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| DOI | 10.1093/MNRAS/STAC3069 | ||||
| Año | 2022 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Most secular effects produced by stellar bars strongly depend on the pattern speed. Unfortunately, it is also the most difficult observational parameter to estimate. In this work, we measured the bar pattern speed of 97 Milky-Way analogue galaxies from the MaNGA survey using the Tremaine-Weinberg method. The sample was selected by constraining the stellar mass and morphological type. We improve our measurements by weighting three independent estimates of the disc position angle. To recover the disc rotation curve, we fit a kinematic model to the H alpha velocity maps correcting for the non-circular motions produced by the bar. The complete sample has a smooth distribution of the bar pattern speed (Omega(Bar) = 28.14(-9.55)(+12.30) km s(-1) kpc(-1)), corotation radius (R-CR = 7.82(-2.96)(+3.99) kpc), and the rotation rate (R = 1.35(-0.40)(+0.60)). We found two sets of correlations: (i) between the bar pattern speed, the bar length and the logarithmic stellar mass (ii) between the bar pattern speed, the disc circular velocity and the bar rotation rate. If we constrain our sample by inclination within 30 degrees < i < 60 degrees and relative orientation 20 degrees < vertical bar PA(disc) - PA(bar)vertical bar < 70 degrees, the correlations become stronger and the fraction of ultra-fast bars is reduced from 20 to 10 per cent of the sample. This suggests that a significant fraction of ultra-fast bars in our sample could be associated with the geometric limitations of the TW method. By further constraining the bar size and disc circular velocity, we obtain a subsample of 25 Milky-Way analogues galaxies with distributions Omega(Bar) = 30.48(-6.57)(+10.94) km s(-1) kpc(-1), R-CR = 6.77(-1.91)(+2.32) kpc, and R = 1.45(-0.43)(+0.57) , in good agreement with the current estimations for our Galaxy.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Garma-Oehmichen, Luis | Hombre |
Univ Nacl Autonoma Mexico - México
Universidad Nacional Autónoma de México - México |
| 2 | HERNANDEZ-TOLEDO, HECTOR MANUEL | Hombre |
Univ Nacl Autonoma Mexico - México
Universidad Nacional Autónoma de México - México |
| 3 | Aquino-Ortiz, E. | Hombre |
Pontificia Universidad Católica de Chile - Chile
|
| 4 | Martinez-Medina, L. | - |
Univ Nacl Autonoma Mexico - México
Universidad Nacional Autónoma de México - México |
| 5 | Puerari, I | - |
Inst Nacl Astrofis Opt & Electr - México
Instituto Nacional de Astrofisica Optica y Electronica - México |
| 6 | Cano-Diaz, Mariana | Mujer |
Univ Nacl Autonoma Mexico - México
Universidad Nacional Autónoma de México - México |
| 7 | Valenzuela, Octavio | Hombre |
Univ Nacl Autonoma Mexico - México
Universidad Nacional Autónoma de México - México |
| 8 | Vazquez-Mata, J. A. | Hombre |
Univ Nacl Autonoma Mexico - México
Universidad Nacional Autónoma de México - México |
| 9 | Geron, Tobias | Hombre |
UNIV OXFORD - Reino Unido
University of Oxford - Reino Unido |
| 10 | Martinez-Medina, L. | - |
Univ Nacl Autonoma Mexico - México
Universidad Nacional Autónoma de México - México |
| 11 | LANE, RICHARD READE | Hombre |
Universidad Bernardo O'Higgins - Chile
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| Fuente |
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| Consejo Nacional de Ciencia y Tecnología |
| PAPIIT |
| SECTEI (Secretaria de Educacion, Ciencia, Tecnologia e Innovacion de la Ciudad de Mexico) |
| PAPIIT (Programa de Apoyo a Proyectos de Investigacion e Innovacion Tecnologica) |
| CONACyT (Consejo Nacional de Ciencia y Tecnologia) scholarship |
| Agradecimiento |
|---|
| We thank the referee Isabel Perez for the careful revision and useful comments that significantly improved the quality of the paper. LGO acknowledge support from CONACyT (Consejo Nacional de Ciencia y Tecnologia) scholarship. LGO and LMM acknowledge support from PAPIIT (Programa de Apoyo a Proyectos de Investigaci ' on e Innovacion Tecnologica) IA101520 and IA104022 grants. HMHT and OV akcnowledge support from PAPIIT grants: IG101620 and IG101222. EAO acknowledge support from the SECTEI (Secretar ' ia de Educacion, Ciencia, Tecnologia e Innovaci ' on de la Ciudad de M ' exico) under the Postdoctoral Fellowship SECTEI/170/2021 and CM-SECTEI/303/2021. |
| LGO acknowledge support from CONACyT (Consejo Nacional de Ciencia y Tecnologia) scholarship. LGO and LMM acknowledge support from PAPIIT (Programa de Apoyo a Proyectos de Investigacion e Innovacion Tecnologica) IA101520 and IA104022 grants. |