Infrared Array Camera (IRAC) observations of M81

S. P. Willner; M. L.N. Ashby; P. Barmby; G. G. Fazio; M. Pahre; H. A. Smith; Robert C. Kennicutt; Daniela Calzetti; Daniel A. Dale; B. T. Draine; Michael W. Regan; S. Malhotra; Michele D. Thornley; P. N. Appleton; D. Frayer; G. Helou; S. Stolovy; L. Storrie-Lombardi

doi:10.1086/422913

Infrared Array Camera (IRAC) observations of M81

S. P. Willner, M. L.N. Ashby, P. Barmby, G. G. Fazio, M. Pahre, H. A. Smith, Robert C. Kennicutt, Daniela Calzetti, Daniel A. Dale, B. T. Draine, Michael W. Regan, S. Malhotra, Michele D. Thornley, P. N. Appleton, D. Frayer, G. Helou, S. Stolovy, L. Storrie-Lombardi

Astrophysical Sciences

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Abstract

Infrared Array Camera (IRAC) images of M81 show three distinct morphological constituents: a smooth distribution of evolved stars with bulge, disk, and spiral arm components; a clumpy distribution of dust emission tracing the spiral arms; and a pointlike nuclear source. The bulge stellar colors are consistent with M-type giants, and the disk colors are consistent with a slightly younger population. The dust emission generally follows the blue and ultraviolet emission, but there are large areas that have dust emission without ultraviolet and smaller areas with ultraviolet but little dust emission. The former are presumably caused by extinction, and the latter may be due to cavities in the gas and dust created by supernova explosions. The nucleus appears fainter at 8 μm than expected from ground-based 10 μm observations made 4 years ago.

Original language	English (US)
Pages (from-to)	222-228
Number of pages	7
Journal	Astrophysical Journal, Supplement Series
Volume	154
Issue number	1
DOIs	https://doi.org/10.1086/422913
State	Published - Sep 2004

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Dust, extinction
Galaxies: ISM
Galaxies: Individual (M81)
Galaxies: Spiral
Galaxies: Stellar content
Infrared: Galaxies

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10.1086/422913

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Willner, S. P., Ashby, M. L. N., Barmby, P., Fazio, G. G., Pahre, M., Smith, H. A., Kennicutt, R. C., Calzetti, D., Dale, D. A., Draine, B. T., Regan, M. W., Malhotra, S., Thornley, M. D., Appleton, P. N., Frayer, D., Helou, G., Stolovy, S., & Storrie-Lombardi, L. (2004). Infrared Array Camera (IRAC) observations of M81. Astrophysical Journal, Supplement Series, 154(1), 222-228. https://doi.org/10.1086/422913

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title = "Infrared Array Camera (IRAC) observations of M81",

abstract = "Infrared Array Camera (IRAC) images of M81 show three distinct morphological constituents: a smooth distribution of evolved stars with bulge, disk, and spiral arm components; a clumpy distribution of dust emission tracing the spiral arms; and a pointlike nuclear source. The bulge stellar colors are consistent with M-type giants, and the disk colors are consistent with a slightly younger population. The dust emission generally follows the blue and ultraviolet emission, but there are large areas that have dust emission without ultraviolet and smaller areas with ultraviolet but little dust emission. The former are presumably caused by extinction, and the latter may be due to cavities in the gas and dust created by supernova explosions. The nucleus appears fainter at 8 μm than expected from ground-based 10 μm observations made 4 years ago.",

keywords = "Dust, extinction, Galaxies: ISM, Galaxies: Individual (M81), Galaxies: Spiral, Galaxies: Stellar content, Infrared: Galaxies",

author = "Willner, {S. P.} and Ashby, {M. L.N.} and P. Barmby and Fazio, {G. G.} and M. Pahre and Smith, {H. A.} and Kennicutt, {Robert C.} and Daniela Calzetti and Dale, {Daniel A.} and Draine, {B. T.} and Regan, {Michael W.} and S. Malhotra and Thornley, {Michele D.} and Appleton, {P. N.} and D. Frayer and G. Helou and S. Stolovy and L. Storrie-Lombardi",

year = "2004",

month = sep,

doi = "10.1086/422913",

language = "English (US)",

volume = "154",

pages = "222--228",

journal = "Astrophysical Journal, Supplement Series",

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publisher = "American Astronomical Society",

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}

Willner, SP, Ashby, MLN, Barmby, P, Fazio, GG, Pahre, M, Smith, HA, Kennicutt, RC, Calzetti, D, Dale, DA, Draine, BT, Regan, MW, Malhotra, S, Thornley, MD, Appleton, PN, Frayer, D, Helou, G, Stolovy, S & Storrie-Lombardi, L 2004, 'Infrared Array Camera (IRAC) observations of M81', Astrophysical Journal, Supplement Series, vol. 154, no. 1, pp. 222-228. https://doi.org/10.1086/422913

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T1 - Infrared Array Camera (IRAC) observations of M81

AU - Willner, S. P.

AU - Ashby, M. L.N.

AU - Barmby, P.

AU - Fazio, G. G.

AU - Pahre, M.

AU - Smith, H. A.

AU - Kennicutt, Robert C.

AU - Calzetti, Daniela

AU - Dale, Daniel A.

AU - Draine, B. T.

AU - Regan, Michael W.

AU - Malhotra, S.

AU - Thornley, Michele D.

AU - Appleton, P. N.

AU - Frayer, D.

AU - Helou, G.

AU - Stolovy, S.

AU - Storrie-Lombardi, L.

PY - 2004/9

Y1 - 2004/9

N2 - Infrared Array Camera (IRAC) images of M81 show three distinct morphological constituents: a smooth distribution of evolved stars with bulge, disk, and spiral arm components; a clumpy distribution of dust emission tracing the spiral arms; and a pointlike nuclear source. The bulge stellar colors are consistent with M-type giants, and the disk colors are consistent with a slightly younger population. The dust emission generally follows the blue and ultraviolet emission, but there are large areas that have dust emission without ultraviolet and smaller areas with ultraviolet but little dust emission. The former are presumably caused by extinction, and the latter may be due to cavities in the gas and dust created by supernova explosions. The nucleus appears fainter at 8 μm than expected from ground-based 10 μm observations made 4 years ago.

AB - Infrared Array Camera (IRAC) images of M81 show three distinct morphological constituents: a smooth distribution of evolved stars with bulge, disk, and spiral arm components; a clumpy distribution of dust emission tracing the spiral arms; and a pointlike nuclear source. The bulge stellar colors are consistent with M-type giants, and the disk colors are consistent with a slightly younger population. The dust emission generally follows the blue and ultraviolet emission, but there are large areas that have dust emission without ultraviolet and smaller areas with ultraviolet but little dust emission. The former are presumably caused by extinction, and the latter may be due to cavities in the gas and dust created by supernova explosions. The nucleus appears fainter at 8 μm than expected from ground-based 10 μm observations made 4 years ago.

KW - Dust, extinction

KW - Galaxies: ISM

KW - Galaxies: Individual (M81)

KW - Galaxies: Spiral

KW - Galaxies: Stellar content

KW - Infrared: Galaxies

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SN - 0067-0049

VL - 154

SP - 222

EP - 228

JO - Astrophysical Journal, Supplement Series

JF - Astrophysical Journal, Supplement Series

IS - 1

ER -

Infrared Array Camera (IRAC) observations of M81

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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