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Galactic neutral hydrogen and the magnetic ISM foreground

Published online by Cambridge University Press:  08 May 2018

S.E. Clark Open the ORCID record for S.E. Clark [Opens in a new window]
S.E. Clark*
Affiliation:
Institute for Advanced Study, 1 Einstein Drive, Princeton, New Jersey, USA email: [email protected] Hubble Fellow
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Abstract

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The interstellar medium is suffused with magnetic fields, which inform the shape of structures in the diffuse gas. Recent high-dynamic range observations of Galactic neutral hydrogen, combined with novel data analysis techniques, have revealed a deep link between the morphology of neutral gas and the ambient magnetic field. At the same time, an observational revolution is underway in low-frequency radio polarimetry, driven in part by the need to characterize foregrounds to the cosmological 21-cm signal. A new generation of experiments, capable of high angular and Faraday depth resolution, are revealing complex filamentary structures in diffuse polarization. The relationship between filamentary structures observed in radio-polarimetric data and those observed in atomic hydrogen is not yet well understood. Multiwavelength observations will enable new insights into the magnetic interstellar medium across phases.

Keywords

magnetic fieldspolarizationISM: structureISM: magnetic fieldscosmology: observations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S333: Peering towards Cosmic Dawn , October 2017 , pp. 146 - 150
Copyright
Copyright © International Astronomical Union 2018 

References

Bekhti, B. N., Flöer, L., Keller, R., Kerp, J., Lenz, D., Winkel, B., Bailin, J., Calabretta, M. R., Dedes, L., Ford, H. A., Gibson, B. K., Haud, U., Janowiecki, S., Kalberla, P. M. W., Lockman, F. J., McClure-Griffiths, N. M., Murphy, T., Nakanishi, H., Pisano, D. J., & Staveley-Smith, L. A&A, 594, 116Google Scholar
Clark, S. E., Peek, J. E. G., & Putman, M. E., 2014, ApJ, 789, 82CrossRefGoogle Scholar
Clark, S. E., Hill, J. C., Peek, J. E. G., Putman, M. E. & Babler, B. 2015, Phys. Rev. Lett.,115, 241302Google Scholar
Clark, S. E., 2018, arXiv:1802.00011Google Scholar
Cox, D. P. & Reynolds, R. J., 1987, A&ARv, 25, 303Google Scholar
Green, G. M., Schlafly, E. F., Finkbeiner, D. P., Rix, H.-W., Martin, N., Burgett, W., Draper, P. W., Flewelling, H., Hodapp, K., Kaiser, N., Kudritzki, R. P., Magnier, E., Metcalfe, N., Price, P., Tonry, J., & Wainscoat, R., 2015, ApJ, 810, 25Google Scholar
Jelić, V., Zaroubi, S., Labropoulos, P., Bernardi, G., de Bruyn, A. G., & Koopmans, L.V. E., 2010 MNRAS, 409, 1647CrossRefGoogle Scholar
Jelić, V., de Bruyn, A. G., Mevius, M., Abdalla, F. B., Asad, K. M. B., Bernardi, G., Brentjens, M. A., Bus, S., Chapman, E., Ciardi, B., Daiboo, S., Fernandez, E. R., Ghosh, A., Harker, G., Jensen, H., Kazemi, S., Koopmans, L. V. E., Labropoulos, P., Martinez-Rubi, O., Mellema, G., Offringa, A. R., Pandey, V. N., Patil, A. H., Thomas, R. M., Vedantham, H. K., Veligatla, V., Yatawatta, S., Zaroubi, S., et al., 2014 A&A, 568, 101Google Scholar
Jelić, V., de Bruyn, A. G., Pandey, V. N., et al. 2015, A&A, 583, A137Google Scholar
Kalberla, P. M. W. & Kerp, J., 2016, A&A, 595, 37Google Scholar
Kalberla, P. M. W., Kerp, J., Haud, U., Winkel, B., Ben Bekhti, N., Flöer, L., & Lenz, D., 2016, ApJ, 821, 2CrossRefGoogle Scholar
Kalberla, P. M. W., Kerp, J., Haud, U., & Haverkorn, M., 2017, A&A, 607, 15Google Scholar
Lallement, R., Welsh, B. Y., Vergely, J. L., Crifo, F., & Sfeir, D., 2003, A&A, 411, 447Google Scholar
Lenc, E., Gaensler, B. M., Sun, X. H., Sadler, E. M., Willis, A. G., Barry, N., Beardsley, A. P., Bell, M. E., Bernardi, G., Bowman, J. D., Briggs, F., Callingham, J. R., Cappallo, R. J., Carroll, P., Corey, B. E., de Oliveira-Costa, A., Deshpande, A. A., Dillon, J. S., Dwarkanath, K. S., Emrich, D., Ewall-Wice, A., Feng, L., For, B.-Q., Goeke, R., Greenhill, L. J., Hancock, P., Hazelton, B. J., Hewitt, J. N., Hindson, L., Hurley-Walker, N., Johnston-Hollitt, M., et al., 2016, ApJ, 830, 38Google Scholar
Peek, J. E. G., Heiles, C., Douglas, K. A., Lee, M.-Y., Grcevich, J., Stanimirović, S., Putman, M. E., Korpela, E. J., Gibson, S. J., Begum, A., Saul, D., Robishaw, T., & Krćo, M., 2011, ApJS, 194, 20CrossRefGoogle Scholar
Peek, J. E. G., Babler, B. L., Zheng, Y., Clark, S. E., Douglas, K. A., Korpela, E. J., Putman, M. E., Stanimirović, S., Gibson, S. J., & Heiles, C., 2017, ApJS, acceptedGoogle Scholar
Van Eck, C. L., Haverkorn, M., Alves, M. I. R., Beck, R., de Bruyn, A. G., Enßlin, T., Farnes, J. S., Ferrière, K., Heald, G., Horellou, C., Horneffer, A., Iacobelli, M., Jelić, V., Martí-Vidal, I., Mulcahy, D. D., Reich, W., Röttgering, H. J. A., Scaife, A. M. M., Schnitzeler, D. H. F. M., Sobey, C., & Sridhar, S. S., 2017, A&A, 597, 98Google Scholar
Winkel, B., Kerp, J., Flöer, L., Kalberla, P. M. W., Ben Bekhti, N., Keller, R., & Lenz, D., 2016, A&A, 585, 41Google Scholar
Zaroubi, S., Jelić, V., de Bruyn, A. G., de Bruyn, A. G., Boulanger, F., Bracco, A., Kooistra, R., Alves, M. I. R., Brentjens, M. A., Ferrière, K., Ghosh, T., Koopmans, L. V. E., Levrier, F., Miville-Deschênes, M.-A., Montier, L., Pandey, V. N., & Soler, J. D., 2015, MNRAS Letters, 454, L46Google Scholar