On the origin of M81 group extended dust emission

J.I. Davies; C.D. Wilson; R. Auld; M. Baes; M.J. Barlow; G.J. Bendo; J.J. Bock; A. Boselli; M. Bradford; V. Buat; N. Castro-Rodriguez; P. Chanial; S. Charlot; L. Ciesla; D.L. Clements; A. Cooray; D. Cormier; Luca Cortese; E. Dwek; S.A. Eales; D. Elbaz; M. Galametz; F. Galliano; W.K. Gear; J. Glenn; H.L. Gomez; M. Griffin; S. Hony; K.G. Isaak; L.R. Levenson; N. Lu; S. Madden; B. O'Halloran; K. Okumura; S. Oliver; M.J. Page; P. Panuzzo; A. Papageorgiou; T.J. Parkin; I. Perez-Fournon; M. Pohlen; N. Rangwala; E.E. Rigby; H. Roussel; A. Rykala; N. Sacchi; M. Sauvage; B. Schulz; M.R.P. Schirm; M.W.L. Smith; L. Spinoglio; J.A. Stevens; S. Srinivasan; M. Symeonidis; M. Trichas; M. Vaccari; L. Vigroux; H. Wozniak; G.S. Wright; W.W. Zeilinger

doi:10.1111/j.1365-2966.2010.17774.x

On the origin of M81 group extended dust emission

J.I. Davies, C.D. Wilson, R. Auld, M. Baes, M.J. Barlow, G.J. Bendo, J.J. Bock, A. Boselli, M. Bradford, V. Buat, N. Castro-Rodriguez, P. Chanial, S. Charlot, L. Ciesla, D.L. Clements, A. Cooray, D. Cormier, Luca Cortese, E. Dwek, S.A. EalesD. Elbaz, M. Galametz, F. Galliano, W.K. Gear, J. Glenn, H.L. Gomez, M. Griffin, S. Hony, K.G. Isaak, L.R. Levenson, N. Lu, S. Madden, B. O'Halloran, K. Okumura, S. Oliver, M.J. Page, P. Panuzzo, A. Papageorgiou, T.J. Parkin, I. Perez-Fournon, M. Pohlen, N. Rangwala, E.E. Rigby, H. Roussel, A. Rykala, N. Sacchi, M. Sauvage, B. Schulz, M.R.P. Schirm, M.W.L. Smith, L. Spinoglio, J.A. Stevens, S. Srinivasan, M. Symeonidis, M. Trichas, M. Vaccari, L. Vigroux, H. Wozniak, G.S. Wright, W.W. Zeilinger

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Abstract

Galactic cirrus emission at far-infrared wavelengths affects many extragalactic observations. Separating this emission from that associated with extragalactic objects is both important and difficult. In this paper we discuss a particular case, the M81 group, and the identification of diffuse structures prominent in the infrared, but also detected at optical wavelengths. The origin of these structures has previously been controversial, ranging from them being the result of a past interaction between M81 and M82 or due to more local Galactic emission. We show that over an order of a few arcmin scales, the far-infrared (Herschel 250 μm) emission correlates spatially very well with a particular narrow-velocity (2-3 km s-1) component of the Galactic H i. We find no evidence that any of the far-infrared emission associated with these features actually originates in the M81 group. Thus we infer that the associated diffuse optical emission must be due to galactic light-back scattered off dust in our galaxy. Ultraviolet observations pick out young stellar associations around M81, but no detectable far-infrared emission. We consider in detail one of the Galactic cirrus features, finding that the far-infrared H i relation breaks down below arcmin scales and that at smaller scales there can be quite large dust-temperature variations. © 2010 The Authors. Monthly Notices of the Royal Astronomical Society © 2010 RAS.

Original language	English
Pages (from-to)	102-108
Journal	Monthly Notices of the Royal Astronomical Society
Volume	409
Issue number	1
DOIs	https://doi.org/10.1111/j.1365-2966.2010.17774.x
Publication status	Published - 2010

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10.1111/j.1365-2966.2010.17774.x

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Davies, J. I., Wilson, C. D., Auld, R., Baes, M., Barlow, M. J., Bendo, G. J., Bock, J. J., Boselli, A., Bradford, M., Buat, V., Castro-Rodriguez, N., Chanial, P., Charlot, S., Ciesla, L., Clements, D. L., Cooray, A., Cormier, D., Cortese, L., Dwek, E., ... Zeilinger, W. W. (2010). On the origin of M81 group extended dust emission. Monthly Notices of the Royal Astronomical Society, 409(1), 102-108. https://doi.org/10.1111/j.1365-2966.2010.17774.x

