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. Bock; A. Boselli; M. Bradford; V. Buat; N. Castro-Rodriguez; P. Chanial; S. Charlot; L. Ciesla; D. L. Clements; A. Cooray; D. Cormier; L. 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. Rigby; H. Roussel; A. Rykala; N. Sacchi; M. Sauvage; B. Schulz; M.R.P. Schirm; M. W. L. Smith; L. Spinoglio; Jason 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. Bock, A. Boselli, M. Bradford, V. Buat, N. Castro-Rodriguez, P. Chanial, S. Charlot, L. Ciesla, D. L. Clements, A. Cooray, D. Cormier, L. 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. Rigby, H. Roussel, A. Rykala, N. Sacchi, M. Sauvage, B. Schulz, M.R.P. Schirm, M. W. L. Smith, L. Spinoglio, Jason 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.

Original language	English
Pages (from-to)	102-108
Number of pages	7
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 - 1 Nov 2010

Keywords

dust, extinction, galaxies: evolution, galaxies: individual: M81

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Davies, J. I., Wilson, C. D., Auld, R., Baes, M., Barlow, M. J., Bendo, G. J., Bock, 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{746e02aa20ed49609085cb057653e08e,

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.",

keywords = "dust, extinction, galaxies: evolution, galaxies: individual: M81",

author = "J.I. Davies and Wilson, {C. D.} and R. Auld and M. Baes and M.J. Barlow and Bendo, {G. J.} and 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 Clements, {D. L.} and A. Cooray and D. Cormier and L. 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 Page, {M. J.} and P. Panuzzo and A. Papageorgiou and T.J. Parkin and I. Perez-Fournon and M. Pohlen and N. Rangwala and E. Rigby and H. Roussel and A. Rykala and N. Sacchi and M. Sauvage and B. Schulz and M.R.P. Schirm and Smith, {M. W. L.} and L. Spinoglio and Jason Stevens and S. Srinivasan and M. Symeonidis and M. Trichas and M. Vaccari and L. Vigroux and H. Wozniak and Wright, {G. S.} and W.W. Zeilinger",

year = "2010",

month = nov,

day = "1",

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 (OUP)",

number = "1",

}

Davies, JI, Wilson, CD, Auld, R, Baes, M, Barlow, MJ, Bendo, GJ, Bock, J, 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, E, Roussel, H, Rykala, A, Sacchi, N, Sauvage, M, Schulz, B, Schirm, MRP, Smith, MWL, Spinoglio, L, Stevens, J, 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.

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, L.

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.

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, Jason

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 - 2010/11/1

Y1 - 2010/11/1

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.

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.

KW - dust, extinction, galaxies: evolution, galaxies: individual: M81

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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Keywords

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