70 research outputs found
Shopping Motivation, Optimum Stimulation Level, Cognitive Response and Store Patronage Satisfaction: a Case of Indonesia
This study focuses on the relationship between shopping motivation including t he optimum
stimulation level and cognitive response and store patronage satisfaction. Shopping motivation
focuses o n hedonic shopping motivations while cognitive response is measured in terms of the perception o f merchandise quality and the perception of service quality. T he findings show a
moderate relationship between shopping motivation and the perception of merchandise quality and
the perception of service quality.A highly significant correlation exists between the perception of
merchandise quality and t he perception of service quality and store patronages satisfactio
The Optical Gravitational Lensing Experiment. Is Interstellar Extinction Toward the Galactic Center Anomalous?
Photometry of the Galactic bulge, collected during the OGLE-II microlensing
search, indicates high and non-uniform interstellar extinction toward the
observed fields. We use the mean I-band magnitude and V-I color of red clump
stars as a tracer of interstellar extinction toward four small regions of the
Galactic bulge with highly variable reddening. Similar test is performed for
the most reddened region observed in the LMC.
We find that the slope of the location of red clump stars in the
color-magnitude diagrams (CMDs) in the Galactic bulge is significantly smaller
than the slope of the reddening line following the standard extinction law
(R_V=3.1) for approximations of the extinction curve by both Cardelli, Clayton
and Mathis (1989, CCM89) and Fitzpatrick (1999, F99). The differences are much
larger for the CCM89 approximation which, on the other hand, indicates the same
slopes for the control field in the LMC, contrary to the F99 approximation. We
discuss possible systematic effects that could cause the observed discrepancy.
Anomalous extinction toward the Galactic bulge seems to be the most natural
explanation. Our data indicate that, generally, the ratio of the total to
selective absorption, R_VI, is much smaller toward the Galactic bulge than the
value corresponding to the standard extinction curve (R_V=3.1). However, R_VI
varies from one line-of-sight to another.
Our results explain why the red clump and RR Lyr stars in the Baade's window
dereddened with standard value of R_VI are redder compared to those of the
local population.Comment: 16 pages. Accepted for publication in ApJ. Major changes include:
comparison of the OGLE-II photometry with other data, additional comparison
of the observed reddening line with that resulting from approximation of the
standard extinction curve by Fitzpatrick (1999
Survey for Transiting Extrasolar Planets in Stellar Systems IV: Variables in the Field of NGC 1245
The Survey for Transiting Extrasolar Planets in Stellar Systems (STEPSS)
project is a search for planetary transits in open clusters. In this paper, we
analyze the STEPSS observations of the open cluster NGC 1245 to determine the
variable star content of the cluster. Out of 6787 stars observed with V < 22,
of which ~870 are cluster members, we find 14 stars with clear intrinsic
variability that are potential cluster members, and 29 clear variables that are
not cluster members. None of these variables have been previously identified.
We present light curves, finding charts, and stellar/photometric data on these
variable objects. Several of the interacting binaries have estimated distances
consistent with the cluster distance determined from isochrone fits to the
color magnitude diagram. Four stars at the main sequence turnoff of the cluster
have light curves consistent with gamma Doradus variability. If these gamma
Doradus candidates are confirmed, they represent the oldest and coolest members
of this class of variable discovered to date.Comment: 20 pages, 15 figures. Submitted to AJ. PDF version with
full-resolution figures at http://www.astronomy.ohio-state.edu/~pepper/ms.pd
Catalog of fundamental mode RR Lyrae stars in the Galactic bulge from the Optical Gravitational Lensing Experiment
We present a catalog of 1888 fundamental-mode RR Lyrae stars detected in the
Galactic bulge fields of the second phase of the Optical Gravitational Lensing
Experiment (OGLE). The catalog includes basic parameters of the light curves,
identifications of Blazhko frequencies, V-I colors at minimum light (for most
stars), and other information for each star. We detect a high rate of incidence
of the Blazhko phenomenon (at least 27.6%), including unprecedentedly many
frequency triplets, which we attribute to our sensitive search method. We find
that the minimum light V-I color (useful as a reddening indicator) grows slowly
redder with increasing period and exhibits a star-to-star scatter of
approximately 0.07 mag. We use this color to evaluate the zero-point accuracy
of the reddening map of the Galactic bulge derived from OGLE data, and find
that in addition to low-level random errors or resolution effects (responsible
for much of the scatter), the map may systematically over-represent E(V-I) by
approximately 0.05 mag in most fields. We present reasonably robust evidence
that the RR Lyrae-to-red clump color separation is larger by 0.05--0.08 mag in
the bulge than locally, which argues for caution in the use of these stars for
reddening determinations. We consider the RR Lyrae constraint on the
Galactocentric distance, but uncertainty about the absolute magnitude
calibration leaves significant flexibility in the result. In contrast to
previous results, we robustly detect the signature of the Galactic bar in the
RR Lyrae population within the inner plus/minus 3 degrees of longitude, and we
highlight the apparent differences between the structures traced by the red
clump giants and the more metal-poor RR Lyrae stars. (abridged)Comment: Submitted to ApJ, 34 pages aastex including 8 figures, full tables to
appear electronically (temporarily available at
http://www.astro.princeton.edu/~collinge/RR/
Horizontal Branch Stars: The Interplay between Observations and Theory, and Insights into the Formation of the Galaxy
We review HB stars in a broad astrophysical context, including both variable
and non-variable stars. A reassessment of the Oosterhoff dichotomy is
presented, which provides unprecedented detail regarding its origin and
systematics. We show that the Oosterhoff dichotomy and the distribution of
globular clusters (GCs) in the HB morphology-metallicity plane both exclude,
with high statistical significance, the possibility that the Galactic halo may
have formed from the accretion of dwarf galaxies resembling present-day Milky
Way satellites such as Fornax, Sagittarius, and the LMC. A rediscussion of the
second-parameter problem is presented. A technique is proposed to estimate the
HB types of extragalactic GCs on the basis of integrated far-UV photometry. The
relationship between the absolute V magnitude of the HB at the RR Lyrae level
and metallicity, as obtained on the basis of trigonometric parallax
measurements for the star RR Lyrae, is also revisited, giving a distance
modulus to the LMC of (m-M)_0 = 18.44+/-0.11. RR Lyrae period change rates are
studied. Finally, the conductive opacities used in evolutionary calculations of
low-mass stars are investigated. [ABRIDGED]Comment: 56 pages, 22 figures. Invited review, to appear in Astrophysics and
Space Scienc
Influence of rhodium additive on hydrogen electrosorption in palladium-rich PdâRh alloys
The influence of shopping motivation, optimum stimulation level, perception of store atmosphere and satisfaction of repatronage intention
This study focuses on the relationship between shopping motivations, optimum stimulation level, perceptions of store atmosphere, store patronage satisfaction and repatronage intention. Three hundred and thirty shoppers, across three store types, were surveyed over a two week period. The results indicate that shopping motivations have a moderate influence on the perception of interior layout, social factors and store space while OSL has a slight effect on the perception of store atmosphere. Furthermore, the study found that store patronage satisfaction is influenced by the perception of interior layout, social factors and store space. In turn, this store patronage satisfaction affects repatronage intention. In light of the findings, recommendations for retailers are provided
- âŠ