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62 papers · 1 filter
Does the Sagittarius Stream constrain the Milky Way halo to be triaxial?
Rodrigo Ibata, Geraint F. Lewis, Nicolas F. Martin +2
Recent analyses of the stellar stream of the Sagittarius dwarf galaxy have claimed that the kinematics and three-dimensional location of the M-giant stars in this structure constra…
Approximate integrals of motion
Olivier Bienaymé, Gregor Traven
We determine approximate numerical integrals of motion of 2D symmetric Hamiltonian systems. We detail for a few gravitational potentials the conditions under which quasi-integrals…
A sensitive survey for 13CO, CN, H2CO and SO in the disks of T Tauri and Herbig Ae stars
S. Guilloteau, E. Di Folco, A. Dutrey +3
We use the IRAM 30-m telescope to perform a sensitive search for CN N=2-1 in 42 T Tauri or Herbig Ae systems located mostly in the Taurus-Auriga region. CO J=2-1 is observed…
Simultaneous multi-band detection of Low Surface Brightness galaxies with Markovian modelling
B. Vollmer, B. Perret, M. Petremand +7
We present an algorithm for the detection of Low Surface Brightness (LSB) galaxies in images, called MARSIAA (MARkovian Software for Image Analysis in Astronomy), which is based on…
PAndAS in the mist: The stellar and gaseous mass within the halos of M31 and M33
Geraint F. Lewis, Robert Braun, Alan W. McConnachie +12
Large scale surveys of the prominent members of the Local Group have provided compelling evidence for the hierarchical formation of massive galaxies, revealing a wealth of substruc…
A Pan-STARRS1 View of the Bifurcated Sagittarius Stream
C. T. Slater, E. F. Bell, E. F. Schlafly +12
We use data from the Pan-STARRS1 survey to present a panoramic view of the Sagittarius tidal stream in the southern Galactic hemisphere. As a result of the extensive sky coverage o…