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

Research output: Contribution to journalArticle

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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 (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).

Original languageEnglish
Pages (from-to)L79-L82
JournalAstrophysical Journal
Volume619
Issue number1 II
DOIs
Publication statusPublished - 2005 Jan 20

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star formation
H II regions
radii
set theory
gas
galaxies
gases

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Thilker, D. A., Bianchi, L., Boissier, S., Gil De Paz, A., Madore, B. F., Martin, D. C., ... 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
Thilker, David A. ; Bianchi, Luciana ; Boissier, Samuel ; Gil De Paz, Armando ; Madore, Barry F. ; Martin, D. Christopher ; Meurer, Gerhardt R. ; Neff, Susan G. ; Rich, R. Michael ; Schiminovich, David ; Seibert, Mark ; Wyder, Ted K. ; Barlow, Tom A. ; Byun, Yong Ik ; Donas, Jose ; Forster, Karl ; Friedman, Peter G. ; Heckman, Timothy M. ; Jelinsky, Patrick N. ; Lee, Young Wook ; Malina, Roger F. ; Milliard, Bruno ; Morrissey, Patrick ; Siegmund, Oswald H.W. ; Small, Todd ; Szalay, Alex S. ; Welsh, Barry Y. / Recent star formation in the extreme outer disk of M83. In: Astrophysical Journal. 2005 ; Vol. 619, No. 1 II. pp. L79-L82.
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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 (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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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

Recent star formation in the extreme outer disk of M83. / Thilker, David A.; Bianchi, Luciana; Boissier, Samuel; Gil De Paz, Armando; Madore, Barry F.; Martin, D. Christopher; Meurer, Gerhardt R.; Neff, Susan G.; Rich, R. Michael; Schiminovich, David; Seibert, Mark; Wyder, Ted K.; Barlow, Tom A.; Byun, Yong Ik; Donas, Jose; Forster, Karl; Friedman, Peter G.; Heckman, Timothy M.; Jelinsky, Patrick N.; Lee, Young Wook; Malina, Roger F.; Milliard, Bruno; Morrissey, Patrick; Siegmund, Oswald H.W.; Small, Todd; Szalay, Alex S.; Welsh, Barry Y.

In: Astrophysical Journal, Vol. 619, No. 1 II, 20.01.2005, p. L79-L82.

Research output: Contribution to journalArticle

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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

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Thilker DA, Bianchi L, Boissier S, Gil De Paz A, Madore BF, Martin DC et al. Recent star formation in the extreme outer disk of M83. Astrophysical Journal. 2005 Jan 20;619(1 II):L79-L82. https://doi.org/10.1086/425251