, J. E., Font, J., del Moral-Castro, I., Sanchez, S. F., and Borlaff, A. Arp 70: an interacting galaxy with extreme outflows. United Kingdom: N. p., 2020. Web. doi:10.1093/mnras/staa347.
Camps-Fariña, A., Beckman, J. E., Font, J., del Moral-Castro, I., Sanchez, S. F., & Borlaff, A. Arp 70: an interacting galaxy with extreme outflows. United Kingdom. doi:10.1093/mnras/staa347.
Camps-Fariña, A., Beckman, J. E., Font, J., del Moral-Castro, I., Sanchez, S. F., and Borlaff, A. Fri . "Arp 70: an interacting galaxy with extreme outflows". United Kingdom. doi:10.1093/mnras/staa347.
@article{osti_1601680,
title = {Arp 70: an interacting galaxy with extreme outflows},
author = {Camps-Fariña, A. and Beckman, J. E. and Font, J. and del Moral-Castro, I. and Sanchez, S. F. and Borlaff, A.},
abstractNote = {ABSTRACT We analysed a Fabry–Pérot (FP) cube of the interacting pair of galaxies Arp 70, which was obtained from the CeSAM public repository of FP data. On the larger galaxy Arp 70b, we detected the spectral signature of two different outflows, one located in the centre and the other associated with a giant H ii region in the arm region. The central outflow is especially prominent, with the flux of the secondary peaks in the emission-line profiles due to the outflowing gas being similar to that of the main peak. We used an archive fibre spectrum from SDSS to confirm this detection in H α as well as in the [N ii] line and, in addition, to perform diagnostics on the nature of the ionization. The emission at the centre is consistent with a low-ionization nuclear emission-line region and a weak active galactic nucleus. Using the spatial distribution of the profiles in the FP cube, we estimated the shape of the outflow which is consistent with two cones of expanding material, one approaching and the other receding from us, and used this to estimate the physical parameters of the outflow, finding energies of order 1057 erg and masses of order 108 M⊙. On the giant H ii region, we found a very large expanding superbubble with a diameter of ∼5 kpc. The bubble has an energy of order 1054 erg and a mass of about 4 × 107 M⊙. We discuss the possible origins for both of these features and whether they could be associated with the interaction between the galaxies.},
doi = {10.1093/mnras/staa347},
journal = {Monthly Notices of the Royal Astronomical Society},
number = [1],
volume = [493],
place = {United Kingdom},
year = {2020},
month = {2}
}

Journal Article:
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DOI: 10.1093/mnras/staa347

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