ASKAP HI imaging of the galaxy group IC 1459

© 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. We present HI imaging of the galaxy group IC 1459 carried out with six antennas of the Australian Square Kilometre Array Pathfinder equipped with phased-array feeds. We detect and resolve HI in 11 g...

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Main Authors:	Serra, P., Koribalski, B., Kilborn, V., Allison, J., Amy, S., Ball, L., Bannister, K., Bell, M., Bock, D., Bolton, R., Bowen, M., Boyle, B., Broadhurst, S., Brodrick, D., Brothers, M., Bunton, J., Chapman, J., Cheng, W., Chippendale, A., Chung, Y., Cooray, F., Cornwell, T., DeBoer, D., Diamond, P., Forsyth, R., Gough, R., Gupta, N., Hampson, G., Harvey-Smith, L., Hay, S., Hayman, D., Heywood, I., Hotan, A., Hoyle, S., Humphreys, B., Indermuehle, B., Jacka, C., Jackson, Carole, Jackson, S., Jeganathan, K., Johnston, S., Joseph, J., Kamphuis, P., Leach, M., Lenc, E., Lensson, E., Mackay, S., Marquarding, M., Marvil, J., McClure-Griffiths, N., McConnell, D., Meyer, M., Mirtschin, P., Neuhold, S., Ng, A., Norris, R., O'Sullivan, J., Pathikulangara, J., Pearce, S., Phillips, C., Popping, A., Qiao, R., Reynolds, J., Roberts, P., Sault, R., Schinckel, A., Shaw, R., Shimwell, T., Staveley-Smith, L., Storey, M., Sweetnam, A., Troup, E., Tzioumis, A., Voronkov, M., Westmeier, T., Whiting, M., Wilson, C., Wong, O., Wu, X.
Format:	Journal Article
Published:	OXFORD UNIV PRESS 2015
Online Access:	http://hdl.handle.net/20.500.11937/22165

