The double nucleus geometry of M31 is currently best explained by the eccentric disk hypothesis of Tremaine, but whether the eccentric disk resulted from the tidal disruption of an inbounding star cluster by a nuclear black hole, or by an m = 1 perturbation of a native nuclear disk, remains debatable. I perform detailed 2-D decomposition of the M31 double nucleus in the Hubble Space Telescope V...

Enzymatic splicing in Archaeal tRNAs is guided by bulgehelix-bulge structural elements, while much less seems to be known about splicing in other small RNAs (sRNAs). We conduct a genome-wide analysis of several archaeal genomes to identify putative BHB elements and compare our findings with available RNA-seq data. We also provide an analysis of the viability of using pattern-based and stochasti...

We use a Monte Carlo technique together with a simple model for the distribution of dust in M31 to investigate the observability and spatial distribution of classical novae in M31. By comparing our model positions of novae to the observed positions, we conclude that most M31 novae come from the disk population, rather than from the bulge population as has been thought. Our results indicate that...

HST has opened the possibility to decompose the surface brightness profiles of galaxies up to significant redshifts and look-back times into r− bulge and exponential disk components. This should allow to study the redshift evolution of bulge and disk luminosity contributions and discriminate between the different formation scenarios for these galaxy components currently discussed, i.e. decide i...

Using the NIRSPEC spectrograph at Keck II, we have obtained infrared echelle spectra covering the range 1.5− 1.8 μm for the moderately reddened bulge globular clusters NGC 6342 and NGC 6528, finding [Fe/H]=–0.60 and –0.17 dex, respectively. We measure an average α-enhancement of ≈ +0.33 dex in both clusters, consistent with previous measurements on other metal rich bulge clusters, and favoring ...

Electron temperatures, densities, ionic and elemental abundances of helium, nitrogen, oxygen, argon, sulfur and neon were derived for a sample of bulge planetary nebulae, representative of its intermediate mass population. Using these results as constraints, a model for the chemical evolution of the galactic bulge was developed. The results indicate that the best fit is achieved using a double-...

The Milky Way is the only galaxy for which we can resolve individual stars at all evolutionary phases, from the Galactic center to the outskirt. The last decade, thanks to the advent of near IR detectors and 8 meter class telescopes, has seen a great progress in the understanding of the Milky Way central region: the bulge. Here we review the most recent results regarding the bulge structure, ag...

rhinoplasty is one of the most common aesthetic procedures in the world. it is the most common aesthetic surgery procedure in iran. achieving complete patient satisfaction is almost impossible but improving the aesthetics and function of the nose is the aim of surgery. this report describes a 34 years old woman with a large bump in the tip of the nose after three times cosmetic rhinoplasties. t...

A long tube with elastic walls containing water is immersed in the sea aligned in the direction of wave travel. The waves generate bulges that propagate at a speed determined by the distensibility of the tube. If the bulge speed is close to the phase velocity of the waves, there is a resonant transfer of energy from the sea wave to the bulge. At the end of the tube, useful energy can be extract...