We identified the four most significant features in the UV velocity distribution of solar neighborhood stars: H1, H2 and W1, W2 in the Hercules and Wolf 630 streams, respectively. We set the task of determining a number of characteristics of the central Galactic bar independently by analyzing each of the identified features under the assumption that the Hercules and Wolf 630 streams have a bar-induced dynamical nature. We solve the problem by constructing 2 : 1 resonant orbits in the rotating bar frame for each star in these streams. Our analysis of the resonant orbits found has shown that the bar pattern speed Ωb lies within the range 45–52 km s−1 kpc−1 with a mean of 48.1±1.0 km s−1 kpc−1, while the bar angle θb is within the range 35° – ...
We derive the pattern speed of the Galactic bar from the analysis of the kinematics of the Hercules ...
We investigate the relations between the properties of bars and their host galaxies in a sample of 7...
Context. The velocity distribution of stars in the solar neighbourhood is inhomogeneous and rich wit...
Non-axisymmetries in the Galactic potential (spiral arms and bar) induce kinematic groups such as th...
Non-axisymmetries in the Galactic potential (spiral arms and bar) induce kinematic groups such as th...
International audienceThe length and pattern speed of the Milky Way bar are still controversial. Pho...
In this talk is to discuss the relation between the properties of the Galactic Bar and the position ...
The second data release of the Gaia mission has revealed, in stellar velocity and action space, mult...
The second data release of the Gaia mission has revealed, in stellar velocity and action space, mult...
Context. The bar pattern speed (Ωb) is defined as the rotational frequency of the bar, and it determ...
The Hercules stream is a group of comoving stars in the solar neighbourhood, which can potentially b...
Context. The bar pattern speed (Ωb) is defined as the rotational frequency of the bar, and...
We derive the pattern speed of the Galactic bar from the analysis of the kinematics of the Hercules ...
We investigate the relations between the properties of bars and their host galaxies in a sample of 7...
Context. The velocity distribution of stars in the solar neighbourhood is inhomogeneous and rich wit...
Non-axisymmetries in the Galactic potential (spiral arms and bar) induce kinematic groups such as th...
Non-axisymmetries in the Galactic potential (spiral arms and bar) induce kinematic groups such as th...
International audienceThe length and pattern speed of the Milky Way bar are still controversial. Pho...
In this talk is to discuss the relation between the properties of the Galactic Bar and the position ...
The second data release of the Gaia mission has revealed, in stellar velocity and action space, mult...
The second data release of the Gaia mission has revealed, in stellar velocity and action space, mult...
Context. The bar pattern speed (Ωb) is defined as the rotational frequency of the bar, and it determ...
The Hercules stream is a group of comoving stars in the solar neighbourhood, which can potentially b...
Context. The bar pattern speed (Ωb) is defined as the rotational frequency of the bar, and...
We derive the pattern speed of the Galactic bar from the analysis of the kinematics of the Hercules ...
We investigate the relations between the properties of bars and their host galaxies in a sample of 7...
Context. The velocity distribution of stars in the solar neighbourhood is inhomogeneous and rich wit...