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author	Serra, P. Koribalski, B. Kilborn, V. Allison, J. Amy, S. Ball, L. Bannister, K. Bell, M. Bock, D. Bolton, R. Bowen, M. Boyle, B. Broadhurst, S. Brodrick, D. Brothers, M. Bunton, J. Chapman, J. Cheng, W. Chippendale, A. Chung, Y. Cooray, F. Cornwell, T. DeBoer, D. Diamond, P. Forsyth, R. Gough, R. Gupta, N. Hampson, G. Harvey-Smith, L. Hay, S. Hayman, D. Heywood, I. Hotan, A. Hoyle, S. Humphreys, B. Indermuehle, B. Jacka, C. Jackson, Carole Jackson, S. Jeganathan, K. Johnston, S. Joseph, J. Kamphuis, P. Leach, M. Lenc, E. Lensson, E. Mackay, S. Marquarding, M. Marvil, J. McClure-Griffiths, N. McConnell, D. Meyer, M. Mirtschin, P. Neuhold, S. Ng, A. Norris, R. O'Sullivan, J. Pathikulangara, J. Pearce, S. Phillips, C. Popping, A. Qiao, R. Reynolds, J. Roberts, P. Sault, R. Schinckel, A. Shaw, R. Shimwell, T. Staveley-Smith, L. Storey, M. Sweetnam, A. Troup, E. Tzioumis, A. Voronkov, M. Westmeier, T. Whiting, M. Wilson, C. Wong, O. Wu, X.
author_facet	Serra, P. Koribalski, B. Kilborn, V. Allison, J. Amy, S. Ball, L. Bannister, K. Bell, M. Bock, D. Bolton, R. Bowen, M. Boyle, B. Broadhurst, S. Brodrick, D. Brothers, M. Bunton, J. Chapman, J. Cheng, W. Chippendale, A. Chung, Y. Cooray, F. Cornwell, T. DeBoer, D. Diamond, P. Forsyth, R. Gough, R. Gupta, N. Hampson, G. Harvey-Smith, L. Hay, S. Hayman, D. Heywood, I. Hotan, A. Hoyle, S. Humphreys, B. Indermuehle, B. Jacka, C. Jackson, Carole Jackson, S. Jeganathan, K. Johnston, S. Joseph, J. Kamphuis, P. Leach, M. Lenc, E. Lensson, E. Mackay, S. Marquarding, M. Marvil, J. McClure-Griffiths, N. McConnell, D. Meyer, M. Mirtschin, P. Neuhold, S. Ng, A. Norris, R. O'Sullivan, J. Pathikulangara, J. Pearce, S. Phillips, C. Popping, A. Qiao, R. Reynolds, J. Roberts, P. Sault, R. Schinckel, A. Shaw, R. Shimwell, T. Staveley-Smith, L. Storey, M. Sweetnam, A. Troup, E. Tzioumis, A. Voronkov, M. Westmeier, T. Whiting, M. Wilson, C. Wong, O. Wu, X.
author_sort	Serra, P.
building	Curtin Institutional Repository
collection	Online Access
description	© 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. We present HI imaging of the galaxy group IC 1459 carried out with six antennas of the Australian Square Kilometre Array Pathfinder equipped with phased-array feeds. We detect and resolve HI in 11 galaxies down to a column density of ~1020 cm-2 inside a ~6 deg2 field and with a resolution of ~1 arcmin on the sky and ~8 kms-1 in velocity. We present HI images, velocity fields and integrated spectra of all detections, and highlight the discovery of three HI clouds - two in the proximity of the galaxy IC 5270 and one close to NGC 7418. Each cloud has an HI mass of ~109 M? and accounts for ~15 per cent of the HI associated with its host galaxy. Available images at ultraviolet, optical and infrared wavelengths do not reveal any clear stellar counterpart of any of the clouds, suggesting that they are not gas-rich dwarf neighbours of IC 5270 and NGC 7418. Using Parkes data, we find evidence of additional extended, low-column-density HI emission around IC 5270, indicating that the clouds are the tip of the iceberg of a larger system of gas surrounding this galaxy. This result adds to the body of evidence on the presence of intragroup gas within the IC 1459 group. Altogether, the HI found outside galaxies in this group amounts to several times 109 M?, at least 10 per cent of the HI contained inside galaxies. This suggests a substantial flow of gas in and out of galaxies during the several billion years of the group's evolution.
first_indexed	2025-11-14T07:42:29Z
format	Journal Article
id	curtin-20.500.11937-22165
institution	Curtin University Malaysia
institution_category	Local University
last_indexed	2025-11-14T07:42:29Z
publishDate	2015
publisher	OXFORD UNIV PRESS
recordtype	eprints
repository_type	Digital Repository
