نتایج جستجو برای: ناحیه bulge

تعداد نتایج: 29277  

Journal: :SIAM J. Matrix Analysis Applications 2002
Karen Braman Ralph Byers Roy Mathias

This paper presents a small-bulge multishift variation of the multishift QR algorithm that avoids the phenomenon of shift blurring, which retards convergence and limits the number of simultaneous shifts. It replaces the large diagonal bulge in the multishift QR sweep with a chain of many small bulges. The small-bulge multishift QR sweep admits nearly any number of simultaneous shifts—even hundr...

2015
Kubwimana M. Mhayamaguru Russel Means Arthur B. Sanders Richard Amini

PATIENT PRESENTATION A 61-year-old female presented to the emergency department complaining of constipation and vaginal bulge with valsalva 89 days after a robotic-assisted hysterectomy. The patient had intercourse three days prior to presentation and experienced postcoital abdominal discomfort with vaginal bleeding. She denied any other trauma. She had no other complaints and denies fevers, ch...

2002
R. J. McLure J. S. Dunlop

New virial black-hole mass estimates are presented for a sample of 72 AGN covering three decades in optical luminosity. Using a model in which the AGN broad-line region (BLR) has a flattened geometry, we investigate the M bh − L bulge relation for a combined 90-object sample, consisting of the AGN plus a sample of 18 nearby inactive elliptical galaxies with dynamical black-hole mass measurement...

Journal: :Monthly Notices of the Royal Astronomical Society 2022

The origin of the quenching in galaxies is still highly debated. Different scenarios and processes are proposed. We use multi-band (400-1600 nm) bulge-disc decompositions massive redshift range 0<z<2 to explore distribution evolution log SFR-logM* plane as a function stellar mass-weighted bulge-to-total ratio (BTM) also for internal galaxy components (bulge/disc) separately. find evidence clear...

1998
Shude Mao

We suggest that the bulge-to-disc ratios of spiral galaxies are primarily determined by the angular momenta of their host haloes predicted in current hierarchical clustering models for structure formation. Gas with low specific angular momentum becomes self-gravitating and presumably forms stars before it can settle into a rotationally supported disc. We assume this part of the gas in a dark ha...

2006
M. Zoccali

We spectroscopically characterize the Galactic Bulge to infer its star formation timescale, compared to the other Galactic components, through the chemical signature on its individual stars. We derived iron and oxygen abundances for 50 K giants in four fields towards the Galactic bulge. High resolution (R=45,000) spectra for the target stars were collected with FLAMES-UVES at the VLT. Oxygen, a...

2001
David Merritt Laura Ferrarese

We analyze a sample of 32 galaxies for which a dynamical estimate of the mass of the hot stellar component, M bulge , is available. For each of these galaxies, we calculate the mass of the central black hole, M • , using the tight empirical correlation between M • and the bulge stellar velocity dispersion. The frequency function N [log(M • /M bulge)] is reasonably well described as a Gaussian w...

2000
Habib G. Khosroshahi Yogesh Wadadekar Ajit Kembhavi

Using a two-dimensional galaxy image decomposition technique, we extract global bulge and disk parameters for a complete sample of early type disk galaxies in the near infrared K band. We find significant correlation of the bulge parameter n with the central bulge surface brightness μb(0) and with effective radius re. Using bivariate analysis techniques, we find that logn, log re and μb(0) are ...

2002
Konrad Kuijken

We report proper motion dispersions for stars in the direction of two fields of the Galactic bulge, using HST/WFPC2 images taken six years apart. Our two fields are Baade’s Window (l, b) = (1.13◦,−3.77◦) and Sgr I (l, b) = (1.25◦,−2.65◦). Our proper motion dispersions are in good agreement with prior groundand space-based proper motion studies in bulge fields, but in contrast to some prior stud...

Abdoljalil Kalantar Hormozi, Seyed Reza Rafei,

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...

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