- ID:
- ivo://CDS.VizieR/J/AJ/127/704
- Title:
- Low surface brightness galaxies in SDSS
- Short Name:
- J/AJ/127/704
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In this paper we present results of a pilot study to use imaging data from the Sloan Digital Sky Survey (SDSS) to search for low surface brightness (LSB) galaxies. For our pilot study we use a test sample of 92 galaxies from the Impey et al. catalog distributed over 93 SDSS fields of the Early Data Release (EDR, <J/AJ/123/567>). Many galaxies from the test sample are either LSB or dwarf galaxies. To deal with the SDSS data most effectively, a new photometry software was created, which is described in this paper. We present the results of the selection algorithms applied to these 93 EDR fields. Two galaxies from the Impey et al. (1996, <J/ApJS/105/209>) test sample are very likely artifacts, as confirmed by follow-up imaging. With our algorithms we were able to recover 87 of the 90 remaining test sample galaxies, implying a detection rate of ~96.5%. The three missed galaxies fall too close to very bright stars or galaxies. In addition, 42 new galaxies with parameters similar to the test sample objects were found in these EDR fields (i.e.,~47% additional galaxies). We present the main photometric parameters of all identified galaxies and carry out first statistical comparisons. We tested the quality of our photometry by comparing the magnitudes for our test sample galaxies and other bright galaxies with values from the literature. All these tests yielded consistent results. We briefly discuss a few unusual galaxies found in our pilot study, including an LSB galaxy with a two-component disk and 10 new giant LSB galaxies.
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Search Results
- ID:
- ivo://CDS.VizieR/J/ApJS/105/209
- Title:
- Low surface brightness galaxies. I. The catalog
- Short Name:
- J/ApJS/105/209
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Data are presented for 693 galaxies identified in a large new survey for low surface brightness galaxies in the nearby universe (z<=0.1). The survey covers 786 square degrees centered on the equator, and it extends significantly the surface brightness range of galaxy surveys in which there are a substantial number of galaxies with redshifts. The data are derived from the Automated Plate Measuring machine scans of survey plates from the UK Schmidt Telescope and from follow-up observations at radio and optical wavelengths. Accurate positions, total B magnitudes, surface brightness parameters, and angular size are tabulated for each galaxy. Radial velocities, optical luminosities, and neutral hydrogen masses are listed for a subset of the sample. Finding charts are also presented for those objects having a large enough angular size that the scans from survey plates provide some morphological information. The selection function and the luminosity function that can be derived from the survey are discussed in two companion papers.
2033. LRG catalog
- ID:
- ivo://CDS.VizieR/J/MNRAS/380/1608
- Title:
- LRG catalog
- Short Name:
- J/MNRAS/380/1608
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In this work I discuss the necessary steps for deriving photometric redshifts for luminous red galaxies (LRGs) and galaxy clusters through simple empirical methods. The data used are from the Sloan Digital Sky Survey (SDSS). I show that with three bands only (gri) it is possible to achieve results as accurate as the ones obtained by other techniques, generally based on more filters. In particular, the use of the (g-i) colour helps improving the final redshifts (especially for clusters), as this colour monotonically increases up to z~0.8. For the LRGs I generate a catalogue of ~1.5 million objects at z<0.70. The accuracy of this catalogue is sigma=0.027 for z<=0.55 and sigma=0.049 for 0.55<z<=0.70. The photometric redshift technique employed for clusters is independent of a cluster selection algorithm. Thus, it can be applied to systems selected by any method or wavelength, as long as the proper optical photometry is available. When comparing the redshift listed in literature to the photometric estimate, the accuracy achieved for clusters is sigma=0.024 for z<=0.30 and sigma=0.037 for 0.30<z<=0.55. However, when considering the spectroscopic redshift as the mean value of SDSS galaxies on each cluster region, the accuracy is at the same level as found by other authors: sigma=0.011 for z<=0.30 and sigma=0.016 for 0.30<z<=0.55. The photometric redshift relation derived here is applied to thousands of cluster candidates selected elsewhere. I have also used galaxy photometric redshifts available in SDSS to identify groups in redshift space and then compare the redshift peak of the nearest group to each cluster redshift. This procedure provides an alternative approach for cluster selection, especially at high redshifts, as the cluster red sequence may be poorly defined.
