Recent star formation in the extreme outer disk of M83

David A. Thilker; Luciana Bianchi; Samuel Boissier; Armando Gil De Paz; Barry F. Madore; D. Christopher Martin; Gerhardt R. Meurer; Susan G. Neff; R. Michael Rich; David Schiminovich; Mark Seibert; Ted K. Wyder; Tom A. Barlow; Yong Ik Byun; Jose Donas; Karl Forster; Peter G. Friedman; Timothy M. Heckman; Patrick N. Jelinsky; Young Wook Lee; Roger F. Malina; Bruno Milliard; Patrick Morrissey; Oswald H.W. Siegmund; Todd Small; Alex S. Szalay; Barry Y. Welsh

doi:10.1086/425251

Recent star formation in the extreme outer disk of M83

David A. Thilker, Luciana Bianchi, Samuel Boissier, Armando Gil De Paz, Barry F. Madore, D. Christopher Martin, Gerhardt R. Meurer, Susan G. Neff, R. Michael Rich, David Schiminovich, Mark Seibert, Ted K. Wyder, Tom A. Barlow, Yong Ik Byun, Jose Donas, Karl Forster, Peter G. Friedman, Timothy M. Heckman, Patrick N. Jelinsky, Young Wook LeeRoger F. Malina, Bruno Milliard, Patrick Morrissey, Oswald H.W. Siegmund, Todd Small, Alex S. Szalay, Barry Y. Welsh

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Abstract

Ultraviolet imaging with the Galaxy Evolution Explorer (GALEX) has revealed an extensive sample of UV-bright stellar complexes in the extreme outer disk of M83, extending to about 4 times the radius at which the majority of H II regions are detected (R_{H II} = 5′.1, or 6.6 kpc). These sources are typically associated with large-scale filamentary H I structures in the warped outer disk of M83 and are distributed beyond the galactocentric radii at which molecular interstellar medium has yet been detected. We present measured properties of these stellar complexes, including far-UV and near-UV magnitudes and local gas surface density. Only a subset of the outer-disk UV sources have corresponding H II regions detected in Ha imaging, consistent with a sample of mixed age in which some sources are a few megayears old and others are much more evolved (∼10⁸ yr).

Original language	English
Pages (from-to)	L79-L82
Journal	Astrophysical Journal
Volume	619
Issue number	1 II
DOIs	https://doi.org/10.1086/425251
Publication status	Published - 2005 Jan 20

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/425251

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Thilker, D. A., Bianchi, L., Boissier, S., Gil De Paz, A., Madore, B. F., Martin, D. C., Meurer, G. R., Neff, S. G., Rich, R. M., Schiminovich, D., Seibert, M., Wyder, T. K., Barlow, T. A., Byun, Y. I., Donas, J., Forster, K., Friedman, P. G., Heckman, T. M., Jelinsky, P. N., ... Welsh, B. Y. (2005). Recent star formation in the extreme outer disk of M83. Astrophysical Journal, 619(1 II), L79-L82. https://doi.org/10.1086/425251

@article{7f58069ec49d4e988b3e355e4d5954bb,

title = "Recent star formation in the extreme outer disk of M83",

abstract = "Ultraviolet imaging with the Galaxy Evolution Explorer (GALEX) has revealed an extensive sample of UV-bright stellar complexes in the extreme outer disk of M83, extending to about 4 times the radius at which the majority of H II regions are detected (RH II = 5′.1, or 6.6 kpc). These sources are typically associated with large-scale filamentary H I structures in the warped outer disk of M83 and are distributed beyond the galactocentric radii at which molecular interstellar medium has yet been detected. We present measured properties of these stellar complexes, including far-UV and near-UV magnitudes and local gas surface density. Only a subset of the outer-disk UV sources have corresponding H II regions detected in Ha imaging, consistent with a sample of mixed age in which some sources are a few megayears old and others are much more evolved (∼108 yr).",

