- ID:
- ivo://CDS.VizieR/J/A+AS/118/7
- Title:
- Photometry & morphology of UCM galaxies
- Short Name:
- J/A+AS/118/7
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the results of Thuan & Gunn r CCD imaging observations of the Universidad Complutense de Madrid (UCM) sample of emission-line galaxies (ELGs), selected by the presence of H{alpha} emission in low-resolution objective prism spectra. In this work we characterize photometrically and morphologically a total of 212 objects from the UCM survey. This Paper presents the observations and basic reductions, and lists a set of photometric parameters calculated for each UCM object. In addition, for the first time in a ELGs sample, we have determined the morphological classification of the objects using simultaneously five different criteria.
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- ID:
- ivo://CDS.VizieR/J/A+A/403/93
- Title:
- Photometry of AGB stars in NGC 185 and NGC 147
- Short Name:
- J/A+A/403/93
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The tables represent results of an ongoing photometric survey of Local Group galaxies, using a four filter technique based on the method of Wing (1971, Proc. of the Conference on Late-Type Stars, ed. G.W. Lockwood and H.M. Dyck, KPNO Contribution 554, 145) to identify and characterise the late-type stellar content. Two narrow band filters centred on spectral features of TiO and CN allow us to distinguish between AGB stars of different chemistries [M-type (O-rich) and C-type (C-rich)]. The major parts of two dwarf galaxies, NGC 185 and NGC 147, were observed; 154 new AGB carbon stars in NGC 185 and 146 in NGC 147 were identified. All detected stars (called sample 1 in the paper) are included in the tables, with coordinates and photometric properties. All stars of sample 1 have photometry in the filters V and i. For all stars, which are in addition included in the smaller sample 2 (and have also photometry in the narrowband filters TiO and CN) the colour index (TiO-CN) is provided, too. In the tables a chemistry flag F marks in which classification group the star falls. All stars of sample 2 can have "c" for Carbon star, "o" for oxygen-rich M-type star or "r" for the rest. This correspond to the selection areas in Figure 4 of the paper. The flag for all stars of sample 1, which are not already included in sample 2 (only Vi-photometry) is "u" for unclassified.
- ID:
- ivo://CDS.VizieR/J/AJ/154/241
- Title:
- Photometry of a Kuiper Belt object: 2002 CC_249_
- Short Name:
- J/AJ/154/241
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Images of the Kuiper Belt object (126719) 2002 CC_249_ obtained in 2016 and 2017 using the 6.5 m Magellan-Baade Telescope and the 4.3 m Discovery Channel Telescope are presented. A light curve with a periodicity of 11.87+/-0.01 hr and a peak-to-peak amplitude of 0.79+/-0.04 mag is reported. This high amplitude double-peaked light curve can be due to a single elongated body, but it is best explained by a contact binary system from its U-/V-shaped light curve. We present a simple full-width-at-half-maximum test that can be used to determine if an object is likely a contact binary or an elongated object based on its light curve. Considering that 2002 CC_249_ is in hydrostatic equilibrium, a system with a mass ratio q_min_=0.6, and a density {rho}_min_=1 g/cm^3^, or less plausible a system with q_max_=1, and {rho}_max_=5 g/cm^3^ can interpret the light curve. Assuming a single Jacobi ellipsoid in hydrostatic equilibrium and an equatorial view, we estimate {rho}>=0.34 g/cm^3^, and a/b=2.07. Finally, we report a new color study showing that 2002 CC_249_ displays an ultra red surface characteristic of a dynamically Cold Classical trans-Neptunian object.
- ID:
- ivo://CDS.VizieR/J/A+A/483/209
- Title:
- Photometry of a stellar cluster near IRAS 07141-092
- Short Name:
- J/A+A/483/209
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- High-resolution optical UBVRI and H{alpha} images obtained with ALFOSC mounted on the Nordic Optical Telescope (NOT), near-infrared JHK_S_ images obtained with NOTCam at the Nordic Optical Telescope, and VLT/ISAAC images obtained through the H_2_ (2.12{mu}m) filter were all used to make photometric and morphological studies of the point sources and the nebula seen towards Sh2-294. Identification of PMS members was done using three different methods: comparison with isochrones in optical colour-magnitude diagrams and detection of either near-IR excess or H{alpha} emission.
- ID:
- ivo://CDS.VizieR/J/A+A/527/A42
- Title:
- Photometry of asteroid (21) Lutetia
- Short Name:
- J/A+A/527/A42
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- On its journey to comet 67P/Churyumov-Gerasimenko, the International Rosetta Mission (ESA) was planned to fly-by two asteroids: (2867) Steins and (21) Lutetia. Although classified as an M-type asteroid because of its high albedo, its reflectance spectrum in the near and mid-infrared region, suggests a primitive composition, more typical of C-type asteroids. Results from ground-based observations are indicative of compositional variegation and of at least one significantly large crater on the surface of this asteroid. We analyse photometric and spectroscopic data of the asteroid, obtained from ground-based observations, to support the data taken by the spacecraft.
