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Kinematics and stellar population of NGC 4486A

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Abstract
Context. NGC 4486A is a low-luminosity elliptical galaxy harbouring an edge-on nuclear disk of stars and dust. It is known to host a super-massive black hole. Aims. We study its large-scale kinematics and stellar population along the major axis to investigate the link between the nuclear and global properties. Methods. We use long-slit medium-resolution optical spectra that we fit against stellar population models. Results. The SSP-equivalent age is about 12 Gyr old throughout the body of the galaxy, and its metallicity decreases from [Fe/H] = 0.18 near the centre to sub-solar values in the outskirts. The metallicity gradient is -0.24 dex per decade of radius within the effective isophote. The velocity dispersion is 132 +/- 3 km s(-1) at 1.3 '' from the centre and decreases outwards. The rotation velocity reaches a maximum V-max greater than or similar to 115 +/- 5 km s(-1) at a radius 1.3 < r(max) < 2 ''. Conclusions. NGC 4486A appears to be a typical low-luminosity elliptical galaxy. There is no signature in the stellar population of the possible ancient accretion/merging event that produced the disk.
Keywords
galaxies: stellar content, galaxies: kinematics and dynamics, SUPERMASSIVE BLACK-HOLE, GALAXIES, RESOLUTION, cD, galaxies: individual: NGC 4486A, galaxies: elliptical and lenticular

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Citation

Please use this url to cite or link to this publication:

MLA
Prugniel, Philippe, Werner W Zeilinger, Mina Koleva, et al. “Kinematics and Stellar Population of NGC 4486A.” ASTRONOMY & ASTROPHYSICS 528 (2011): n. pag. Print.
APA
Prugniel, P., Zeilinger, W. W., Koleva, M., & De Rijcke, S. (2011). Kinematics and stellar population of NGC 4486A. ASTRONOMY & ASTROPHYSICS, 528.
Chicago author-date
Prugniel, Philippe, Werner W Zeilinger, Mina Koleva, and Sven De Rijcke. 2011. “Kinematics and Stellar Population of NGC 4486A.” Astronomy & Astrophysics 528.
Chicago author-date (all authors)
Prugniel, Philippe, Werner W Zeilinger, Mina Koleva, and Sven De Rijcke. 2011. “Kinematics and Stellar Population of NGC 4486A.” Astronomy & Astrophysics 528.
Vancouver
1.
Prugniel P, Zeilinger WW, Koleva M, De Rijcke S. Kinematics and stellar population of NGC 4486A. ASTRONOMY & ASTROPHYSICS. 2011;528.
IEEE
[1]
P. Prugniel, W. W. Zeilinger, M. Koleva, and S. De Rijcke, “Kinematics and stellar population of NGC 4486A,” ASTRONOMY & ASTROPHYSICS, vol. 528, 2011.
@article{1843125,
  abstract     = {Context. NGC 4486A is a low-luminosity elliptical galaxy harbouring an edge-on nuclear disk of stars and dust. It is known to host a super-massive black hole.
Aims. We study its large-scale kinematics and stellar population along the major axis to investigate the link between the nuclear and global properties.
Methods. We use long-slit medium-resolution optical spectra that we fit against stellar population models.
Results. The SSP-equivalent age is about 12 Gyr old throughout the body of the galaxy, and its metallicity decreases from [Fe/H] = 0.18 near the centre to sub-solar values in the outskirts. The metallicity gradient is -0.24 dex per decade of radius within the effective isophote. The velocity dispersion is 132 +/- 3 km s(-1) at 1.3 '' from the centre and decreases outwards. The rotation velocity reaches a maximum V-max greater than or similar to 115 +/- 5 km s(-1) at a radius 1.3 < r(max) < 2 ''.
Conclusions. NGC 4486A appears to be a typical low-luminosity elliptical galaxy. There is no signature in the stellar population of the possible ancient accretion/merging event that produced the disk.},
  articleno    = {A128},
  author       = {Prugniel, Philippe and Zeilinger, Werner W and Koleva, Mina and De Rijcke, Sven},
  issn         = {0004-6361},
  journal      = {ASTRONOMY & ASTROPHYSICS},
  keywords     = {galaxies: stellar content,galaxies: kinematics and dynamics,SUPERMASSIVE BLACK-HOLE,GALAXIES,RESOLUTION,cD,galaxies: individual: NGC 4486A,galaxies: elliptical and lenticular},
  language     = {eng},
  pages        = {6},
  title        = {Kinematics and stellar population of NGC 4486A},
  url          = {http://dx.doi.org/10.1051/0004-6361/201016353},
  volume       = {528},
  year         = {2011},
}

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