Unveiling the Boxy Bulge and Bar of the Andromeda Spiral Galaxy

@article{Beaton2005UnveilingTB,
  title={Unveiling the Boxy Bulge and Bar of the Andromeda Spiral Galaxy},
  author={R. Beaton and S. Majewski and P. Guhathakurta and M. Skrutskie and R. Cutri and J. Good and R. Patterson and E. Athanassoula and M. Bureau},
  journal={The Astrophysical Journal},
  year={2005},
  volume={658}
}
A new, 2.8 deg^2 J, H, Ks near-infrared (NIR) survey from the 2MASS 6X program across the extent of the optical disk of the Andromeda (M31) galaxy provides a clear view of the M31 center almost completely unfettered by dust extinction and reveals a high-contrast bulge with very boxy isophotes dominating the NIR light to a semimajor axis of ~700" (2.6 kpc). The inner bulge (≾50") isophotes are relatively circular but show some twisting. Beyond this, (1) the M31 bulge ellipticity increases, (2… Expand

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