We have modeled the peculiar bidimensional shape of the emission lines in a sample of four disk galaxies as due to the motion of a gaseous disk rotating in the combined potential of a central point-like mass and of a diffuse stellar disk. From the values we derive for the central masses and the luminosities of the corresponding bulges we obtain a median M•/LB , bulge ∼ 0.16 (in solar units). Th...

Abstract We present a direct comparison of the Pan-Andromeda Archaeological Survey (PAndAS) observations stellar halo M31 with halos six galaxies from Auriga simulations. process simulated through A uriga 2PA nd AS pipeline and create PAndAS-like mocks that fold in all observational limitations survey data (foreground contamination Milky Way stars, incompleteness catalogs, photometric uncertain...

Neutral hydrogen (H I ) has been detected in the Local Group dwarf spheroidal galaxy Sculptor with the 64 m Parkes single dish and mapped with the Australia Telescope synthesis array. Most of the detected H I is in two clouds ∼ 15 − 20 away from the optical center. The gas is observed at the same systemic velocity than the stars but at ≥ 125 km s away from the Magellanic Stream components in th...

It was suggested that some of the short-duration gamma-ray bursts (GRBs) are giant flares of soft gamma-ray repeaters (SGRs) in nearby galaxies. To test this hypothesis, I have constructed a sample of 47 short GRBs, detected by the Interplanetary Network (IPN), for which the position is constrained by at least one annulus on the celestial sphere. For each burst, I have checked whether its IPN 3...

We present far-infrared spectral line observations of five galaxies from the Little Things sample: DDO 69, DDO 70, DDO 75, DDO 155, andWLM.While most studies of dwarfs focus on bright systems or starbursts due to observational constraints, our data extend the observed parameter space into the regime of low surface brightness dwarf galaxies with low metallicities and moderate star formation rate...

We present deep H I 21-cm and optical observations of the face-on spiral galaxy M 83 obtained as part of a project to search for high-velocity clouds (HVCs) in nearby galaxies. Anomalous-velocity neutral gas is detected toward M 83, with 5.6×10 M⊙ of H I contained in a disk rotating 40–50 km s more slowly in projection than the bulk of the gas. We interpret this as a vertically extended thick d...

We present CO(1-0) and H I (21-cm) observations of the central region of the wet merger remnant NGC 34. The Combined Array for Research in Millimeter-wave Astronomy (CARMA) observations detect a regularly rotating disk in CO with a diameter of 2.1 kpc and a total molecular hydrogen mass of (2.1 ± 0.2) × 10 M⊙. The rotation curve of this gas disk rises steeply, reaching maximum velocities at 1 (...