SDSS-IV MaNGA: Spatial Evolution of Star Formation Triggered by Galaxy Interactions

Hsi An Pan, Lihwai Lin, Bau Ching Hsieh, Jorge K. Barrera-Ballesteros, Sebastián F. Sánchez, Chin Hao Hsu, Ryan Keenan, Patricia B. Tissera, Médéric Boquien, Y. Sophia Dai, Johan H. Knapen, Rogério Riffel, Maria Argudo-Fernández, Ting Xiao, Fang Ting Yuan

Resultado de la investigación: Article

Resumen

Galaxy interaction is considered a key driver of galaxy evolution and star formation (SF) history. In this paper, we present an empirical picture of the radial extent of interaction-triggered SF along the merger sequence. The samples under study are drawn from the integral field spectroscopy survey SDSS-IV MaNGA, including 205 star-forming galaxies in pairs/mergers and ∼1350 control galaxies. For each galaxy in pairs, the merger stage is identified according to its morphological signatures: incoming phase, at first pericenter passage, at apocenter, in merging phase, and in final coalescence. The effect of interactions is quantified by the global and spatially resolved SF rate (SFR) relative to the SFR of a control sample selected for each individual galaxy (Δlog SFR and Δlog sSFR(r), respectively). Analysis of the radial Δlog sSFR(r) distributions shows that galaxy interactions have no significant impact on Δlog sSFR(r) during the incoming phase. Right after the first pericenter passage, the radial Δlog sSFR(r) profile decreases steeply from enhanced to suppressed activity for increasing galactocentric radius. Later on, SF is enhanced on a broad spatial scale out to the maximum radius we explore (∼6.7 kpc) and the enhancement is in general centrally peaked. The extended SF enhancement is also observed for systems at their apocenters and in the coalescence phase, suggesting that interaction-triggered SF is not restricted to the central region of a galaxy. Further explorations of a wide range in parameter space of merger configurations (e.g., mass ratio) are required to constrain the whole picture of interaction-triggered SF.

Idioma originalEnglish
Número de artículo119
PublicaciónAstrophysical Journal
Volumen881
N.º2
DOI
EstadoPublished - 20 ago 2019

Huella dactilar

interacting galaxies
merger
star formation
galaxies
coalescence
coalescing
interactions
radii
augmentation
spectroscopy
star formation rate
mass ratios
history
signatures
histories
rate
stars
profiles
configurations

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Pan, H. A., Lin, L., Hsieh, B. C., Barrera-Ballesteros, J. K., Sánchez, S. F., Hsu, C. H., ... Yuan, F. T. (2019). SDSS-IV MaNGA: Spatial Evolution of Star Formation Triggered by Galaxy Interactions. Astrophysical Journal, 881(2), [119]. https://doi.org/10.3847/1538-4357/ab311c
Pan, Hsi An ; Lin, Lihwai ; Hsieh, Bau Ching ; Barrera-Ballesteros, Jorge K. ; Sánchez, Sebastián F. ; Hsu, Chin Hao ; Keenan, Ryan ; Tissera, Patricia B. ; Boquien, Médéric ; Dai, Y. Sophia ; Knapen, Johan H. ; Riffel, Rogério ; Argudo-Fernández, Maria ; Xiao, Ting ; Yuan, Fang Ting. / SDSS-IV MaNGA : Spatial Evolution of Star Formation Triggered by Galaxy Interactions. En: Astrophysical Journal. 2019 ; Vol. 881, N.º 2.
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abstract = "Galaxy interaction is considered a key driver of galaxy evolution and star formation (SF) history. In this paper, we present an empirical picture of the radial extent of interaction-triggered SF along the merger sequence. The samples under study are drawn from the integral field spectroscopy survey SDSS-IV MaNGA, including 205 star-forming galaxies in pairs/mergers and ∼1350 control galaxies. For each galaxy in pairs, the merger stage is identified according to its morphological signatures: incoming phase, at first pericenter passage, at apocenter, in merging phase, and in final coalescence. The effect of interactions is quantified by the global and spatially resolved SF rate (SFR) relative to the SFR of a control sample selected for each individual galaxy (Δlog SFR and Δlog sSFR(r), respectively). Analysis of the radial Δlog sSFR(r) distributions shows that galaxy interactions have no significant impact on Δlog sSFR(r) during the incoming phase. Right after the first pericenter passage, the radial Δlog sSFR(r) profile decreases steeply from enhanced to suppressed activity for increasing galactocentric radius. Later on, SF is enhanced on a broad spatial scale out to the maximum radius we explore (∼6.7 kpc) and the enhancement is in general centrally peaked. The extended SF enhancement is also observed for systems at their apocenters and in the coalescence phase, suggesting that interaction-triggered SF is not restricted to the central region of a galaxy. Further explorations of a wide range in parameter space of merger configurations (e.g., mass ratio) are required to constrain the whole picture of interaction-triggered SF.",
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Pan, HA, Lin, L, Hsieh, BC, Barrera-Ballesteros, JK, Sánchez, SF, Hsu, CH, Keenan, R, Tissera, PB, Boquien, M, Dai, YS, Knapen, JH, Riffel, R, Argudo-Fernández, M, Xiao, T & Yuan, FT 2019, 'SDSS-IV MaNGA: Spatial Evolution of Star Formation Triggered by Galaxy Interactions', Astrophysical Journal, vol. 881, n.º 2, 119. https://doi.org/10.3847/1538-4357/ab311c