author = "Thilker, {David A.} and Luciana Bianchi and Samuel Boissier and {Gil De Paz}, Armando and Madore, {Barry F.} and Martin, {D. Christopher} and Meurer, {Gerhardt R.} and Neff, {Susan G.} and Rich, {R. Michael} and David Schiminovich and Mark Seibert and Wyder, {Ted K.} and Barlow, {Tom A.} and Byun, {Yong Ik} and Jose Donas and Karl Forster and Friedman, {Peter G.} and Heckman, {Timothy M.} and Jelinsky, {Patrick N.} and Lee, {Young Wook} and Malina, {Roger F.} and Bruno Milliard and Patrick Morrissey and Siegmund, {Oswald H.W.} and Todd Small and Szalay, {Alex S.} and Welsh, {Barry Y.}",

year = "2005",

month = jan,

day = "20",

doi = "10.1086/425251",

language = "English",

volume = "619",

pages = "L79--L82",

journal = "Astrophysical Journal",

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number = "1 II",

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Thilker, DA, Bianchi, L, Boissier, S, Gil De Paz, A, Madore, BF, Martin, DC, Meurer, GR, Neff, SG, Rich, RM, Schiminovich, D, Seibert, M, Wyder, TK, Barlow, TA, Byun, YI, Donas, J, Forster, K, Friedman, PG, Heckman, TM, Jelinsky, PN, Lee, YW, Malina, RF, Milliard, B, Morrissey, P, Siegmund, OHW, Small, T, Szalay, AS & Welsh, BY 2005, 'Recent star formation in the extreme outer disk of M83', Astrophysical Journal, vol. 619, no. 1 II, pp. L79-L82. https://doi.org/10.1086/425251

TY - JOUR

T1 - Recent star formation in the extreme outer disk of M83

AU - Thilker, David A.

AU - Bianchi, Luciana

AU - Boissier, Samuel

AU - Gil De Paz, Armando

AU - Madore, Barry F.

AU - Martin, D. Christopher

AU - Meurer, Gerhardt R.

AU - Neff, Susan G.

AU - Rich, R. Michael

AU - Schiminovich, David

AU - Seibert, Mark

AU - Wyder, Ted K.

AU - Barlow, Tom A.

AU - Byun, Yong Ik

AU - Donas, Jose

AU - Forster, Karl

AU - Friedman, Peter G.

AU - Heckman, Timothy M.

AU - Jelinsky, Patrick N.

AU - Lee, Young Wook

AU - Malina, Roger F.

AU - Milliard, Bruno

AU - Morrissey, Patrick

AU - Siegmund, Oswald H.W.

AU - Small, Todd

AU - Szalay, Alex S.

AU - Welsh, Barry Y.

PY - 2005/1/20

Y1 - 2005/1/20

N2 - Ultraviolet imaging with the Galaxy Evolution Explorer (GALEX) has revealed an extensive sample of UV-bright stellar complexes in the extreme outer disk of M83, extending to about 4 times the radius at which the majority of H II regions are detected (RH II = 5′.1, or 6.6 kpc). These sources are typically associated with large-scale filamentary H I structures in the warped outer disk of M83 and are distributed beyond the galactocentric radii at which molecular interstellar medium has yet been detected. We present measured properties of these stellar complexes, including far-UV and near-UV magnitudes and local gas surface density. Only a subset of the outer-disk UV sources have corresponding H II regions detected in Ha imaging, consistent with a sample of mixed age in which some sources are a few megayears old and others are much more evolved (∼108 yr).

AB - Ultraviolet imaging with the Galaxy Evolution Explorer (GALEX) has revealed an extensive sample of UV-bright stellar complexes in the extreme outer disk of M83, extending to about 4 times the radius at which the majority of H II regions are detected (RH II = 5′.1, or 6.6 kpc). These sources are typically associated with large-scale filamentary H I structures in the warped outer disk of M83 and are distributed beyond the galactocentric radii at which molecular interstellar medium has yet been detected. We present measured properties of these stellar complexes, including far-UV and near-UV magnitudes and local gas surface density. Only a subset of the outer-disk UV sources have corresponding H II regions detected in Ha imaging, consistent with a sample of mixed age in which some sources are a few megayears old and others are much more evolved (∼108 yr).

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U2 - 10.1086/425251

DO - 10.1086/425251

M3 - Article

AN - SCOPUS:20044369345

SN - 0004-637X

VL - 619

SP - L79-L82

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

ER -

Recent star formation in the extreme outer disk of M83

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