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Mass models from high-resolution H i data of the dwarf galaxy NGC 1560

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Abstract
We present H i observations performed at the Giant Metrewave Radio Telescope (GMRT) of the nearby dwarf galaxy NGC 1560. This Sd galaxy is well known for a distinct 'wiggle' in its rotation curve. Our new observations have twice the resolution of the previously published H i data. We derived the rotation curve by taking projection effects into account, and we verified the derived kinematics by creating model data cubes. This new rotation curve is similar to the previously published one: we confirm the presence of a clear wiggle. The main differences are in the innermost similar to 100 arcsec of the rotation curve, where we find slightly (less than or similar to 5 km s-1) higher velocities. Mass modelling of the rotation curve results in good fits using the core-dominated Burkert halo (which however does not reproduce the wiggle), bad fits using the a Navarro, Frenk & White halo, and good fits using Modified Newtonian Dynamics (MOND), which also reproduces the wiggle.
Keywords
MODIFIED NEWTONIAN DYNAMICS, DARK-MATTER HALOS, SURFACE BRIGHTNESS GALAXIES, UNIVERSAL ROTATION CURVE, TULLY-FISHER RELATION, NEUTRAL HYDROGEN OBSERVATIONS, SPIRAL GALAXIES, VELOCITY DISPERSION, BARYONIC INFALL, STELLAR MASS, gravitation, galaxies: individual: NGC 1560, galaxies: kinematics and dynamics, galaxies: spiral, dark matter

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Chicago
Gentile, Gianfranco, Maarten Baes, B Famaey, and Karel Van Acoleyen. 2010. “Mass Models from High-resolution H i Data of the Dwarf Galaxy NGC 1560.” Monthly Notices of the Royal Astronomical Society 406 (4): 2493–2503.
APA
Gentile, G., Baes, M., Famaey, B., & Van Acoleyen, K. (2010). Mass models from high-resolution H i data of the dwarf galaxy NGC 1560. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 406(4), 2493–2503.
Vancouver
1.
Gentile G, Baes M, Famaey B, Van Acoleyen K. Mass models from high-resolution H i data of the dwarf galaxy NGC 1560. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 2010;406(4):2493–503.
MLA
Gentile, Gianfranco, Maarten Baes, B Famaey, et al. “Mass Models from High-resolution H i Data of the Dwarf Galaxy NGC 1560.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 406.4 (2010): 2493–2503. Print.
@article{1237435,
  abstract     = {We present H i observations performed at the Giant Metrewave Radio Telescope (GMRT) of the nearby dwarf galaxy NGC 1560. This Sd galaxy is well known for a distinct 'wiggle' in its rotation curve. Our new observations have twice the resolution of the previously published H i data. We derived the rotation curve by taking projection effects into account, and we verified the derived kinematics by creating model data cubes. This new rotation curve is similar to the previously published one: we confirm the presence of a clear wiggle. The main differences are in the innermost similar to 100 arcsec of the rotation curve, where we find slightly (less than or similar to 5 km s-1) higher velocities. Mass modelling of the rotation curve results in good fits using the core-dominated Burkert halo (which however does not reproduce the wiggle), bad fits using the a Navarro, Frenk \& White halo, and good fits using Modified Newtonian Dynamics (MOND), which also reproduces the wiggle.},
  author       = {Gentile, Gianfranco and Baes, Maarten and Famaey, B and Van Acoleyen, Karel},
  issn         = {0035-8711},
  journal      = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY},
  keyword      = {MODIFIED NEWTONIAN DYNAMICS,DARK-MATTER HALOS,SURFACE BRIGHTNESS GALAXIES,UNIVERSAL ROTATION CURVE,TULLY-FISHER RELATION,NEUTRAL HYDROGEN OBSERVATIONS,SPIRAL GALAXIES,VELOCITY DISPERSION,BARYONIC INFALL,STELLAR MASS,gravitation,galaxies: individual: NGC 1560,galaxies: kinematics and dynamics,galaxies: spiral,dark matter},
  language     = {eng},
  number       = {4},
  pages        = {2493--2503},
  title        = {Mass models from high-resolution H i data of the dwarf galaxy NGC 1560},
  url          = {http://dx.doi.org/10.1111/j.1365-2966.2010.16838.x},
  volume       = {406},
  year         = {2010},
}

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