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Internal kinematics and stellar populations of the poststarburst galaxy SDSS J230743.41+152558.4

(2009) ASTROPHYSICAL JOURNAL LETTERS. 697(2). p.L111-L115
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Abstract
We present the first 3D-spectroscopic observations of a nearby Hi detected poststarburst, or E+A, galaxy, SDSS J230743.41+152558.4, obtained with the VIMOS IFU spectrograph at ESO VLT. Using the NBURSTS full spectral fitting technique, we derive maps of stellar kinematics, age, and metallicity out to 2-3 half-light radii. Our analysis reveals a large-scale rapidly rotating disk (nu(circ) = 300 km s(-1)) with a positive age gradient (0.6-1.5 Gyr), and a very metal-rich central region ([Fe/H] = +0.25 dex). If a merger or interaction is responsible for triggering the starburst, the presence of this undisturbed disk suggests a minor merger with a gas-rich satellite as the most plausible option, rather than a disruptive major merger. We find spectroscopic evidence for the presence of an active galactic nucleus. This is an important clue to the feedback mechanism that truncated the starburst. The presently observed quiescent phase may well be a temporary episode in the galaxy's life. SDSS J230743.41+152558.4 is gas-rich and may restart forming stars, again becoming blue before finally settling at the red sequence.
Keywords
TULLY-FISHER RELATION, E+A GALAXIES, COLOR-MAGNITUDE DISTRIBUTION, DIGITAL SKY SURVEY, DWARF ELLIPTIC GALAXIES, galaxies: individual (SDSS J230743.41+152558.4), galaxies: elliptical and lenticular, cD, STAR-FORMATION, LINE SPECTRA, EVOLUTION, MERGERS, CLASSIFICATION

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Citation

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MLA
Chilingarian, IV, Sven De Rijcke, and Pieter Buyle. “Internal Kinematics and Stellar Populations of the Poststarburst Galaxy SDSS J230743.41+152558.4.” ASTROPHYSICAL JOURNAL LETTERS 697.2 (2009): L111–L115. Print.
APA
Chilingarian, I., De Rijcke, S., & Buyle, P. (2009). Internal kinematics and stellar populations of the poststarburst galaxy SDSS J230743.41+152558.4. ASTROPHYSICAL JOURNAL LETTERS, 697(2), L111–L115.
Chicago author-date
Chilingarian, IV, Sven De Rijcke, and Pieter Buyle. 2009. “Internal Kinematics and Stellar Populations of the Poststarburst Galaxy SDSS J230743.41+152558.4.” Astrophysical Journal Letters 697 (2): L111–L115.
Chicago author-date (all authors)
Chilingarian, IV, Sven De Rijcke, and Pieter Buyle. 2009. “Internal Kinematics and Stellar Populations of the Poststarburst Galaxy SDSS J230743.41+152558.4.” Astrophysical Journal Letters 697 (2): L111–L115.
Vancouver
1.
Chilingarian I, De Rijcke S, Buyle P. Internal kinematics and stellar populations of the poststarburst galaxy SDSS J230743.41+152558.4. ASTROPHYSICAL JOURNAL LETTERS. 2009;697(2):L111–L115.
IEEE
[1]
I. Chilingarian, S. De Rijcke, and P. Buyle, “Internal kinematics and stellar populations of the poststarburst galaxy SDSS J230743.41+152558.4,” ASTROPHYSICAL JOURNAL LETTERS, vol. 697, no. 2, pp. L111–L115, 2009.
@article{695226,
  abstract     = {We present the first 3D-spectroscopic observations of a nearby Hi detected poststarburst, or E+A, galaxy, SDSS J230743.41+152558.4, obtained with the VIMOS IFU spectrograph at ESO VLT. Using the NBURSTS full spectral fitting technique, we derive maps of stellar kinematics, age, and metallicity out to 2-3 half-light radii. Our analysis reveals a large-scale rapidly rotating disk (nu(circ) = 300 km s(-1)) with a positive age gradient (0.6-1.5 Gyr), and a very metal-rich central region ([Fe/H] = +0.25 dex). If a merger or interaction is responsible for triggering the starburst, the presence of this undisturbed disk suggests a minor merger with a gas-rich satellite as the most plausible option, rather than a disruptive major merger. We find spectroscopic evidence for the presence of an active galactic nucleus. This is an important clue to the feedback mechanism that truncated the starburst. The presently observed quiescent phase may well be a temporary episode in the galaxy's life. SDSS J230743.41+152558.4 is gas-rich and may restart forming stars, again becoming blue before finally settling at the red sequence.},
  author       = {Chilingarian, IV and De Rijcke, Sven and Buyle, Pieter},
  issn         = {2041-8205},
  journal      = {ASTROPHYSICAL JOURNAL LETTERS},
  keywords     = {TULLY-FISHER RELATION,E+A GALAXIES,COLOR-MAGNITUDE DISTRIBUTION,DIGITAL SKY SURVEY,DWARF ELLIPTIC GALAXIES,galaxies: individual (SDSS J230743.41+152558.4),galaxies: elliptical and lenticular,cD,STAR-FORMATION,LINE SPECTRA,EVOLUTION,MERGERS,CLASSIFICATION},
  language     = {eng},
  number       = {2},
  pages        = {L111--L115},
  title        = {Internal kinematics and stellar populations of the poststarburst galaxy SDSS J230743.41+152558.4},
  url          = {http://dx.doi.org/10.1088/0004-637X/697/2/L111},
  volume       = {697},
  year         = {2009},
}

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