- ID:
- ivo://CDS.VizieR/J/AJ/140/844
- Title:
- UCAC3 proper motion survey
- Short Name:
- J/AJ/140/844
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This paper presents 442 new proper motion stellar systems in the southern sky between declinations -90{deg} and -47{deg} with 0.40"/yr>{mu}>=0.18"/yr. These systems constitute a 25.3% increase in new systems for the same region of the sky covered by previous SuperCOSMOS RECONS (SCR) searches that used Schmidt plates as the primary source of discovery. Among the new systems are 25 multiples, plus an additional 7 new common proper motion (CPM) companions to previously known primaries. All stars have been discovered using the third U.S. Naval Observatory (USNO) CCD Astrograph Catalog (UCAC3). A comparison of the UCAC3 proper motions to those from the Hipparcos, Tycho-2, Southern Proper Motion (SPM4), and SuperCOSMOS efforts is presented and shows that UCAC3 provides similar values and precision to the first three surveys.
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/J/ApJ/745/118
- Title:
- UCAC3 proper motion survey. II. -47<DEC<0{deg}
- Short Name:
- J/ApJ/745/118
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present 474 new proper motion stellar systems (500 objects) in the southern sky having no previously known components, with 0.40"/yr>{mu}>=0.18"/yr between declinations -47{deg} and 0{deg}. In this second paper utilizing the U.S. Naval Observatory third CCD Astrograph Catalog (UCAC3) we complete our sweep of the southern sky for objects in the proper motion range targeted by this survey with R magnitudes ranging from 9.80 to 19.61. The new systems contribute a ~16% increase in the number of new stellar systems for the same region of sky reported in previous SuperCOSMOS Research Consortium On Nearby Stars (RECONS) surveys. Among the newly discovered stellar systems are 16 multiples, plus an additional ten components that are new common proper motion companions to previously known objects. A comparison of UCAC3 proper motions to those from Hipparcos, Tycho-2, Southern Proper Motion, and SuperCOSMOS indicates that all proper motions are consistent to ~10mas/yr, with the exception of SuperCOSMOS. Distance estimates are derived for all stellar systems having SuperCOSMOS Sky Survey B_J_, R_59F_, and I_IVN_ plate magnitudes and Two Micron All Sky Survey (2MASS) infrared photometry. We find five new red dwarf systems estimated to be within 25pc. These discoveries support results from previous proper motion surveys suggesting that more nearby stellar systems are to be found, particularly in the fainter, slower moving samples. In this second paper utilizing the UCAC3 we complete our sweep of the southern sky for objects in the proper motion range targeted by this survey with R magnitudes ranging from 9.80 to 19.61.
- ID:
- ivo://CDS.VizieR/J/ApJ/737/86
- Title:
- UCD galaxies in the Coma cluster
- Short Name:
- J/ApJ/737/86
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have undertaken a spectroscopic search for ultra-compact dwarf galaxies (UCDs) in the dense core of the dynamically evolved, massive Coma cluster as part of the Hubble Space Telescope/Advanced Camera for Surveys (HST/ACS) Coma Cluster Treasury Survey. UCD candidates were initially chosen based on color, magnitude, degree of resolution within the ACS images, and the known properties of Fornax and Virgo UCDs. Follow-up spectroscopy with Keck/Low-Resolution Imaging Spectrometer confirmed 27 candidates as members of the Coma cluster, a success rate >60% for targeted objects brighter than M_R_=-12. Another 14 candidates may also prove to be Coma members, but low signal-to-noise spectra prevent definitive conclusions.
- ID:
- ivo://CDS.VizieR/J/MNRAS/428/1128
- Title:
- UDS/COSMOS HiZELS galaxies
- Short Name:
- J/MNRAS/428/1128
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This paper presents new deep and wide narrow-band surveys undertaken with United Kingdom Infrared Telescope (UKIRT), Subaru and the Very Large Telescope (VLT), a unique combined effort to select large, robust samples of H{alpha} star-forming galaxies at z = 0.40, 0.84, 1.47 and 2.23 (corresponding to look-back times of 4.2, 7.0, 9.2 and 10.6Gyr) in a uniform manner over ~2deg^2^ in the Cosmological Evolution Survey and Ultra Deep Survey fields. The deep multi-epoch H{alpha} surveys reach a matched 3{sigma} flux limit of ~3M_{sun}_/yr out to z=2.2 for the first time, while the wide area and the coverage over two independent fields allow us to greatly overcome cosmic variance and assemble by far the largest samples of H{alpha} emitters. Catalogues are presented for a total of 1742, 637, 515 and 807 H{alpha} emitters, robustly selected at z = 0.40, 0.84, 1.47 and 2.23, respectively, and used to determine the H{alpha} luminosity function and its evolution.