@article{ae5d3b2e634a4642b0ef1b97742c410e,

title = "On the origin of M81 group extended dust emission",

abstract = "Galactic cirrus emission at far-infrared wavelengths affects many extragalactic observations. Separating this emission from that associated with extragalactic objects is both important and difficult. In this paper we discuss a particular case, the M81 group, and the identification of diffuse structures prominent in the infrared, but also detected at optical wavelengths. The origin of these structures has previously been controversial, ranging from them being the result of a past interaction between M81 and M82 or due to more local Galactic emission. We show that over an order of a few arcmin scales, the far-infrared (Herschel 250 μm) emission correlates spatially very well with a particular narrow-velocity (2-3 km s-1) component of the Galactic H i. We find no evidence that any of the far-infrared emission associated with these features actually originates in the M81 group. Thus we infer that the associated diffuse optical emission must be due to galactic light-back scattered off dust in our galaxy. Ultraviolet observations pick out young stellar associations around M81, but no detectable far-infrared emission. We consider in detail one of the Galactic cirrus features, finding that the far-infrared H i relation breaks down below arcmin scales and that at smaller scales there can be quite large dust-temperature variations. {\textcopyright} 2010 The Authors. Monthly Notices of the Royal Astronomical Society {\textcopyright} 2010 RAS.",

author = "J.I. Davies and C.D. Wilson and R. Auld and M. Baes and M.J. Barlow and G.J. Bendo and J.J. Bock and A. Boselli and M. Bradford and V. Buat and N. Castro-Rodriguez and P. Chanial and S. Charlot and L. Ciesla and D.L. Clements and A. Cooray and D. Cormier and Luca Cortese and E. Dwek and S.A. Eales and D. Elbaz and M. Galametz and F. Galliano and W.K. Gear and J. Glenn and H.L. Gomez and M. Griffin and S. Hony and K.G. Isaak and L.R. Levenson and N. Lu and S. Madden and B. O'Halloran and K. Okumura and S. Oliver and M.J. Page and P. Panuzzo and A. Papageorgiou and T.J. Parkin and I. Perez-Fournon and M. Pohlen and N. Rangwala and E.E. Rigby and H. Roussel and A. Rykala and N. Sacchi and M. Sauvage and B. Schulz and M.R.P. Schirm and M.W.L. Smith and L. Spinoglio and J.A. Stevens and S. Srinivasan and M. Symeonidis and M. Trichas and M. Vaccari and L. Vigroux and H. Wozniak and G.S. Wright and W.W. Zeilinger",

year = "2010",

doi = "10.1111/j.1365-2966.2010.17774.x",

language = "English",

volume = "409",

pages = "102--108",

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

issn = "0035-8711",

publisher = "Oxford University Press",

number = "1",

}

Davies, JI, Wilson, CD, Auld, R, Baes, M, Barlow, MJ, Bendo, GJ, Bock, JJ, Boselli, A, Bradford, M, Buat, V, Castro-Rodriguez, N, Chanial, P, Charlot, S, Ciesla, L, Clements, DL, Cooray, A, Cormier, D, Cortese, L, Dwek, E, Eales, SA, Elbaz, D, Galametz, M, Galliano, F, Gear, WK, Glenn, J, Gomez, HL, Griffin, M, Hony, S, Isaak, KG, Levenson, LR, Lu, N, Madden, S, O'Halloran, B, Okumura, K, Oliver, S, Page, MJ, Panuzzo, P, Papageorgiou, A, Parkin, TJ, Perez-Fournon, I, Pohlen, M, Rangwala, N, Rigby, EE, Roussel, H, Rykala, A, Sacchi, N, Sauvage, M, Schulz, B, Schirm, MRP, Smith, MWL, Spinoglio, L, Stevens, JA, Srinivasan, S, Symeonidis, M, Trichas, M, Vaccari, M, Vigroux, L, Wozniak, H, Wright, GS & Zeilinger, WW 2010, 'On the origin of M81 group extended dust emission', Monthly Notices of the Royal Astronomical Society, vol. 409, no. 1, pp. 102-108. https://doi.org/10.1111/j.1365-2966.2010.17774.x

TY - JOUR

T1 - On the origin of M81 group extended dust emission

AU - Davies, J.I.

