Results 131 to 140 of about 208,454 (264)

RR Lyrae binary systems in the Galactic bulge

EPJ Web of Conferences, 2017
The possibility of a direct mass measurement of RR Lyrae variable stars in binary systems has remained elusive for many years, due to the apparent paucity of such systems.
Hajdu Gergely, Catelan Márcio
doaj   +1 more source

Are the Ogle Microlenses in the Galactic Bar?

, 1994
The analysis of the first two years of OGLE data revealed 9 microlensing events of the galactic bulge stars, with the characteristic time scales in the range $ 8.6 < t_0 < 62 $ days, where $ t_0 = R_E / V $.
Kaluzny, J., Krzeminski, W., Kubiak, M., Mateo, M., Paczynski, B., Stanek, K. Z., Szymanski, M., Udalski, A.   +7 more
core   +2 more sources

The inner Galactic bulge: evidence for a nuclear bar?

, 2011
Recent data from the VVV survey have strengthened evidence for a structural change in the Galactic bulge inwards of |l|
Alves, Barazza, Benjamin, Binney, Bissantz, Brown, Erwin, Fux, Fux, Gerhard, Martinez-Valpuesta, Martinez-Valpuesta, Namekata, Nishiyama, Peletier, Shen, Yusef-Zadeh, Zhao   +17 more
core   +1 more source

Bursty stellar populations and obscured active galactic nuclei in galaxy bulges [PDF]

, 2007
Vivienne Wild, Guinevere Kauffmann, Timothy M. Heckman, S. Charlot, Gerard Lemson, J. Brinchmann, Timothy A. Reichard, A. Pasquali   +7 more
openalex   +1 more source

A Breakdown of the Black Hole–Bulge Mass Relation in Local Active Galaxies

The Astrophysical Journal
We investigate the relation between black hole (BH) mass and bulge stellar mass for a sample of 117 local ( z ∼ 0) galaxies hosting low-luminosity, broad-line active galactic nuclei (AGNs).
Megan R. Sturm, Amy E. Reines
doaj   +1 more source

The WFC3 Galactic Bulge Treasury Program: Metallicity Estimates for the Stellar Population and Exoplanet Hosts

, 2010
We present new UV-to-IR stellar photometry of four low-extinction windows in the Galactic bulge, obtained with the Wide Field Camera 3 on the Hubble Space Telescope (HST).
Anderson, Jay, Bond, Howard E., Brown, Thomas M., Casertano, Stefano, Ferguson, Henry C., Jeffery, Elizabeth J., Livio, Mario, Minniti, Dante, Panagia, Nino, Renzini, Alvio, Sahu, Kailash, Smith, Ed, Tumlinson, Jason, Valenti, Elena, Valenti, Jeff A., VandenBerg, Don A., Zoccali, Manuela   +16 more
core   +1 more source

Theoretical Models of the Galactic Bulge [PDF]

, 2015
Juntai Shen, Zhao‐Yu Li
openalex   +1 more source

Tracing Back a Second-generation Star Stripped from Terzan 5 by the Galactic Bar

The Astrophysical Journal Letters
The Galactic bulge hosts the Milky Way’s oldest stars, possibly coming from disrupted globular clusters (GCs) or the bulge’s primordial building blocks, making these stars witnesses to the Galaxy’s early chemical enrichment.
Stefano O. Souza, Marica Valentini, Cristina Chiappini, Angeles Pérez-Villegas, Josefina Montalbán, Diego Bossini, Beatriz Barbuy, Yvonne Elsworth, Rafael A. Garcia   +8 more
doaj   +1 more source

Two Red Clumps and the X-Shaped Milky Way Bulge

, 2010
From 2MASS infra-red photometry we find two red clump (RC) populations co-existing in the same fields toward the Galactic bulge at latitudes |b|>5.5 deg., ranging over ~13 degrees in longitude and 20 degrees in latitude.
McWilliam, Andrew, Zoccali, Manuela
core   +1 more source

Mass Distribution in Rotating Thin-Disk Galaxies According to Newtonian Dynamics

Galaxies, 2014
An accurate computational method is presented for determining the mass distribution in a mature spiral galaxy from a given rotation curve by applying Newtonian dynamics for an axisymmetrically rotating thin disk of finite size with or without a central ...
James Q. Feng, C. F. Gallo
doaj   +1 more source