ASKAP HI imaging of the galaxy group IC 1459

P. Serra; B. Koribalski; V. Kilborn; J.R. Allison; S.W. Amy; L. Ball; K. Bannister; M.E. Bell; D.C.J. Bock; R. Bolton; M. Bowen; B. Boyle; S. Broadhurst; D. Brodrick; M. Brothers; J.D. Bunton; J. Chapman; W. Cheng; A.P. Chippendale; Y. Chung; F. Cooray; T. Cornwell; D. Deboer; P. Diamond; R. Forsyth; R. Gough; N. Gupta; G.A. Hampson; L. Harvey-Smith; S. Hay; D.B. Hayman; I. Heywood; A.W. Hotan; S. Hoyle; B. Humphreys; B. Indermuehle; C. Jacka; C.A. Jackson; S. Jackson; K. Jeganathan; S. Johnston; J. Joseph; P. Kamphuis; M. Leach; E. Lenc; E. Lensson; S. Mackay; M. Marquarding; J. Marvil; N. Mcclure-Griffiths; D. Mcconnell; Martin Meyer; P. Mirtschin; S. Neuhold; A. Ng; R.P. Norris; J. O'Sullivan; J. Pathikulangara; S. Pearce; C. Phillips; Attila Popping; R.Y. Qiao; J.E. Reynolds; P. Roberts; A.E.T. Schinckel; R.J. Sault; R. Shaw; T.W. Shimwell; Lister Staveley-Smith; M. Storey; A.W. Sweetnam; E. Troup; A. Tzioumis; M.A. Voronkov; Tobias Westmeier; M. Whiting; C. Wilson; Ivy Wong; X. Wu

doi:10.1093/mnras/stv1326

ASKAP HI imaging of the galaxy group IC 1459

P. Serra, B. Koribalski, V. Kilborn, J.R. Allison, S.W. Amy, L. Ball, K. Bannister, M.E. Bell, D.C.J. Bock, R. Bolton, M. Bowen, B. Boyle, S. Broadhurst, D. Brodrick, M. Brothers, J.D. Bunton, J. Chapman, W. Cheng, A.P. Chippendale, Y. ChungF. Cooray, T. Cornwell, D. Deboer, P. Diamond, R. Forsyth, R. Gough, N. Gupta, G.A. Hampson, L. Harvey-Smith, S. Hay, D.B. Hayman, I. Heywood, A.W. Hotan, S. Hoyle, B. Humphreys, B. Indermuehle, C. Jacka, C.A. Jackson, S. Jackson, K. Jeganathan, S. Johnston, J. Joseph, P. Kamphuis, M. Leach, E. Lenc, E. Lensson, S. Mackay, M. Marquarding, J. Marvil, N. Mcclure-Griffiths, D. Mcconnell, Martin Meyer, P. Mirtschin, S. Neuhold, A. Ng, R.P. Norris, J. O'Sullivan, J. Pathikulangara, S. Pearce, C. Phillips, Attila Popping, R.Y. Qiao, J.E. Reynolds, P. Roberts, A.E.T. Schinckel, R.J. Sault, R. Shaw, T.W. Shimwell, Lister Staveley-Smith, M. Storey, A.W. Sweetnam, E. Troup, A. Tzioumis, M.A. Voronkov, Tobias Westmeier, M. Whiting, C. Wilson, Ivy Wong, X. Wu

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Abstract

© 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.

Original language	English
Pages (from-to)	2680-2691
Journal	Monthly Notices of the Royal Astronomical Society
Volume	452
Issue number	3
Early online date	25 Jul 2015
DOIs	https://doi.org/10.1093/mnras/stv1326
Publication status	Published - 21 Sept 2015

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Serra et al., 2015 ASKAP HI imaging of the galaxy group IC 1459
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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Serra, P., Koribalski, B., Kilborn, V., Allison, J. R., Amy, S. W., Ball, L., Bannister, K., Bell, M. E., Bock, D. C. J., Bolton, R., Bowen, M., Boyle, B., Broadhurst, S., Brodrick, D., Brothers, M., Bunton, J. D., Chapman, J., Cheng, W., Chippendale, A. P., ... Wu, X. (2015). ASKAP HI imaging of the galaxy group IC 1459. Monthly Notices of the Royal Astronomical Society, 452(3), 2680-2691. https://doi.org/10.1093/mnras/stv1326

@article{e012762a03754591a098b7ec2abd9844,

title = "ASKAP HI imaging of the galaxy group IC 1459",

abstract = "{\textcopyright} 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.",