spelling	curtin-20.500.11937-221652017-09-13T13:51:44Z ASKAP HI imaging of the galaxy group IC 1459 Serra, P. Koribalski, B. Kilborn, V. Allison, J. Amy, S. Ball, L. Bannister, K. Bell, M. Bock, D. Bolton, R. Bowen, M. Boyle, B. Broadhurst, S. Brodrick, D. Brothers, M. Bunton, J. Chapman, J. Cheng, W. Chippendale, A. Chung, Y. Cooray, F. Cornwell, T. DeBoer, D. Diamond, P. Forsyth, R. Gough, R. Gupta, N. Hampson, G. Harvey-Smith, L. Hay, S. Hayman, D. Heywood, I. Hotan, A. Hoyle, S. Humphreys, B. Indermuehle, B. Jacka, C. Jackson, Carole Jackson, S. Jeganathan, K. Johnston, S. Joseph, J. Kamphuis, P. Leach, M. Lenc, E. Lensson, E. Mackay, S. Marquarding, M. Marvil, J. McClure-Griffiths, N. McConnell, D. Meyer, M. Mirtschin, P. Neuhold, S. Ng, A. Norris, R. O'Sullivan, J. Pathikulangara, J. Pearce, S. Phillips, C. Popping, A. Qiao, R. Reynolds, J. Roberts, P. Sault, R. Schinckel, A. Shaw, R. Shimwell, T. Staveley-Smith, L. Storey, M. Sweetnam, A. Troup, E. Tzioumis, A. Voronkov, M. Westmeier, T. Whiting, M. Wilson, C. Wong, O. Wu, X. © 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. We present HI imaging of the galaxy group IC 1459 carried out with six antennas of the Australian Square Kilometre Array Pathfinder equipped with phased-array feeds. We detect and resolve HI in 11 galaxies down to a column density of ~1020 cm-2 inside a ~6 deg2 field and with a resolution of ~1 arcmin on the sky and ~8 kms-1 in velocity. We present HI images, velocity fields and integrated spectra of all detections, and highlight the discovery of three HI clouds - two in the proximity of the galaxy IC 5270 and one close to NGC 7418. Each cloud has an HI mass of ~109 M? and accounts for ~15 per cent of the HI associated with its host galaxy. Available images at ultraviolet, optical and infrared wavelengths do not reveal any clear stellar counterpart of any of the clouds, suggesting that they are not gas-rich dwarf neighbours of IC 5270 and NGC 7418. Using Parkes data, we find evidence of additional extended, low-column-density HI emission around IC 5270, indicating that the clouds are the tip of the iceberg of a larger system of gas surrounding this galaxy. This result adds to the body of evidence on the presence of intragroup gas within the IC 1459 group. Altogether, the HI found outside galaxies in this group amounts to several times 109 M?, at least 10 per cent of the HI contained inside galaxies. This suggests a substantial flow of gas in and out of galaxies during the several billion years of the group's evolution. 2015 Journal Article http://hdl.handle.net/20.500.11937/22165 10.1093/mnras/stv1326 OXFORD UNIV PRESS fulltext
spellingShingle	Serra, P. Koribalski, B. Kilborn, V. Allison, J. Amy, S. Ball, L. Bannister, K. Bell, M. Bock, D. Bolton, R. Bowen, M. Boyle, B. Broadhurst, S. Brodrick, D. Brothers, M. Bunton, J. Chapman, J. Cheng, W. Chippendale, A. Chung, Y. Cooray, F. Cornwell, T. DeBoer, D. Diamond, P. Forsyth, R. Gough, R. Gupta, N. Hampson, G. Harvey-Smith, L. Hay, S. Hayman, D. Heywood, I. Hotan, A. Hoyle, S. Humphreys, B. Indermuehle, B. Jacka, C. Jackson, Carole Jackson, S. Jeganathan, K. Johnston, S. Joseph, J. Kamphuis, P. Leach, M. Lenc, E. Lensson, E. Mackay, S. Marquarding, M. Marvil, J. McClure-Griffiths, N. McConnell, D. Meyer, M. Mirtschin, P. Neuhold, S. Ng, A. Norris, R. O'Sullivan, J. Pathikulangara, J. Pearce, S. Phillips, C. Popping, A. Qiao, R. Reynolds, J. Roberts, P. Sault, R. Schinckel, A. Shaw, R. Shimwell, T. Staveley-Smith, L. Storey, M. Sweetnam, A. Troup, E. Tzioumis, A. Voronkov, M. Westmeier, T. Whiting, M. Wilson, C. Wong, O. Wu, X. ASKAP HI imaging of the galaxy group IC 1459
title	ASKAP HI imaging of the galaxy group IC 1459
title_full	ASKAP HI imaging of the galaxy group IC 1459
title_fullStr	ASKAP HI imaging of the galaxy group IC 1459
title_full_unstemmed	ASKAP HI imaging of the galaxy group IC 1459
title_short	ASKAP HI imaging of the galaxy group IC 1459
title_sort	askap hi imaging of the galaxy group ic 1459
url	http://hdl.handle.net/20.500.11937/22165

ASKAP HI imaging of the galaxy group IC 1459

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