- ID:
- ivo://CDS.VizieR/J/other/POBol/9.3
- Title:
- 12 M92 variables Photographic observations
- Short Name:
- J/other/POBol/9.
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The periods and the light curves of 12 variable stars of the globular cluster M92 have been studied analyzing 176 plates obtained with the 60 cm reflector of Bologna Observatory from 1964 to 1966. Combining the results of the present observations with Hachenberg's (1925, 1933, 1934) and Nassau's (1936), the periods were improved and the O-C diagrams for 9 variables were traced. A parabola well represents the residuals of the variables No. 3, 8 and 11. Variable 9 is likely not strictly periodic.
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/II/331
- Title:
- M68 variable star light curves
- Short Name:
- II/331
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- 110 plates of the globular cluster M68, taken during 1951 to 1953 with the 24-inch reflector of the station of Lojano, have been the subject of a photometric investigation.
- ID:
- ivo://CDS.VizieR/J/AJ/107/622
- Title:
- M68 variable star light curves
- Short Name:
- J/AJ/107/622
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- 20 CCD images of the globular cluster M68, taken during 14th - 17th April 1989 with the 1.5m Danish telescope in La Silla, have been the subject of a photometric investigation.
- ID:
- ivo://CDS.VizieR/J/MNRAS/455/2337
- Title:
- M67 variable stars photometry
- Short Name:
- J/MNRAS/455/2337
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In this paper, we continue the release of high-level data products from the multiyear photometric survey collected at the 67/92cm Schmidt Telescope in Asiago. The primary goal of the survey is to discover and to characterize variable objects and exoplanetary transits in four fields containing five nearby open clusters spanning a broad range of ages. This second paper releases a photometric catalogue, in five photometric bands, of the solar-age, solar-metallicity open cluster M 67 (NGC 2682). Proper motions are derived comparing the positions observed in 2013 at the Asiago's Schmidt Telescope with those extracted from Wide Field Imager@2.2m Max-Planck-Gesellschaft/European Southern Obseratory images in 2000. We also analyse the variable sources within M 67. We detected 68 variables, 43 of which are new detection. Variable periods and proper-motion memberships of a large majority of sources in our catalogue are improved with respect to previous releases. The entire catalogue will be available in electronic format. Besides the general interest on an improved catalogue, this work will be particularly useful because of: (1) the imminent release of Kepler/K2 Campaign-5 data of this clusters, for which our catalogue will provide an excellent, high spatial resolution input list, and (2) characterization of the M 67 stars which are targets of intense High Accuracy Radial velocity Planet Searcher and High Accuracy Radial velocity Planet Searcher for the Northern hemisphere radial-velocity surveys for planet search.
- ID:
- ivo://CDS.VizieR/J/A+A/358/547
- Title:
- M53 variable stars V light curves
- Short Name:
- J/A+A/358/547
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the results of the application of the Image Subtraction Method (ISM) to the CCD observations of the central region of globular cluster M53. We have obtained good quality light curves of the 23 previously known RR Lyrae stars in this cluster. We have also confirmed the variability of ten RR Lyrae candidates discovered by Kravtsov. Moreover, we have found four new variables of this type in the core of the cluster. Altogether, the light curves have been obtained for 37 RR Lyrae stars. We also report the discovery of variations in six cluster bright giants.
- ID:
- ivo://CDS.VizieR/J/AZh/75/231
- Title:
- MV Lyr - bursts and periods
- Short Name:
- J/AZh/75/231
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The analysis of photometric behavior of the nova-like star MV Lyr in B in the low brightness state in 1995-1996 based on the observations performed at the Crimean Astrophysical Observatory with the MTM-500 television system was presented.
- ID:
- ivo://CDS.VizieR/J/other/MmSAI/20.63
- Title:
- M30 V1-V3 variable light curves
- Short Name:
- J/other/MmSAI/20
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- 175 plates of the globular cluster M30 in Capricornus, taken mainly in the years 1946, 1947 and 1948, with the 24-inch reflector, have been the object of a photometric investigation.
- ID:
- ivo://CDS.VizieR/J/A+A/571/L4
- Title:
- MWC 349A Halpha lines with 14<n<24 spectra
- Short Name:
- J/A+A/571/L4
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The UC-HII region of MWC 349A is the prototype of an ionized wind driven by a massive star surrounded by a disk. Recent high angular resolution observations of the millimeter recombination lines have shown that the disk rotates with a Keplerian law in its outer parts. However, the kinematics of innermost regions in the UC-HII region of MWC 349A is still unknown, in particular the radius where the wind is launched from the disk. We performed hydrogen recombination line observations with the Heterodyne Instrument for the Far Infrared (HIFI) onboard the Herschel Space Observatory to study the kinematics of its innermost regions by studying their spectral features. In addition to the two laser peaks, we report the first detection of two new components that are blueshifted with respect to the laser peaks for all the recombination lines with principal quantum number n<22. These new spectral features originate from the region where the wind is ejected from the disk. We used our 3D non-LTE radiative transfer model for recombination lines (MORELI) to show that these features are consistent with the wind being ejected at a radius of about 24 AU from the star, which supports magnetohydrodynamic wind models.
- ID:
- ivo://CDS.VizieR/J/other/NewA/49.43
- Title:
- MWC 560 UBV(RI)c light curves
- Short Name:
- J/other/NewA/49.
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- After 26 years from the major event of 1990, in early 2016 the puzzling symbiotic binary MWC 560 has gone into a new and even brighter outburst. We present our tight BVRCIC photometric monitoring of MWC 560 (451 independent runs distributed over 357 different nights), covering the 2005-2016 interval, and the current outburst in particular. A stricking feature of the 2016 outburst has been the suppression of the short term chaotic variability during the rise toward maximum brightness, and its dominance afterward with an amplitude in excess of 0.5mag. Similar to the 1990 event when the object remained around maximum brightness for ~6 months, at the time Solar conjunction prevented further observations of the current outburst, MWC 560 was still around maximum, three months past reaching it. We place our observations into a long term context by combining with literature data to provide a complete 1928-2016 lightcurve. Some strong periodicities are found to modulate the optical photometry of MWC 560. A period of 1860-days regulate the occurence of bright phases at BVRC bands (with exactly 5.0 cycles separating the 1990 and 2016 outbursts), while the peak brightness attained during bright phases seems to vary with a ~9570-days cycle. A clean 331-day periodicity modulate the Ic lightcurve, where the emission from the M giant dominates, with a lightcurve strongly reminiscent of an ellipsoidal distortion plus irradiation from the hot companion. Pros and cons of 1860 and 331 days as the system orbital period are reviewed, waiting for a spectroscopic radial velocity orbit of the M giant to settle the question (provided the orbit is not oriented face-on).
- ID:
- ivo://CDS.VizieR/J/MNRAS/391/164
- Title:
- MW Lyr BV(RI)c light curves
- Short Name:
- J/MNRAS/391/164
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have obtained the most extensive and most accurate photometric data of a Blazhko variable MW Lyrae (MW Lyr) during the 2006-2007 observing seasons. The data within each 0.05 phase bin of the modulation period (P_m_=1/f_m_) cover the entire light cycle of the primary pulsation period (P_0_=1/f_0_) , making possible a very rigorous and complete analysis.
