- ID:
- ivo://CDS.VizieR/J/A+A/532/A36
- Title:
- Galilean satellites mutual events in 2009
- Short Name:
- J/A+A/532/A36
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Photometry of mutual events between natural satellites has been verified to be a most effective and accurate ground-based method for obtaining accurate astrometric data through fitting the light curves observed during these events, and it will be valuable to develop the orbital models of the natural satellites. Mutual occultations of J2 Europa by J1 Io (Aug 28, 2009), J1 Io by J2 Europa (Nov 9 and Dec 11, 2009) and J1 Io by J3 Ganymede (Nov 28, 2009) were observed at Yunnan Observatory during the PHEMU09 international campaign. We will calculate the astrometric data of satellites by analyzing and fitting the light curves we got. The same model proposed by N.V. Emelianov (2003SoSyR..37..314E) was used to fit the light curves, with the Lommel-Seeliger scattering law taking into account. Dynamical quantities, such as the deviation of the observed relative satellite motion from the theoretical motion provided by the relevant ephemeris denoted as Dx and Dy, impact parameter and mid-time corresponding to the impact parameter, were obtained for each event respectively. These results have an accuracy of about several mas to 90mas for Dx and Dy and 0.31-2.97s for mid-time. The residuals in determination of longitude shifts (delta(l1) for J1 Io and delta(l2) for J2 Europa) explaining the shifts of the mid-times of the events, were also calculated in the section of discussion which is around 10km with the best ephemerides.
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Search Results
- ID:
- ivo://CDS.VizieR/J/A+AS/112/439
- Title:
- Globular cluster NGC 5286
- Short Name:
- J/A+AS/112/439
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present results of photoelectrically calibrated CCD BVRI photometry of 1391 stars in the globular cluster NGC 5286.
- ID:
- ivo://CDS.VizieR/J/AcA/48/455
- Title:
- Globular Clusters in M31 and M33
- Short Name:
- J/AcA/48/455
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have used the data from the DIRECT project to search for new globular cluster candidates in the M31 and M33 galaxies. We have found 67 new objects in M31 and 35 in M33 and confirmed 38 and 16 previously discovered ones. A VI and BVI photometry has been obtained for all clusters in M31 and M33, respectively. Luminosity functions have been constructed for the clusters in each galaxy and compared with that of the Milky Way.
- ID:
- ivo://CDS.VizieR/J/AJ/119/1562
- Title:
- gri photometry of 48 galaxy clusters
- Short Name:
- J/AJ/119/1562
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present gri CCD photometry of 44 Abell clusters and four cluster candidates. Twenty-one clusters in our sample have spectroscopic redshifts. Fitting a relation between mean g, r, and i magnitudes and redshift for this subsample, we have calculated photometric redshifts for the remainder with an estimated accuracy of approximately 0.03. The resulting redshift range for the sample is 0.03 < z < 0.38. Color-magnitude diagrams are presented for the complete sample and used to study evolution of the galaxy population in the cluster environment.
- ID:
- ivo://CDS.VizieR/J/other/RMxAA/38.141
- Title:
- Haffner 19 UBV(RI)_c_ photometry
- Short Name:
- J/other/RMxAA/38
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present broad-band UBV(RI)_c_ CCD imagery of 334 stars in the direction of the Galactic cluster Haffner 19. The sample is complete to m{lambda}=19 ({lambda} = U, B, V, R, I). We reliably establish the cluster membership for 102 stars based upon their locations in the (V, B-V), (V, V-I), (I, R-I), (U-B, B-V), and (V-R, V-I) diagrams, thus increasing three-fold the number of known cluster members. With the Q-method we determine the MK spectral types of the 33 brightest stars, confirming that 29 belong to the cluster's young population (15 B0-B1 and 14 B2- B9 main sequence stars). Complementary uvby{beta} photoelectric photometry of 6 bright stars independently confirms the distance and reddening to the cluster.
- ID:
- ivo://CDS.VizieR/J/MNRAS/384/1277
- Title:
- H{alpha} emission line sources from IPHAS
- Short Name:
- J/MNRAS/384/1277
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the first catalogue of point-source H{alpha} emission line objects selected from the INT/WFC Photometric H{alpha} Survey of the Northern Galactic Plane (IPHAS). In total, our catalogue contains 4853 point sources that exhibit strong photometric evidence for H{alpha} emission. The catalogue is a conservative subset of the emitters present in IPHAS and it is likely that there are many more H{alpha} emitters present in the area of the Galactic Plane that IPHAS observes. Our selection criteria are designed to be conservative (rather than complete) in order to avoid a significant number of false positives in the catalogue. In line with this, we find that of the ~300 catalogue sources for which we have preliminary spectroscopic follow-up observations, more than 95% are confirmed as genuine emission-line sources.
