- ID:
- ivo://CDS.VizieR/J/A+A/433/751
- Title:
- BR photometry of nearby Southern dwarf galaxies
- Short Name:
- J/A+A/433/751
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We carried out CCD photometry in the Johnson-Cousins B and R bands of 23 dwarf galaxies: SDIG, ESO 410-17, KK11, ESO 245-05, KKs3, KK27, KK38, KK40, IC 4662, KK244, KK246, KK247, KK248, KK249, KK253, KK255, KK256, KK257, KK258, KK259, UGCA 438, ESO 347-17, and UGCA 442. Both isolated galaxies and members of the Sculptor group and the NGC 1313 group were observed. The galaxy sample is characterized by a median distance of 9.3Mpc, and median absolute magnitude of -14.8mag. The central surface brightnesses are in the range from 22.2 to 24.4mag/arcsec^2^ in B.
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/J/MNRAS/364/146
- Title:
- BR photometry of NGC 5328 group of galaxies
- Short Name:
- J/MNRAS/364/146
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the results of a photometric and spectroscopic study of seven members of the NGC 5328 group of galaxies, a chain of galaxies spanning over 200kpc (H0=70km/s/Mpc). We analyse the galaxy structure and study the emission-line properties of the group members looking for signatures of star formation and active galactic nucleus activity. We finally attempt to infer, from the modelling of line-strength indices, the stellar population ages of the early-type members.
2133. BR photometry of ON 231
- ID:
- ivo://CDS.VizieR/J/A+A/356/L21
- Title:
- BR photometry of ON 231
- Short Name:
- J/A+A/356/L21
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present R- and B-band CCD observations of ON 231 that were made at the Dark Sky Observatory at Appalachian State University (DSO-data) during 37 nights in April 1998 - December 1999. The observations have been obtained in connection with current microvariability studies but this paper presents only the nightly averaged R and B magnitudes together with other details of these observations. These data were used to verify the 1395-day period proposed from the analysis of the prior data (all B-band data available in the 1971-1997 time interval). To transform R-band observations to B we used the equation: B=1.107*R-0.653.
- ID:
- ivo://CDS.VizieR/J/ApJ/764/5
- Title:
- BR photometry of 2012 precursor flare in OJ287
- Short Name:
- J/ApJ/764/5
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have studied three most recent precursor flares in the light curve of the blazar OJ 287 while invoking the presence of a precessing binary black hole in the system to explain the nature of these flares. Precursor flare timings from the historical light curves are compared with theoretical predictions from our model that incorporate effects of an accretion disk and post-Newtonian description for the binary black hole orbit. We find that the precursor flares coincide with the secondary black hole descending toward the accretion disk of the primary black hole from the observed side, with a mean z-component of approximately z_c_=4000AU. We use this model of precursor flares to predict that precursor flare of similar nature should happen around 2020.96 before the next major outburst in 2022.
- ID:
- ivo://CDS.VizieR/J/A+A/388/29
- Title:
- BR photometry of 25 southern dwarf galaxies
- Short Name:
- J/A+A/388/29
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- File table3 contains a summary of selected B and R photometry data for 72 irregular dwarf galaxies within the 10 Mpc volume. It is supplemented by the indication of their field or group membership and by their rotational velocities as inferred from the literature.
- ID:
- ivo://CDS.VizieR/J/PAZh/27/170
- Title:
- BR photometry of the UMa galaxy supercluster
- Short Name:
- J/PAZh/27/170
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A catalogue of 1192 galaxies in the central regions (30' x 30') of 11 clusters in the Ursa Major supercluster is presented. For each galaxy equatorial and relative coordinates and total B and R_c_ magnitudes and B-R_c_ colour are given. Plates taken with the 2-m Tautenburg Observatory telescope and CCD images obtained with the 6-m and 1-m SAO telescopes are used.
