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16501. uvby{beta} photometric catalog toward Anticenter
ID:
ivo://CDS.VizieR/J/A+A/549/A78
Title:
uvby{beta} photometric catalog toward Anticenter
Short Name:
J/A+A/549/A78
Date:
21 Oct 2021
Publisher:
CDS
Description:
A uvbyH{beta} Stromgren photometric survey covering 16sq.deg in the anticenter direction was carried out using the Wide Field Camera (WFC) at the Isaac Newton Telescope (INT), with a typical seeing of 1-1.5". Data from three different observing runs (2009A, 2010B, 2011A) were used for the catalog. The calibration to the standard system was undertaken using open clusters. A main catalog of 35974 stars with all Stromgren indexes, and a more extended one with 96980 stars with partial data. The central 8sq.deg have a limiting magnitude of V=17mag while the outer region reaches V=15.5mag. Two catalogs are available, the first one with the final mean values and a second one with all the individual measurements for each star.
16502. uvby{beta} photometry in Carina. II
ID:
ivo://CDS.VizieR/J/A+A/514/A59
Title:
uvby{beta} photometry in Carina. II
Short Name:
J/A+A/514/A59
Date:
21 Oct 2021
Publisher:
CDS
Description:
In recent years a significant development has become evident in the study of the stellar structure of the Galactic disk. This is especially true for the 3rd Galactic quadrant, where the stellar population was extensively investigated beyond 10kpc, revealing details about the warped geometry of the thin and thick disks and outer arm. The 4th Galactic quadrant offers even better opportunity to follow the distribution of the young stellar populace to a large distance, since the line of sight is parallel to the largest single segment of a spiral arm seen from our position in the Galaxy: the Carina spiral feature. This paper further contributes to the study of the structure of the Galactic disk in the direction of Carina field utilizing homogeneous photometric distances of a sample of about 600 bright early-type stars seen in this direction up to 6kpc. The derived stellar distances are based on uvby{beta} photometry. All O and B type stars with uvby{beta} data presently available are included in the study.
16503. uvby-beta photometry in Cen-Cru-Mus-Cha
ID:
ivo://CDS.VizieR/J/A+AS/112/95
Title:
uvby-beta photometry in Cen-Cru-Mus-Cha
Short Name:
J/A+AS/112/95
Date:
21 Oct 2021
Publisher:
CDS
Description:
Stroemgren uvby{beta} photometry has been collected for a total of 1017 stars earlier than G0 lying in an area of the sky containing the Southern Coalsack, the Musca, and the Chamaeleon dark clouds. The targets were selected from the SAO star catalog, and the results give V, b-y, m_1_, c_1_, and {beta} on the standard systems, with overall rms errors for one observation of one star of 0.008mag , 0.004mag , 0.006mag , 0.009mag , and 0.011mag , respectively.
16504. uvby{beta} photometry in 3 EUV shadow directions
ID:
ivo://CDS.VizieR/J/A+AS/130/477
Title:
uvby{beta} photometry in 3 EUV shadow directions
Short Name:
J/A+AS/130/477
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the uvby{beta} data used to locate the dust and derive distances for nearby diffuse interstellar clouds in the EUV shadows lb27-31, lb165-32 and lb329+46 discovered by the Extreme Ultraviolet Explorer. The photometrically derived parallaxes of our program stars are compared to the parallaxes listed in the Hipparcos Catalog. Within the photometric distance limit of 150pc, the photometric parallaxes of 21 ``normal" stars are consistent with the Hipparcos measurements within an uncertainty of 15%. Much as expected for the Stroemgren system. Since all program stars are brighter than V=~11.5 most of them are included in the Tycho photometry. For our sample of ~200 stars we find V_by_ and V_T_ to be consistent. Few stars are common to published uvby{beta} catalogs, ~10, V and the indices compare well apart from {beta} where a zero point difference of 11mmag is noticed.
16505. uvby{beta} photometry in Norma
ID:
ivo://CDS.VizieR/J/PASP/121/1326
Title:
uvby{beta} photometry in Norma
Short Name:
J/PASP/121/1326
Date:
21 Oct 2021
Publisher:
CDS
Description:
This investigation presents a study of the Galactic structure toward the Norma section of the Milky Way. The field studied is located between 325{deg} and 335{deg} Galactic longitude and -8{deg} to 8{deg} Galactic latitude. New observations in the uvby{beta} system are combined with all uvby{beta} data currently available to collate a sample of 130 O and B stars. A uniform procedure is applied to obtain the color excesses and stellar distances for all of the stars in the sample. The sample is magnitude limited to about V=9.5mag and contains the brightest stars of the open clusters NGC 6087 and Ly 6, the field 2158 of Loden, the OB association Nor OB1, and stars located in the directions of R 103 and R 105.