author = "P. Serra and B. Koribalski and V. Kilborn and J.R. Allison and S.W. Amy and L. Ball and K. Bannister and M.E. Bell and D.C.J. Bock and R. Bolton and M. Bowen and B. Boyle and S. Broadhurst and D. Brodrick and M. Brothers and J.D. Bunton and J. Chapman and W. Cheng and A.P. Chippendale and Y. Chung and F. Cooray and T. Cornwell and D. Deboer and P. Diamond and R. Forsyth and R. Gough and N. Gupta and G.A. Hampson and L. Harvey-Smith and S. Hay and D.B. Hayman and I. Heywood and A.W. Hotan and S. Hoyle and B. Humphreys and B. Indermuehle and C. Jacka and C.A. Jackson and S. Jackson and K. Jeganathan and S. Johnston and J. Joseph and P. Kamphuis and M. Leach and E. Lenc and E. Lensson and S. Mackay and M. Marquarding and J. Marvil and N. Mcclure-Griffiths and D. Mcconnell and Martin Meyer and P. Mirtschin and S. Neuhold and A. Ng and R.P. Norris and J. O'Sullivan and J. Pathikulangara and S. Pearce and C. Phillips and Attila Popping and R.Y. Qiao and J.E. Reynolds and P. Roberts and A.E.T. Schinckel and R.J. Sault and R. Shaw and T.W. Shimwell and Lister Staveley-Smith and M. Storey and A.W. Sweetnam and E. Troup and A. Tzioumis and M.A. Voronkov and Tobias Westmeier and M. Whiting and C. Wilson and Ivy Wong and X. Wu",

year = "2015",

month = sep,

day = "21",

doi = "10.1093/mnras/stv1326",

language = "English",

volume = "452",

pages = "2680--2691",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

}

Serra, P, Koribalski, B, Kilborn, V, Allison, JR, Amy, SW, Ball, L, Bannister, K, Bell, ME, Bock, DCJ, Bolton, R, Bowen, M, Boyle, B, Broadhurst, S, Brodrick, D, Brothers, M, Bunton, JD, Chapman, J, Cheng, W, Chippendale, AP, Chung, Y, Cooray, F, Cornwell, T, Deboer, D, Diamond, P, Forsyth, R, Gough, R, Gupta, N, Hampson, GA, Harvey-Smith, L, Hay, S, Hayman, DB, Heywood, I, Hotan, AW, Hoyle, S, Humphreys, B, Indermuehle, B, Jacka, C, Jackson, CA, 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, RP, O'Sullivan, J, Pathikulangara, J, Pearce, S, Phillips, C, Popping, A, Qiao, RY, Reynolds, JE, Roberts, P, Schinckel, AET, Sault, RJ, Shaw, R, Shimwell, TW, Staveley-Smith, L, Storey, M, Sweetnam, AW, Troup, E, Tzioumis, A, Voronkov, MA, Westmeier, T, Whiting, M, Wilson, C, Wong, I & Wu, X 2015, 'ASKAP HI imaging of the galaxy group IC 1459', Monthly Notices of the Royal Astronomical Society, vol. 452, no. 3, pp. 2680-2691. https://doi.org/10.1093/mnras/stv1326

TY - JOUR

T1 - ASKAP HI imaging of the galaxy group IC 1459

AU - Serra, P.

AU - Koribalski, B.

AU - Kilborn, V.

AU - Allison, J.R.

AU - Amy, S.W.

AU - Ball, L.

AU - Bannister, K.

AU - Bell, M.E.

AU - Bock, D.C.J.

AU - Bolton, R.

AU - Bowen, M.

AU - Boyle, B.

AU - Broadhurst, S.

AU - Brodrick, D.

AU - Brothers, M.

AU - Bunton, J.D.

AU - Chapman, J.

AU - Cheng, W.

AU - Chippendale, A.P.

AU - Chung, Y.

AU - Cooray, F.

AU - Cornwell, T.

AU - Deboer, D.

AU - Diamond, P.

AU - Forsyth, R.

AU - Gough, R.

AU - Gupta, N.

AU - Hampson, G.A.

AU - Harvey-Smith, L.

AU - Hay, S.

AU - Hayman, D.B.

AU - Heywood, I.

AU - Hotan, A.W.

AU - Hoyle, S.

AU - Humphreys, B.

AU - Indermuehle, B.

AU - Jacka, C.

AU - Jackson, C.A.

AU - Jackson, S.

AU - Jeganathan, K.

AU - Johnston, S.

AU - Joseph, J.

AU - Kamphuis, P.

AU - Leach, M.

AU - Lenc, E.

AU - Lensson, E.

AU - Mackay, S.

AU - Marquarding, M.

AU - Marvil, J.

AU - Mcclure-Griffiths, N.

AU - Mcconnell, D.

AU - Meyer, Martin

AU - Mirtschin, P.

AU - Neuhold, S.

AU - Ng, A.

AU - Norris, R.P.

AU - O'Sullivan, J.

AU - Pathikulangara, J.

AU - Pearce, S.

AU - Phillips, C.

AU - Popping, Attila

AU - Qiao, R.Y.

AU - Reynolds, J.E.

AU - Roberts, P.

AU - Schinckel, A.E.T.

AU - Sault, R.J.

AU - Shaw, R.

AU - Shimwell, T.W.

AU - Staveley-Smith, Lister

AU - Storey, M.

AU - Sweetnam, A.W.

AU - Troup, E.

AU - Tzioumis, A.

AU - Voronkov, M.A.

AU - Westmeier, Tobias

AU - Whiting, M.

AU - Wilson, C.

AU - Wong, Ivy

AU - Wu, X.

PY - 2015/9/21

Y1 - 2015/9/21

N2 - © 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.

AB - © 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.

U2 - 10.1093/mnras/stv1326

DO - 10.1093/mnras/stv1326

M3 - Article

SN - 0035-8711

VL - 452

SP - 2680

EP - 2691

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

ASKAP HI imaging of the galaxy group IC 1459

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