- ID:
- ivo://CDS.VizieR/J/AJ/156/12
- Title:
- Photometry of {beta} Lyrae by the BRITE satellites
- Short Name:
- J/AJ/156/12
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Photometric instabilities of {beta} Lyrae ({beta} Lyr) were observed in 2016 by two red-filter BRITE satellites over more than 10 revolutions of the binary, with ~100 minute sampling. Analysis of the time series shows that flares or fading events take place typically three to five times per binary orbit. The amplitudes of the disturbances (relative to the mean light curve, in units of the maximum out-of-eclipse light flux, f.u.) are characterized by a Gaussian distribution with {sigma}=0.0130+/-0.0004 f.u. Most of the disturbances appear to be random, with a tendency to remain for one or a few orbital revolutions, sometimes changing from brightening to fading or the reverse. Phases just preceding the center of the deeper eclipse showed the most scatter while phases around the secondary eclipse were the quietest. This implies that the invisible companion is the most likely source of the instabilities. Wavelet transform analysis showed the domination of the variability scales at phase intervals 0.05-0.3 (0.65-4 days), with the shorter (longer) scales dominating in numbers (variability power) in this range. The series can be well described as a stochastic Gaussian process with the signal at short timescales showing a slightly stronger correlation than red noise. The signal decorrelation timescale, {tau}=(0.068+/-0.018) in phase or (0.88+/-0.23) days, appears to follow the same dependence on the accretor mass as that observed for active galactic nucleus and quasi-stellar object masses five to nine orders of magnitude larger than the {beta} Lyr torus-hidden component.
- ID:
- ivo://CDS.VizieR/J/AJ/158/148
- Title:
- Photometry of beta Lyr by the BRITE satellites.II
- Short Name:
- J/AJ/158/148
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Observations of {beta} Lyr in four months of 2018 by three BRIght Target Explorer (BRITE) Constellation satellites, the red-filter BRITE-Toronto and BRITE-Heweliusz, and the blue-filter BRITE-Lem, permitted a first, limited look into the light-curve variability in two spectral bands. The variations were found to be well correlated outside the innermost phases of the primary eclipses with the blue variations appearing to have smaller amplitudes than the red; this reduction may reflect their presumed origin in the cooler, outer parts of the accretion disk. This result must be confirmed with more extensive material as the current conclusions are based on observations spanning slightly less than three orbital cycles of the binary. The assumption of an instrumental problem and the applied corrections made to explain the unexpectedly large amplitude of the red-filter light curve observed with the BRITE-Toronto satellite in 2016 are fully confirmed by the 2018 results.
- ID:
- ivo://CDS.VizieR/J/A+A/600/A83
- Title:
- Photometry of beta Pic members
- Short Name:
- J/A+A/600/A83
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We intended to compile the most complete catalogue of bona fide members and candidate members of the beta Pictoris association, and to measure their rotation periods and basic properties from our own observations, from public archives, and exploring the literature. We have carried out a multi-observatories campaign to get our own photometric time series and collected all archived public photometric data time series for the stars in our catalogue. Each time series was analyzed with the Lomb-Scargle and CLEAN periodograms to search for the stellar rotation periods. The measured rotational properties have been complemented with detailed information on multiplicity, membership, and projected rotational velocity available in the literature and discussed star by star. We have measured the rotation periods of 112 out of 117 among bona fide members and candidate members of the beta Pictoris association and, whenever possible, also luminosity, radius, and inclination of the stellar rotation axis. This represents to date the largest catalogue of rotation periods of any young loose stellar association. We have provided an extensive catalogue of rotation periods together with other relevant basic properties useful to explore a number of open issues such as the causes of spread of rotation periods among coeval stars, the evolution of angular momentum, the lithium-rotation connection, among others.
- ID:
- ivo://CDS.VizieR/J/A+A/488/1167
- Title:
- Photometry of bulges at intermediate z
- Short Name:
- J/A+A/488/1167
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Analysis of bulges to redshifts of up to z=1 have provided ambiguous results as to whether bulges as a class are old structures akin to elliptical galaxies or younger products of the evolution of their host disks. We aim to define a sample of intermediate-z disk galaxies harbouring central bulges, and a complementary sample of disk galaxies without measurable bulges. We intend to provide colour profiles for both samples, as well as measurements of nuclear, disk, and global colours, which may be used to constrain the relative ages of bulges and disks. We select a diameter-limited sample of galaxies in images from the HST/WFPC2 (Wide-Field Planetary Camera 2 at the Hubble Space Telescope) Groth Strip survey, which is divided into two subsamples of higher and lower inclination to assess the role of dust in the measured quantities. Mergers are visually identified and excluded. We take special care to control the pollution by ellipticals. The bulge sample is defined with a criterion based on nuclear surface brightness excess over the inward extrapolation of the exponential law fitted to the outer regions of the galaxies. We extract colour profiles on the semi-minor axis least affected by dust in the disk, and measure nuclear colours at 0.85kpc from the centre over those profiles. Disk colours are measured on major axis profiles; global colours are obtained from 2.6" diameter apertures. Colour transformations and K-corrections are calculated using SEDs covering bands UBVIJK, from the GOYA photometric survey. We obtain a parent sample containing 248 galaxies with known redshifts, spectroscopic or photometric, spanning 0.1<z<1.2. The bulge subsample comprises 54 galaxies (21.8% of the total), while the subsample with no measureable bulges is 55.2% of the total (137 galaxies). The remainder (23%) is composed of mergers. We list nuclear, disk, and global colours (observed and rest-frame) and magnitudes (apparent and absolute), as well as galaxy colour gradients for the samples with and without bulges, and make them available in electronic format. We also provide images, colour maps, plots of spectral energy distributions, major-axis surface brightness profiles, and minor-axis colour profiles for both samples.
- ID:
- ivo://CDS.VizieR/J/A+A/496/453
- Title:
- Photometry of candidate members of NGC6611
- Short Name:
- J/A+A/496/453
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the list of candidate members of the young open cluster NGC 6611, selected in a field of view of 33'x34' by the X-rays emission and excesses in infrared bands. X-ray sources without infrared excesses are classified as candidate Class III cluster members; stars with infrared excesses as disk bearing members.
