TY - JOUR
T1 - E+A galaxies with blue cores
T2 - Active galaxies in transition
AU - Yang, Yujin
AU - Tremonti, Christy A.
AU - Zabludoff, Ann I.
AU - Zaritsky, Dennis
N1 - Funding Information:
We thank Felipe Menanteau and the other, anonymous, referee for their helpful suggestions. Y. Y. and A. I. Z. acknowledge funding from HST grant GO-09781.03-A and NSF grant AST 02-06084. C. T. acknowledges support from HST grant HF-0119201A.
PY - 2006/7/20
Y1 - 2006/7/20
N2 - Hubble Space Telescope (HST) ACS images reveal blue cores in four E+A, or post-starburst, galaxies. Follow-up spectroscopy shows that these cores have LINER spectra. The existence of LINERs, consistent with those in many elliptical galaxies, is yet one more piece of evidence that these postmerger, post-starburst, bulge-dominated galaxies will evolve into normal elliptical galaxies. More interestingly, if LINERs are powered by low-luminosity active galactic nuclei (AGNs), their presence in these E+A's suggests that any rapid growth phase of the central black hole ended in rough concert with the cessation of star formation. This result emphasizes the importance of E+A's for exploring how the evolution of black holes and AGNs may be tied to that of galactic bulges.
AB - Hubble Space Telescope (HST) ACS images reveal blue cores in four E+A, or post-starburst, galaxies. Follow-up spectroscopy shows that these cores have LINER spectra. The existence of LINERs, consistent with those in many elliptical galaxies, is yet one more piece of evidence that these postmerger, post-starburst, bulge-dominated galaxies will evolve into normal elliptical galaxies. More interestingly, if LINERs are powered by low-luminosity active galactic nuclei (AGNs), their presence in these E+A's suggests that any rapid growth phase of the central black hole ended in rough concert with the cessation of star formation. This result emphasizes the importance of E+A's for exploring how the evolution of black holes and AGNs may be tied to that of galactic bulges.
KW - Galaxies: active
KW - Galaxies: evolution
KW - Galaxies: starburst
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U2 - 10.1086/506909
DO - 10.1086/506909
M3 - Article
AN - SCOPUS:33747456343
SN - 0004-637X
VL - 646
SP - L33-L36
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - II
ER -