16506. uvby-beta photometry in SA 203
ID:
ivo://CDS.VizieR/J/A+AS/93/373
Title:
uvby-beta photometry in SA 203
Short Name:
J/A+AS/93/373
Date:
21 Oct 2021
Publisher:
CDS
Description:
Results are presented of Stromgren uvby(beta) photometry for 213 stars earlier than G0 and brigher than mpg of about 10.7mag in Selected Area 203. The observed area lies close to the geometric center of the Chamaeleon-Musca dark clouds complex. The results yield V, (b-y), m1, c1, and beta on the standard systems, with overall rms errors for one observation of one star of 0.010, 0.004, 0.007, 0.009, and 0.011, respectively.
16507. uvby-beta photometry in star-forming regions
ID:
ivo://CDS.VizieR/J/A+AS/104/557
Title:
uvby-beta photometry in star-forming regions
Short Name:
J/A+AS/104/557
Date:
21 Oct 2021
Publisher:
CDS
Description:
(no description available)
16508. uvby-{beta} photometry of A and F southern stars
ID:
ivo://CDS.VizieR/J/PASP/108/772
Title:
uvby-{beta} photometry of A and F southern stars
Short Name:
J/PASP/108/772
Date:
21 Oct 2021
Publisher:
CDS
Description:
Photometric color excesses and distances plus heliocentric coordinates are calculated for 3762 southern A and early-F stars. The present results, combined with those previously published for the Northern Hemisphere, complete the coverage of the spatial distribution of interstellar reddening in the entire solar neighborhood. The new reddening maps show that the interstellar matter within 300pc of the Sun forms a single very large cloud complex that is somewhat asymmetrical with respect to both the galactic center and the galactic plane. This complex is characterized by pronounced local irregularities in both density and spatial extent. The observations further indicate that (1) the cloud complex is not associated with Gould's belt; (2) there exist large regions of the sky devoid of dust; (3) interstellar reddening is negligible at the galactic poles; (4) the role of intercloud dust in the Southern Hemisphere is minor although more important than in the Northern Hemisphere; (5) the Sun is not located in a dust-free, spherically symmetric bubble as previously thought; and (6) the Sun is, however, located in an elongated dust-free region known as the "local trough."
16509. uvby{beta} photometry of early type stars
ID:
ivo://CDS.VizieR/J/A+A/528/A148
Title:
uvby{beta} photometry of early type stars
Short Name:
J/A+A/528/A148
Date:
21 Oct 2021
Publisher:
CDS
Description:
The {beta} Cephei stars and slowly pulsating B (SPB) stars are massive main sequence variables. The strength of their pulsational driving strongly depends on the opacity of iron-group elements. As many of those stars naturally occur in young open clusters, whose metallicities can be determined in several fundamental ways, it is logical to study the incidence of pulsation in several young open clusters. To provide the foundation for such an investigation, Stroemgren-Crawford uvby{beta} photometry of open cluster target stars was carried out to determine effective temperatures, luminosities, and therefore cluster memberships. In the course of three observing runs, uvby{beta} photometry for 168 target stars was acquired and transformed into the standard system by measurements of 117 standard stars. The list of target stars also included some known cluster and field {beta} Cephei stars, as well as {beta} Cephei and SPB candidates that are targets of the asteroseismic part of the Kepler satellite mission. The uvby{beta} photometric results are presented. The data are shown to be on the standard system, and the properties of the target stars are discussed: 140 of these are indeed OB stars, a total of 101 targets lie within the {beta} Cephei and/or SPB star instability strips, and each investigated cluster contains such potential pulsators. These measurements will be taken advantage of in a number of subsequent publications.
16510. uvby{beta} photometry of h and chi Per
ID:
ivo://CDS.VizieR/J/A+A/394/479
Title:
uvby{beta} photometry of h and chi Per
Short Name:
J/A+A/394/479
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present CCD uvby{beta} photometry for stars in the nuclei of the young double cluster {h} and {chi} Persei. We find that the reddening is highly variable through the {h} Per nucleus, increasing from west to east, with values ranging from E(b-y)=0.328+/-0.022 in the western part to E(b-y)=0.465+/-0.025 in the south-east. Towards {chi} Persei the reddening is fairly constant, with E(b-y)=0.398+/-0.025. Both clusters share a common distance modulus of 11.7+/-0.1mag, and an age of logt=7.10+/-0.05 years.

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