Hostname: page-component-5db58dd55d-ggg9q Total loading time: 0 Render date: 2026-06-14T03:18:43.100Z Has data issue: false hasContentIssue false
  • English
  • Français

OH megamaser emission in the outflow of the luminous infrared galaxy Zw049.057

Published online by Cambridge University Press:  07 February 2024

Susanne Aalto Open the ORCID record for Susanne Aalto [Opens in a new window] ,
Boy Lankhaar ,
Clare Wethers ,
Javier Moldon Open the ORCID record for Javier Moldon [Opens in a new window]  and
Robert Beswick
Susanne Aalto*
Affiliation:
Department of Space Earth and Environment, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.
Boy Lankhaar
Affiliation:
Department of Space Earth and Environment, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden. Leiden Observatory, Leiden University, 2300 RA, Leiden, The Netherlands
Clare Wethers
Affiliation:
Department of Space Earth and Environment, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.
Javier Moldon
Affiliation:
Instituto de Astrofsica de Andaluca (IAA, CSIC), Glorieta de la Astronoma, s/n, E-18008 Granada, Spain
Robert Beswick
Affiliation:
Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Alan Turing Building, Oxford Road, Manchester, M13 9PL, UK
*
email: saalto@chalmers.se
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the 'Save PDF' action button.

High resolution (0."26 × 0."13 (70 × 35 pc)) L-band (18 cm) OH megamaser (OHM) e-Merlin observations of the LIRG Zw049.057 show that the emission is emerging from a low velocity outflowing structure - which is foreground to a fast, dense and collimated molecular outflow detected by ALMA. The extremely dusty compact obscured nucleus (CON) of Zw049.057 has no (or only little) OHM emission associated with it - possibly because of too high number densities that quench the OHM. In contrast we detect 6 cm H2CO emission primarily from the CON-region. We suggest that the OHM-region of Zw049.057 is not directly associated with star formation, but instead occurs in a wide-angle, slow outflow that surrounds the fast and dense outflow. The OHM is pumped by IR emission that likely stems from activities in the nucleus. We briefly discuss how OHM emission can be used as a probe of LIRG-CON galaxies.

Keywords

galaxies: evolutiongalaxies: individual: Zw049.057galaxies: activegalaxies: nucleiISM: moleculesISM: jets and outflows

Information

Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S380: Cosmic Masers: Proper Motion toward the Next-Generation Large Projects , December 2022 , pp. 40 - 44
Check for updates
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

Aalto, S., Martn, S., Costagliola, F., et al. 2015, A&A, 584, 42 Google Scholar
Aalto, S., Muller, S., König, F., et al. 2019, A&A, 627, 147 Google Scholar
Aalto, S., Falstad, N., Muller, S., et al. 2019, A&A, 627, 147 Google Scholar
Barcos-Muñoz, L., Aalto, S., Thompson, T. A., et al. 2019, ApJ, 853, 28 10.3847/2041-8213/aaa28dCrossRefGoogle Scholar
Baan, W. A., Henkel, C., Haschick, A. D., 1987, ApJ, 320, 154 10.1086/165531CrossRefGoogle Scholar
Baan, W. A., Salzer, J.J., LeWinter, R. D., 1998, ApJ, 509, 633 10.1086/306504CrossRefGoogle Scholar
Baan, W. A., & Klöckner, H. -R., 2006, A&A, 449, 559 Google Scholar
Baan, W. A., An, T., Klöckner, H. -R., Thomasson, P., 2017, MNRAS, 469, 916 10.1093/mnras/stx895CrossRefGoogle Scholar
Falstad, N., Gonzalez-Alfonso, E., Aalto, S., et al. 2015, A&A, 580, 52 Google Scholar
Falstad, N., Aalto, S., Mangum, J. G., et al. 2018, A&A, 609, 75 Google Scholar
Falstad, N., Aalto, S., König, S., et al. 2021, A&A, 649, 105 Google Scholar
Katgert, P., Mazure, A., den Hartog, R., et al. 2015, A&AS, 129, 399 Google Scholar
Martin, J. M., Bottinelli, L., Dennefeld, C., et al. 1988, A&A,195, 71Google Scholar
McBride, J., Heiles, C., Elitzur, M. 2013, ApJ, 774, 35 10.1088/0004-637X/774/1/35CrossRefGoogle Scholar
Mirabel, I.F., & Sanders, D. B., 1986, ApJ, 322, 688 10.1086/165764CrossRefGoogle Scholar
Sakamoto, K., Aalto, S., Evans, A., et al. 2010, ApJ, 725, 228 10.1088/2041-8205/725/2/L228CrossRefGoogle Scholar
Sanders, D., B., J. M., Mazzarella, Kim, D.-C., et al. 2003, AJ, 126, 1607 10.1086/376841CrossRefGoogle Scholar
Scoville, N. Z., Evans, A. S., Thompson, R, et al. 2000, AJ, 119, 991 10.1086/301248CrossRefGoogle Scholar
van der Walt, D. J., & Mfulwane, L. L., 2022, A&A, 657, 63 Google Scholar
Veilleux, S., Maiolino, R., Bollatto, A., Aalto, S., 2020, A&AR, 28, 1 Google Scholar
Yang, C., Aalto, S., König, S., et al. 2023, in arXiv e-prints, arXiv:2307.07641Google Scholar