- ID:
- ivo://CDS.VizieR/J/A+A/528/A36
- Title:
- u*g'r'i' photometry of A496 faint LSB galaxies
- Short Name:
- J/A+A/528/A36
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Cluster faint low surface brightness galaxies (fLSBs) are difficult to observe. Consequently, their origin, physical properties and number density are not well known. After a first search for fLSBs in the highly substructured Coma cluster, we present here a search for fLSBs in the nearly relaxed Abell 496 cluster. Abell 496 appears to be a much more relaxed cluster than Coma, but still embedded in a large scale filament of galaxies. Our aim is to compare the properties of fLSBs in these two very different clusters, to search for environmental effects.
- ID:
- ivo://CDS.VizieR/J/AJ/126/1720
- Title:
- ugriz and H{alpha} of double-peaked AGN
- Short Name:
- J/AJ/126/1720
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a new sample of 116 double-peaked Balmer line active galactic nuclei (AGNs) selected from the Sloan Digital Sky Survey.
- ID:
- ivo://CDS.VizieR/J/ApJ/834/160
- Title:
- ugriz colors of RR Lyrae stars in SDSS Stripe 82
- Short Name:
- J/ApJ/834/160
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Investigation of period-color (PC) and amplitude-color (AC) relations at the maximum and minimum light can be used to probe the interaction of the hydrogen ionization front (HIF) with the photosphere and the radiation hydrodynamics of the outer envelopes of Cepheids and RR Lyraes. For example, theoretical calculations indicated that such interactions would occur at minimum light for RR Lyrae and result in a flatter PC relation. In the past, the PC and AC relations have been investigated by using either the (V-R)_MACHO_ or (V-I) colors. In this work, we extend previous work to other bands by analyzing the RR Lyraes in the Sloan Digital Sky Survey Stripe 82 Region. Multi-epoch data are available for RR Lyraes located within the footprint of the Stripe 82 Region in five (ugriz) bands. We present the PC and AC relations at maximum and minimum light in four colors: (u-g)_0_, (g-r)_0_, (r-i)_0_, and (i-z)_0_, after they are corrected for extinction. We found that the PC and AC relations for this sample of RR Lyraes show a complex nature in the form of flat, linear or quadratic relations. Furthermore, the PC relations at minimum light for fundamental mode RR Lyrae stars are separated according to the Oosterhoff type, especially in the (g-r)_0_ and (r-i)_0_ colors. If only considering the results from linear regressions, our results are quantitatively consistent with the theory of HIF-photosphere interaction for both fundamental and first overtone RR Lyraes.
- ID:
- ivo://CDS.VizieR/J/AJ/133/1409
- Title:
- u'g'r'i'z' photometry in NGC 188
- Short Name:
- J/AJ/133/1409
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We continue our series of papers describing the results of a photometric survey of open star clusters, primarily in the southern hemisphere, taken in the u'g'r'i'z' filter system. The entire observed sample covered more than 100 clusters, but here we present data only on NGC 188, which is one of the oldest open clusters known in the Milky Way. We fit the Padova theoretical isochrones to our data. Assuming a solar metallicity for NGC 188, we find a distance of 1700+/-100pc, an age of 7.5+/-0.7Gyr, and a reddening E(B-V) of 0.025+/-0.005. This yields a distance modulus of 11.23+/-0.14.
- ID:
- ivo://CDS.VizieR/J/AJ/127/2210
- Title:
- u'g'r'i'z' photometry in NGC 2548 (M48)
- Short Name:
- J/AJ/127/2210
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present initial results of a photometric survey of open star clusters, primarily in the southern hemisphere, taken in the u'g'r'i'z' filter system. While our entire observed sample covers more than 100 clusters, here we present data for NGC 2548 (M48), which is a cluster characterized in the UBV and DDO photometric systems. We compare our results to the published values from other observers and to the Padova theoretical isochrones and metallicity curves. These observations demonstrate that the u'g'r'i'z' filters can play an important role in determining the metallicity of stars and clusters. We begin this series of papers with a study of NGC 2548 because we have obtained data on this cluster not only with our main program telescope, the CTIO Curtis Schmidt, but also with the US Naval Observatory (USNO) 1.0m telescope (the telescope used to define the u'g'r'i'z' system), and with the Sloan Digital Sky Survey (SDSS) 0.5m Photometric Telescope (the photometric monitoring telescope used to calibrate the SDSS 2.5m telescope imaging data). We have used the data from this study to validate our ability to transform measurements obtained on other telescopes to the standard USNO 1.0m u'g'r'i'z' system. This validation is particularly important for very red stars, for which the original u'g'r'i'z' standard star network is poorly constrained.
- ID:
- ivo://CDS.VizieR/J/AJ/119/2598
- Title:
- u'g'r'i'z' photometry of LCRS galaxies
- Short Name:
- J/AJ/119/2598
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present high-quality photometry in the five Sloan Digital Sky Survey filters, u', g', r', i', and z', for 2195 galaxies with spectroscopic redshifts measured by the Las Campanas Redshift Survey. In addition, a polynomial photometric redshift estimator is derived, with an uncertainty of 0.035 out to z=0.25.
