Spatially Resolved Ultraviolet, Hα, Infrared, and Radio Star Formation in M81 | Zendy

Karl D. Gordon | Zendy; Pablo G. PérezGonzález | Zendy; K. A. Misselt | Zendy; E. J. Murphy | Zendy; G. J. Bendo | Zendy; Fabian Walter | Zendy; M. D. Thornley | Zendy; R. C. Kennicutt | Zendy; G. H. Rieke | Zendy; C. W. Engelbracht | Zendy; J. D. Smith | Zendy; A. AlonsoHerrero | Zendy; P. N. Appleton | Zendy; Daniela Calzetti | Zendy; Daniel A. Dale | Zendy; B. T. Draine | Zendy; D. T. Frayer | Zendy; G. Hélou | Zendy; J. L. Hinz | Zendy; Dean C. Hines | Zendy; Douglas Kelly | Zendy; J. E. Morrison | Zendy; James Muzerolle | Zendy; Michael W. Regan | Zendy; J. A. Stansberry | Zendy; S. Stolovy | Zendy; Lisa J. StorrieLombardi | Zendy; K. Y. L. Su | Zendy; Erick T. Young | Zendy

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Spatially Resolved Ultraviolet, Hα, Infrared, and Radio Star Formation in M81

Author(s) -

Karl D. Gordon,

Pablo G. PérezGonzález,

K. A. Misselt,

E. J. Murphy,

G. J. Bendo,

Fabian Walter,

M. D. Thornley,

R. C. Kennicutt,

G. H. Rieke,

C. W. Engelbracht,

J. D. Smith,

A. AlonsoHerrero,

P. N. Appleton,

Daniela Calzetti,

Daniel A. Dale,

B. T. Draine,

D. T. Frayer,

G. Hélou,

J. L. Hinz,

Dean C. Hines,

Douglas Kelly,

J. E. Morrison,

James Muzerolle,

Michael W. Regan,

J. A. Stansberry,

S. Stolovy,

Lisa J. StorrieLombardi,

K. Y. L. Su,

Erick T. Young

Publication year - 2004

Publication title -

the astrophysical journal supplement series

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.546

H-Index - 277

eISSN - 1538-4365

pISSN - 0067-0049

DOI - 10.1086/422714

Subject(s) - star formation , astrophysics , infrared , galaxy , ultraviolet , spiral galaxy , attenuation , physics , luminous infrared galaxy , astronomy , optics

We present Multiband Imaging Photometer for Spitzer (MIPS) observations ofM81 at 24, 70, and 160 micron. The grand design nature of M81 is clearly seen,showing two well resolved spiral arms containing numerous bright star formingregions. The MIPS images reveal a significant amount of cold dust associatedwith the spiral arms. We investigate the variation of the ultraviolet (UV),H-alpha, and infrared (IR) luminosities and star formation rate (SFR)indicators across the face of M81 using the MIPS images and archival UV andH-alpha images. For regions in M81, we find that UV and H-alpha SFRs(uncorrected for dust attenuation) are always lower than the IR SFR. The causeof this behavior is dust attenuation and/or using SFR calibrations appropriatefor entire galaxies, not regions in galaxies. The characteristics of the dustattenuation for the regions indicate the dust grains and/or geometry aredifferent from those in starburst galaxies. The behavior of the infrared-radiocorrelation in M81 is seen to vary from the global average, with variationscorrelated with the morphology of M81.

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