Results 31 to 40 of about 173,443 (344)

Rejuvenation of spiral bulges [PDF]

Proceedings of the International Astronomical Union, 2006
AbstractWe seek to understand whether the stellar populations of galactic bulges show evidence of secular evolution triggered by the presence of the disc. To this end we re-analyse the sample of Proctor & Sansom (2002), deriving stellar population ages and element abundances from absorption line indices as functions of central velocity dispersion ...
Thomas, D, Davies, Roger L.
openaire   +8 more sources

On the star orbits in the Milky-Way bulge [PDF]

Serbian Astronomical Journal, 2000
The Milky-Way bulge is studied through calculating the galactocentric orbits of imaginary bulge stars for initial conditions simulating the bulge. The author assumes a velocity distribution characterized by bulge rotation and isotropy of the residual ...
Ninković S.
doaj   +1 more source

The formation of galactic bulges [PDF]

Proceedings of Baryons in Dark Matter Halos — PoS(BDMH2004), 2004
We summarise some recent results about nearby galactic bulges, relevant to their formation. We highlight a number of significant advances in our understanding of the surface brightness profiles, stellar populations, and especially the very centers of spirals. We also view our own Milky Way as if it were an external galaxy. Our main conclusions are that
Alister W. Graham, Reynier Peletier, Jesús Falcón-Barroso, Marc Balcells   +3 more
openaire   +4 more sources

Growth of galactic bulges by mergers. II. Low-density satellites [PDF]

, 2006
Satellite accretion events have been invoked for mimicking the internal secular evolutionary processes of bulge growth. However, N-body simulations of satellite accretions have paid little attention to the evolution of bulge photometric parameters, to ...
A. C. González-García, Abadi, Abadi, Abraham, Aceves, Aceves, Aguerri, Bertschik, Binggeli, Bournaud, Bournaud, Bunker, Burstein, Casertano, Combes, D'Onghia, de Grijs, de Grijs, de Jong, Debattista, Debattista, Driver, Eggen, Eliche-Moral, Erwin, Erwin, Freeman, Frogel, Gallagher, Gerin, Gilmore, González-García, Gottlöber, Graham, Guthrie, Hasan, Hasan, Helmi, Hernquist, Hernquist, Hernquist, Hernquist, Hinz, Hohl, Huang, Hubble, J. A. L. Aguerri, Kannappan, Kauffmamnn, Kauffmann, Kauffmann, Kauffmann, Khochfar, King, Knapen, Koo, Kormendy, Kormendy, Kormendy, Kuijken, Kuijken, Le Fèvre, Lowenthal, M. Balcells, M. C. Eliche-Moral, MacArthur, Mihos, Mihos, Mihos, Miwa, Möllenhoff, Navarro, Navarro, Navarro, Neistein, Noguchi, Pfenniger, Pizzella, Portinari, Prieto, Quinn, Ravindranath, Sakai, Sellwood, Shu, Silchenko, Simard, Spitzer, Steidel, Toomre, Trujillo, Trujillo, Tóth, van den Bergh, van der Kruit, Velázquez, Walker, Wyse, Zaritsky, Zaritsky, Zaritsky   +100 more
core   +3 more sources

Revisiting the Bulge [PDF]

Developmental Cell, 2004
Two recent papers--one from the group of Elaine Fuchs in Science and the other from the group of George Costarelis in Nature Biotechnology--on the isolation and multipotentiality of adult hair follicle stem cells catapult us ahead in our understanding of epidermal and hair follicle lineages.
openaire   +3 more sources

Reconciling the Galactic Bulge Turnoff Age Discrepancy with Enhanced Helium Enrichment [PDF]

, 2012
We show that the factor $\sim$2 discrepancy between spectroscopic and photometric age determinations of the Galactic bulge main-sequence turnoff can be naturally explained by positing an elevated helium enrichment for the bulge relative to that assumed ...
Bekki, Brown, Brown, Carigi, Catelan, Chung, Clarkson, Dotter, Fulbright, Horiuchi, Johnson, Kuijken, Martinez-Valpuesta, Marín-Franch, Marín-Franch, Milone, Minniti, Nataf, Nataf, Nataf, Piotto, Piotto, Renzini, Rich, Shen, Simha, van Saders   +26 more
core   +1 more source

The Carnegie-Irvine Galaxy Survey. IX. Classification of Bulge Types and Statistical Properties of Pseudo Bulges [PDF]

, 2020
We study the statistical properties of 320 bulges of disk galaxies in the Carnegie-Irvine Galaxy Survey, using robust structural parameters of galaxies derived from image fitting. We apply the Kormendy relation to classify classical and pseudo bulges and characterize bulge dichotomy with respect to bulge structural properties and physical properties of
arxiv   +1 more source

GALACTIC BULGES

Annual Review of Astronomy and Astrophysics, 1997
▪ Abstract  We discuss the present observational and theoretical understanding of the stellar populations of bulges and their implications for galaxy formation and evolution. The place of bulges as key to the Hubble Sequence remains secure, but some old paradigms are giving way to new ones as observations develop. Detailed studies of Local Group bulges
Gerard Gilmore, Marijn Franx, Rosemary F. G. Wyse   +2 more
openaire   +2 more sources

The Nuclear Bulge Extinction [PDF]

AIP Conference Proceedings, 2008
3 pages, 2 figures, published in the proceedings of "A population Explosion", AIP Conference Proceedings Volume 1010, pp.
Andrew J. Gosling, Katherine M. Blundell, Reba M. Bandyopadhyay, Phil Lucas, Reba M. Bandyopadhyay, Stefanie Wachter, Dawn Gelino, Christopher R. Gelino   +7 more
openaire   +4 more sources

Cerebral Blood Flow Disorder in Acute Subdural Hematoma and Acute Intraoperative Brain Bulge

Frontiers in Neurology, 2022
ContextAcute subdural hematoma (ASDH) has a high incidence and high mortality. During surgery for ASDH, brain tissue sometimes rapidly swells and protrudes into the bone window during or after removal of the hematoma.
Liang Xian, Cheng Wang, Liangfeng Wei, Shousen Wang, Shousen Wang   +4 more
doaj   +1 more source