AU - Wilson, C.D.

AU - Auld, R.

AU - Baes, M.

AU - Barlow, M.J.

AU - Bendo, G.J.

AU - Bock, J.J.

AU - Boselli, A.

AU - Bradford, M.

AU - Buat, V.

AU - Castro-Rodriguez, N.

AU - Chanial, P.

AU - Charlot, S.

AU - Ciesla, L.

AU - Clements, D.L.

AU - Cooray, A.

AU - Cormier, D.

AU - Cortese, Luca

AU - Dwek, E.

AU - Eales, S.A.

AU - Elbaz, D.

AU - Galametz, M.

AU - Galliano, F.

AU - Gear, W.K.

AU - Glenn, J.

AU - Gomez, H.L.

AU - Griffin, M.

AU - Hony, S.

AU - Isaak, K.G.

AU - Levenson, L.R.

AU - Lu, N.

AU - Madden, S.

AU - O'Halloran, B.

AU - Okumura, K.

AU - Oliver, S.

AU - Page, M.J.

AU - Panuzzo, P.

AU - Papageorgiou, A.

AU - Parkin, T.J.

AU - Perez-Fournon, I.

AU - Pohlen, M.

AU - Rangwala, N.

AU - Rigby, E.E.

AU - Roussel, H.

AU - Rykala, A.

AU - Sacchi, N.

AU - Sauvage, M.

AU - Schulz, B.

AU - Schirm, M.R.P.

AU - Smith, M.W.L.

AU - Spinoglio, L.

AU - Stevens, J.A.

AU - Srinivasan, S.

AU - Symeonidis, M.

AU - Trichas, M.

AU - Vaccari, M.

AU - Vigroux, L.

AU - Wozniak, H.

AU - Wright, G.S.

AU - Zeilinger, W.W.

PY - 2010

Y1 - 2010

N2 - Galactic cirrus emission at far-infrared wavelengths affects many extragalactic observations. Separating this emission from that associated with extragalactic objects is both important and difficult. In this paper we discuss a particular case, the M81 group, and the identification of diffuse structures prominent in the infrared, but also detected at optical wavelengths. The origin of these structures has previously been controversial, ranging from them being the result of a past interaction between M81 and M82 or due to more local Galactic emission. We show that over an order of a few arcmin scales, the far-infrared (Herschel 250 μm) emission correlates spatially very well with a particular narrow-velocity (2-3 km s-1) component of the Galactic H i. We find no evidence that any of the far-infrared emission associated with these features actually originates in the M81 group. Thus we infer that the associated diffuse optical emission must be due to galactic light-back scattered off dust in our galaxy. Ultraviolet observations pick out young stellar associations around M81, but no detectable far-infrared emission. We consider in detail one of the Galactic cirrus features, finding that the far-infrared H i relation breaks down below arcmin scales and that at smaller scales there can be quite large dust-temperature variations. © 2010 The Authors. Monthly Notices of the Royal Astronomical Society © 2010 RAS.

AB - Galactic cirrus emission at far-infrared wavelengths affects many extragalactic observations. Separating this emission from that associated with extragalactic objects is both important and difficult. In this paper we discuss a particular case, the M81 group, and the identification of diffuse structures prominent in the infrared, but also detected at optical wavelengths. The origin of these structures has previously been controversial, ranging from them being the result of a past interaction between M81 and M82 or due to more local Galactic emission. We show that over an order of a few arcmin scales, the far-infrared (Herschel 250 μm) emission correlates spatially very well with a particular narrow-velocity (2-3 km s-1) component of the Galactic H i. We find no evidence that any of the far-infrared emission associated with these features actually originates in the M81 group. Thus we infer that the associated diffuse optical emission must be due to galactic light-back scattered off dust in our galaxy. Ultraviolet observations pick out young stellar associations around M81, but no detectable far-infrared emission. We consider in detail one of the Galactic cirrus features, finding that the far-infrared H i relation breaks down below arcmin scales and that at smaller scales there can be quite large dust-temperature variations. © 2010 The Authors. Monthly Notices of the Royal Astronomical Society © 2010 RAS.

U2 - 10.1111/j.1365-2966.2010.17774.x

DO - 10.1111/j.1365-2966.2010.17774.x

M3 - Article

SN - 0035-8711

VL - 409

SP - 102

EP - 108

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

On the origin of M81 group extended dust emission

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