Results 21 to 30 of about 173,443 (344)
Growth of disc-like pseudo-bulges in SDSS DR7 since z = 0.1 [PDF]
, 2022 Cosmological simulations predict more classical bulges than their observational counterpart in the local Universe. Here, we quantify evolution of the bulges since $z=0.1$ using photometric parameters of nearly 39,000 unbarred disc galaxies from SDSS DR7 which are well represented by two components.
arxiv +1 more source
In Silico Analysis of the Age-Dependent Evolution of the Transcriptome of Mouse Skin Stem Cells
Cells, 2020 The stem cells located in the hair follicle bulge area are critical for skin regeneration and repair. To date, little is known about the evolution of the transcriptome of these cells across time. Here, we have combined genome-wide expression analyses and
L. Francisco Lorenzo-Martín +1 more
doaj +1 more source
Angular momentum evolution of bulge stars in disc galaxies in NIHAO [PDF]
, 2018 We study the origin of bulge stars and their angular momentum (AM) evolution in 10 spiral galaxies with baryonic masses above $10^{10}$M$_\odot$ in the NIHAO galaxy formation simulations.
Dutton, Aaron A. +8 more
core +2 more sources
Analysing the structure of the bulge with Mira variables [PDF]
A&A 666, L13 (2022), 2022 The Galactic bulge at latitude $4<|b|$(deg.)$<10$ was claimed to show an X-shape, which means that stellar density distributions along the line of sight have a double peak. However, this double peak is only observed with the red-clump population, and doubt has been cast on its use as a perfect standard candle.\ As such, a boxy bulge without an X-shape ...
arxiv +1 more source
When Is a Bulge Not a Bulge? Inner Disks Masquerading as Bulges in NGC 2787 and NGC 3945 [PDF]
The Astrophysical Journal, 2003 We present a detailed morphological, photometric, and kinematic analysis of two barred S0 galaxies with large, luminous inner disks inside their bars. We show that these structures, in addition to being geometrically disklike, have exponential profiles (scale lengths ~300-500 pc) distinct from the central, nonexponential bulges. We also find them to be
Erwin, Peter +3 more
openaire +4 more sources
Animals, 2020 Circular RNAs (CircRNAs) are a type of non-coding RNAs, which contain a covalently closed loop structure without 5′ to 3′ free ends. CircRNAs play essential roles in the regeneration of secondary hair follicle (SHF) and cashmere growth in goats.
Rong H. Yin +7 more
doaj +1 more source
Chemical Composition of Faint (I~21 mag) Microlensed Bulge Dwarf OGLE-2007-BLG-514S [PDF]
, 2009 We present a high-resolution spectrum of a microlensed G dwarf in the Galactic bulge with spectroscopic temperature T_eff = 5600 +/- 180 K. This I~21 mag star was magnified by a factor ranging from 1160 to 1300 at the time of observation.
Alonso +55 more
core +2 more sources
Publications of the Astronomical Society of Australia, 2013 AbstractBulges are not just elliptical subgalaxies situated in the centers of large spirals, though it might seem so from their ages and chemistry. In fact, bulge kinematics have been known to be different since the first long slit spectra were obtained.
openaire +4 more sources
On the deprojection of the Galactic bulge [PDF]
Monthly Notices of the Royal Astronomical Society, 1996 An algorithm is developed and tested for the problem posed by photometric observations of the bulge of the Milky Way. The latter subtends a non-trivial solid angle on the sky, and we show that this permits inversion of the projected brightness distribution under the assumption that the bulge has three orthogonal mirror planes of specified orientation ...
Binney, James, Gerhard, Ortwin
openaire +4 more sources
YOUNG STARS IN AN OLD BULGE: A NATURAL OUTCOME OF INTERNAL EVOLUTION IN THE MILKY WAY [PDF]
, 2014 The center of our disk galaxy, the Milky Way, is dominated by a boxy/peanut-shaped bulge. Numerous studies of the bulge based on stellar photometry have concluded that the bulge stars are exclusively old.
Bensby, T. +7 more
core +2 more sources