2137. BR photometry of UGC 685
- ID:
- ivo://CDS.VizieR/J/A+AS/134/317
- Title:
- BR photometry of UGC 685
- Short Name:
- J/A+AS/134/317
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- B and R CCD images and J NICMOS3 frames taken with the Calar Alto 3.5m telescope of the dwarf irregular galaxy UGC 685 are presented. The brightest part of the stellar population is resolved in B and R, very few also in J. The stellar color-magnitude diagram is discussed. An estimate of the distance to UGC 685 of 5. 5Mpc is derived based on the brightest blue supergiant stars. Most of the resolved bright stars show colors in the range -0.1<=B-R<=+0.7.
- ID:
- ivo://CDS.VizieR/J/A+AS/142/399
- Title:
- BR surface photometry of emission-line galaxies
- Short Name:
- J/A+AS/142/399
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Detailed B and R surface photometry is performed for 139 faint emission-line galaxies (ELGs) and for 2 non-ELGs. They are a subsample of the ELG sample selected by Popescu et al. (1996A&AS..116...43P, 1998A&AS..133...13P) towards four nearby voids. We derived the isophotal and integral photometric parameters and radial surface brightness (SB) profiles. Our sample consists mostly of low luminosity (<M_B_>_med_=-17.7), small linear size (<d_25_>_med_=6.0kpc) (H_0_=75km/s/Mpc) and blue (<B-R>_med_=0.93) galaxies. About 83% of the studied ELGs belong to the class of Blue Compact Galaxies (BCGs); others are luminous Starburst Nucleus Galaxies (SBNs) and a few interacting pairs. 72% of the ELGs possess a single dominant H II region, while the remaining 28% show multiple knots. Furthermore 71% of the ELGs show regular outer isophotes, and the remaining 29% reveal disturbed outer morphologies.
- ID:
- ivo://CDS.VizieR/J/A+A/559/A29
- Title:
- BR 1202-0725 system in [CII] line
- Short Name:
- J/A+A/559/A29
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We performed a kinematical analysis of the [CII] line emission of the BR 1202-0725 system at z~4.7 using ALMA science verification observations. The most prominent sources of this system are a quasar (QSO) and a submillimeter galaxy (SMG), separated by a projected distance of about ~24kpc and characterized by very high star formation rates, higher than 1000M_{sun}_/yr. However, the ALMA observations reveal that these galaxies apparently have undisturbed rotating disks, which is at variance with the commonly accepted scenario in which strong star formation activity is induced by a major merger.We also detected faint components which, after spectral deblending, were spatially resolved from the main QSO and SMG emissions. The relative velocities and positions of these components are compatible with orbital motions within the gravitational potentials generated by the QSO host galaxy and the SMG, suggesting that they are smaller galaxies in interaction or gas clouds in accretion flows of tidal streams. Moreover, we did not find any clear spectral evidence for outflows caused by active galactic nuclei or stellar feedback. This suggests that the high star formation rates might be induced by interactions or minor mergers with these companions, which do not affect the large-scale kinematics of the disks, however. Alternatively, the strong star formation may be fueled by the accretion of pristine gas from the host halo. Our kinematical analysis also indicates that the QSO and the SMG have similar dynamical masses, mostly in the form of molecular gas, and that the QSO host galaxy and the SMG are seen close to face-on with slightly different disk inclinations: the QSO host galaxy is seen almost face-on (i~15{deg}), while the SMG is seen at higher inclinations (i~25{deg}). Finally, the ratio between the black hole mass of the QSO, obtained from new X-shooter spectroscopy, and the dynamical mass of the host galaxy is similar to value found in very massive local galaxies, suggesting that the evolution of black hole galaxy relations is probably better studied with dynamical than with stellar host galaxy masses.
- ID:
- ivo://CDS.VizieR/J/A+A/441/1195
- Title:
- Brussels nuclear reaction rate library
- Short Name:
- J/A+A/441/1195
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The present data is part of the Brussels nuclear reaction rate library (BRUSLIB) for astrophysics applications and concerns nuclear reaction rate predictions calculated within the statistical Hauser-Feshbach approximation and making use of global and coherent microscopic nuclear models for the quantities (nuclear masses, nuclear structure properties, nuclear level densities, gamma-ray strength functions, optical potentials) entering the rate calculations.