SDSS-IV MaNGA : Spatial Evolution of Star Formation Triggered by Galaxy Interactions. / Pan, Hsi An; Lin, Lihwai; Hsieh, Bau Ching; Barrera-Ballesteros, Jorge K.; Sánchez, Sebastián F.; Hsu, Chin Hao; Keenan, Ryan; Tissera, Patricia B.; Boquien, Médéric; Dai, Y. Sophia; Knapen, Johan H.; Riffel, Rogério; Argudo-Fernández, Maria; Xiao, Ting; Yuan, Fang Ting.

En: Astrophysical Journal, Vol. 881, N.º 2, 119, 20.08.2019.

Resultado de la investigación: Article

TY - JOUR

T1 - SDSS-IV MaNGA

T2 - Spatial Evolution of Star Formation Triggered by Galaxy Interactions

AU - Pan, Hsi An

AU - Lin, Lihwai

AU - Hsieh, Bau Ching

AU - Barrera-Ballesteros, Jorge K.

AU - Sánchez, Sebastián F.

AU - Hsu, Chin Hao

AU - Keenan, Ryan

AU - Tissera, Patricia B.

AU - Boquien, Médéric

AU - Dai, Y. Sophia

AU - Knapen, Johan H.

AU - Riffel, Rogério

AU - Argudo-Fernández, Maria

AU - Xiao, Ting

AU - Yuan, Fang Ting

PY - 2019/8/20

Y1 - 2019/8/20

N2 - Galaxy interaction is considered a key driver of galaxy evolution and star formation (SF) history. In this paper, we present an empirical picture of the radial extent of interaction-triggered SF along the merger sequence. The samples under study are drawn from the integral field spectroscopy survey SDSS-IV MaNGA, including 205 star-forming galaxies in pairs/mergers and ∼1350 control galaxies. For each galaxy in pairs, the merger stage is identified according to its morphological signatures: incoming phase, at first pericenter passage, at apocenter, in merging phase, and in final coalescence. The effect of interactions is quantified by the global and spatially resolved SF rate (SFR) relative to the SFR of a control sample selected for each individual galaxy (Δlog SFR and Δlog sSFR(r), respectively). Analysis of the radial Δlog sSFR(r) distributions shows that galaxy interactions have no significant impact on Δlog sSFR(r) during the incoming phase. Right after the first pericenter passage, the radial Δlog sSFR(r) profile decreases steeply from enhanced to suppressed activity for increasing galactocentric radius. Later on, SF is enhanced on a broad spatial scale out to the maximum radius we explore (∼6.7 kpc) and the enhancement is in general centrally peaked. The extended SF enhancement is also observed for systems at their apocenters and in the coalescence phase, suggesting that interaction-triggered SF is not restricted to the central region of a galaxy. Further explorations of a wide range in parameter space of merger configurations (e.g., mass ratio) are required to constrain the whole picture of interaction-triggered SF.

AB - Galaxy interaction is considered a key driver of galaxy evolution and star formation (SF) history. In this paper, we present an empirical picture of the radial extent of interaction-triggered SF along the merger sequence. The samples under study are drawn from the integral field spectroscopy survey SDSS-IV MaNGA, including 205 star-forming galaxies in pairs/mergers and ∼1350 control galaxies. For each galaxy in pairs, the merger stage is identified according to its morphological signatures: incoming phase, at first pericenter passage, at apocenter, in merging phase, and in final coalescence. The effect of interactions is quantified by the global and spatially resolved SF rate (SFR) relative to the SFR of a control sample selected for each individual galaxy (Δlog SFR and Δlog sSFR(r), respectively). Analysis of the radial Δlog sSFR(r) distributions shows that galaxy interactions have no significant impact on Δlog sSFR(r) during the incoming phase. Right after the first pericenter passage, the radial Δlog sSFR(r) profile decreases steeply from enhanced to suppressed activity for increasing galactocentric radius. Later on, SF is enhanced on a broad spatial scale out to the maximum radius we explore (∼6.7 kpc) and the enhancement is in general centrally peaked. The extended SF enhancement is also observed for systems at their apocenters and in the coalescence phase, suggesting that interaction-triggered SF is not restricted to the central region of a galaxy. Further explorations of a wide range in parameter space of merger configurations (e.g., mass ratio) are required to constrain the whole picture of interaction-triggered SF.

KW - galaxies: evolution

KW - galaxies: interactions

KW - galaxies: star formation

KW - galaxies: starburst

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Pan HA, Lin L, Hsieh BC, Barrera-Ballesteros JK, Sánchez SF, Hsu CH y otros. SDSS-IV MaNGA: Spatial Evolution of Star Formation Triggered by Galaxy Interactions. Astrophysical Journal. 2019 ago 20;881(2). 119. https://doi.org/10.3847/1538-4357/ab311c