HALOGAS observations of NGC 4414 : fountains, interaction, and ram pressure
- Author
- WJG de Blok, GIG Józsa, M Patterson, Gianfranco Gentile (UGent) , M Patterson, GH Heald, E Jütte, P Kamphuis, RJ Rand, P Serra and RAM Walterbos
- Organization
- Abstract
- We present deep H I imaging of the nearby spiral galaxy NGC 4414, taken as part of the Westerbork HALOGAS (Hydrogen Accretion in LOcal GAlaxieS) survey. The observations show that NGC 4414 can be characterized by a regularly rotating inner H I disk, and a more disturbed outer disk. Modeling of the kinematics shows that the outer disk is best described by a U-shaped warp. Deep optical imaging also reveals the presence of a low surface brightness stellar shell, indicating a minor interaction with a dwarf galaxy at some stage in the past. Modeling of the inner disk suggests that about 4 percent of the inner H I is in the form of extra-planar gas. Because of the disturbed nature of the outer disk, this number is difficult to constrain for the galaxy as a whole. These new, deep observations of NGC 4414 presented here show that even apparently undisturbed galaxies are interacting with their environment.
- Keywords
- galaxies: ISM, galaxies: halos, galaxies: kinematics and dynamics, galaxies: individual: NGC 4414, galaxies: structure, ISOLATED SPIRAL NGC-4414, SHELL GALAXIES, DISK GALAXIES, DARK-MATTER, H I, GAS, LOPSIDEDNESS, THINGS, MASS, POTENTIALS
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-6846898
- MLA
- de Blok, WJG, et al. “HALOGAS Observations of NGC 4414 : Fountains, Interaction, and Ram Pressure.” ASTRONOMY & ASTROPHYSICS, vol. 566, 2014, doi:10.1051/0004-6361/201322517.
- APA
- de Blok, W., Józsa, G., Patterson, M., Gentile, G., Patterson, M., Heald, G., … Walterbos, R. (2014). HALOGAS observations of NGC 4414 : fountains, interaction, and ram pressure. ASTRONOMY & ASTROPHYSICS, 566. https://doi.org/10.1051/0004-6361/201322517
- Chicago author-date
- Blok, WJG de, GIG Józsa, M Patterson, Gianfranco Gentile, M Patterson, GH Heald, E Jütte, et al. 2014. “HALOGAS Observations of NGC 4414 : Fountains, Interaction, and Ram Pressure.” ASTRONOMY & ASTROPHYSICS 566. https://doi.org/10.1051/0004-6361/201322517.
- Chicago author-date (all authors)
- de Blok, WJG, GIG Józsa, M Patterson, Gianfranco Gentile, M Patterson, GH Heald, E Jütte, P Kamphuis, RJ Rand, P Serra, and RAM Walterbos. 2014. “HALOGAS Observations of NGC 4414 : Fountains, Interaction, and Ram Pressure.” ASTRONOMY & ASTROPHYSICS 566. doi:10.1051/0004-6361/201322517.
- Vancouver
- 1.de Blok W, Józsa G, Patterson M, Gentile G, Patterson M, Heald G, et al. HALOGAS observations of NGC 4414 : fountains, interaction, and ram pressure. ASTRONOMY & ASTROPHYSICS. 2014;566.
- IEEE
- [1]W. de Blok et al., “HALOGAS observations of NGC 4414 : fountains, interaction, and ram pressure,” ASTRONOMY & ASTROPHYSICS, vol. 566, 2014.
@article{6846898, abstract = {{We present deep H I imaging of the nearby spiral galaxy NGC 4414, taken as part of the Westerbork HALOGAS (Hydrogen Accretion in LOcal GAlaxieS) survey. The observations show that NGC 4414 can be characterized by a regularly rotating inner H I disk, and a more disturbed outer disk. Modeling of the kinematics shows that the outer disk is best described by a U-shaped warp. Deep optical imaging also reveals the presence of a low surface brightness stellar shell, indicating a minor interaction with a dwarf galaxy at some stage in the past. Modeling of the inner disk suggests that about 4 percent of the inner H I is in the form of extra-planar gas. Because of the disturbed nature of the outer disk, this number is difficult to constrain for the galaxy as a whole. These new, deep observations of NGC 4414 presented here show that even apparently undisturbed galaxies are interacting with their environment.}}, articleno = {{A80}}, author = {{de Blok, WJG and Józsa, GIG and Patterson, M and Gentile, Gianfranco and Patterson, M and Heald, GH and Jütte, E and Kamphuis, P and Rand, RJ and Serra, P and Walterbos, RAM}}, issn = {{0004-6361}}, journal = {{ASTRONOMY & ASTROPHYSICS}}, keywords = {{galaxies: ISM,galaxies: halos,galaxies: kinematics and dynamics,galaxies: individual: NGC 4414,galaxies: structure,ISOLATED SPIRAL NGC-4414,SHELL GALAXIES,DISK GALAXIES,DARK-MATTER,H I,GAS,LOPSIDEDNESS,THINGS,MASS,POTENTIALS}}, language = {{eng}}, pages = {{16}}, title = {{HALOGAS observations of NGC 4414 : fountains, interaction, and ram pressure}}, url = {{http://doi.org/10.1051/0004-6361/201322517}}, volume = {{566}}, year = {{2014}}, }
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