- ID:
- ivo://CDS.VizieR/J/A+A/393/389
- Title:
- H{alpha} in HII regions in spiral galaxies
- Short Name:
- J/A+A/393/389
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In this paper we study long slit spectra in the region of H{alpha} emission line of a sample of 111 spiral galaxies with recognizable and well defined spiral morphology and with a well determined environmental status, ranging from isolation to non-disruptive interaction with satellites or companions. The form and properties of the rotation curves are considered as a function of the isolation degree, morphological type and luminosity. The line ratios are used to estimate the metallicity of all the detected H II regions, thus producing a composite metallicity profile for different types of spirals. We have found that isolated galaxies tend to be of later types and lower luminosity than the interacting galaxies. The outer parts of the rotation curves of isolated galaxies tend to be flatter than in interacting galaxies, but they show similar relations between global parameters. The scatter of the Tully-Fisher relation defined by isolated galaxies is significantly lower than that of interacting galaxies. The [NII]/H{alpha} ratios, used as a metallicity indicator, show a clear trend between Z and morphological type, t, with earlier spirals showing higher ratios; this trend is tighter when instead of t the gradient of the inner rotation curve, G, is used; no trend is found with the change in interaction status. The Z-gradient of the disks depends on the type, being almost flat for early spirals, and increasing for later types. The [NII]/H{alpha} ratios measured for disk H II regions of interacting galaxies are higher than for normal/isolated objects, even if all the galaxy families present similar distributions of H{alpha} equivalent width.
- ID:
- ivo://CDS.VizieR/J/ApJ/733/116
- Title:
- HAT-P-28 and HAT-P-29 photometry
- Short Name:
- J/ApJ/733/116
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the discovery of two transiting exoplanets. HAT-P-28b orbits a V=13.03 G3 dwarf star with a period P=3.2572 days and has a mass of 0.63+/-0.04M_J_ and a radius of 1.21^+0.11^_-0.08_R_J_ yielding a mean density of 0.44+/-0.09g/cm^3^. HAT-P-29b orbits a V=11.90 F8 dwarf star with a period P=5.7232 days and has a mass of 0.78^+0.08^_-0.04_M_J_ and a radius of 1.11^+0.14^_-0.08_R_J_ yielding a mean density of 0.71+/-0.18g/cm^3^. We discuss the properties of these planets in the context of other known transiting planets
- ID:
- ivo://CDS.VizieR/J/A+A/620/A142
- Title:
- HAT-P-12b 2016-2017 light curve
- Short Name:
- J/A+A/620/A142
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Two independent investigations of the atmosphere of the hot Jupiter HAT-P-12b by two different groups resulted in discrepant solutions. Using broad-band photometry from the ground, one study found a flat and featureless transmission spectrum which was interpreted as a gray absorption by dense cloud coverage. The second study made use of the Hubble Space Telescope (HST) observations and found Rayleigh scattering at optical wavelengths caused by haze. The main purpose of this work is to find the source of this inconsistency and provide feedback to prevent similar discrepancies in future analyses of other exoplanetary atmospheres. We studied the observed discrepancy via two methods. With further broad-band observations in the optical wavelength regions, we strengthened the previous measurements in precision and with a homogeneous reanalysis of the published data, we managed to assess the systematic errors and the independent analyses of the two different groups. Repeating the analysis steps of both works, we found that deviating values for the orbital parameters are the reason for the aforementioned discrepancy. Our work showed a degeneracy of the planetary spectral slope with these parameters. In a homogeneous reanalysis of all data, the two literature data sets and the new observations converge to a consistent transmission spectrum, showing a low-amplitude spectral slope and a tentative detection of potassium absorption.
- ID:
- ivo://CDS.VizieR/J/AJ/144/139
- Title:
- HAT-P-39, HAT-P-40, and HAT-P-41 follow-up
- Short Name:
- J/AJ/144/139
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report the discovery of three new transiting extrasolar planets orbiting moderately bright (V=11.1, 11.7, and 12.4) F stars. The planets HAT-P-39b through HAT-P-41b have periods of P=3.5439days, 4.4572days, and 2.6940days, masses of 0.60M_J_, 0.62M_J_, and 0.80M_J_, and radii of 1.57R_J_, 1.73R _J_, and 1.68R_J_, respectively. They orbit stars with masses of 1.40 M _{sun}_, 1.51 M_{sun}_, and 1.51 M_{sun}_, respectively. The three planets are members of an emerging population of highly inflated Jupiters with 0.4M_J_<M<1.5M_J_ and R>1.5R_J_.