- ID:
- ivo://CDS.VizieR/J/A+A/405/99
- Title:
- LSB galaxies in near-infrared. I.
- Short Name:
- J/A+A/405/99
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A sample of about 3800 Low Surface Brightness (LSB) galaxies was selected using the all-sky near-infrared (J, H and Ks-band) 2MASS survey. The selected objects have a mean central surface brightness within a 5" radius around their centre fainter than 18mag/arcsec^2^ in the Ks band, making them the lowest surface brightness galaxies detected by 2MASS. A description is given of the relevant properties of the 2MASS survey and the LSB galaxy selection procedure, as well as of basic photometric properties of the selected objects. The latter properties are compared to those of other samples of galaxies, of both LSBs and "classical'' high surface brightness (HSB) objects, which were selected in the optical. The 2MASS LSBs have a B_Tc_-K_T_ colour colour which is on average 0.9mag bluer than that of HSBs from the NGC. The 2MASS sample does not appear to contain a significant population of red objects.
- ID:
- ivo://CDS.VizieR/J/A+A/408/67
- Title:
- LSB galaxies in near-infrared. II.
- Short Name:
- J/A+A/408/67
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A total of 367 Low Surface Brightness galaxies detected in the 2MASS all-sky near-infrared survey have been observed in the 21 cm H I line using the Arecibo telescope. All have a Ks-band mean central surface brightness, measured within a 5" radius, fainter than 18mag/arcsec^2^. We present global H I line parameters for the 107 clearly detected objects and the 21 marginal detections, as well as upper limits for the undetected objects. The 107 clear detections comprise 15 previously uncatalogued objects and 36 with a PGC entry only.
- ID:
- ivo://CDS.VizieR/J/A+A/408/465
- Title:
- LSB galaxies in near-infrared. III.
- Short Name:
- J/A+A/408/465
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A total of 334 Low Surface Brightness galaxies detected in the 2MASS all-sky near-infrared survey have been observed in the 21 cm H I line using the Nancay telescope. All have a Ks-band mean central surface brightness, measured within a 5" radius, fainter than 18mag/arcsec^2^ and a Ks-band isophotal radius at the 20mag/arcsec^2^ level larger than 20". We present global H I line parameters for the 171 clearly detected objects and the 23 marginal detections, as well as upper limits for the undetected objects. The 171 clear detections comprise 50 previously uncatalogued objects and 41 objects with a PGC entry only.
- ID:
- ivo://CDS.VizieR/J/A+A/385/816
- Title:
- LSB galaxies rotation curves
- Short Name:
- J/A+A/385/816
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- File rawcurve contains the raw rotation curves of the low surface brightness galaxies. These data are not corrected for inclination. File procurve contains the processed rotation curves that can be directly used for mass modelling.
2038. LSBG catalogue
- ID:
- ivo://CDS.VizieR/J/MNRAS/304/297
- Title:
- LSBG catalogue
- Short Name:
- J/MNRAS/304/297
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have developed an automatic technique to search for low-surface-brightness (LSB) galaxies in the local Universe (v<=5000km/s) using the automated plate measuring (APM) scan data of UK Schmidt photographic plates. We optimized our technique and selection criteria by surveying the known LSB galaxies in the Fornax cluster. Plate-to-plate magnitude calibrations were carried out using independent CCD sequences. The galaxies we detected are brighter than 20Bmag, have scalesizes greater than 3arcsec and a central surface brightness fainter than 22.5mag/arcsec^2^. In total 2435 LSB galaxies were detected over a total area of 2187deg^2^. The survey covers the Fornax cluster, NGC 1400, Sculptor and Dorado groups and the field between. We detect on average 32 LSB galaxies per 5.8{deg}x5.8{deg} field. We have estimated the background (v>5000km/s) contamination in three ways: by numerical modelling, using a limited redshift sample and comparing our Fornax data with those of Ferguson. The results indicate a contamination of about 19 galaxies per field.
- ID:
- ivo://CDS.VizieR/J/MNRAS/476/4488
- Title:
- LSBG HI and optical properties
- Short Name:
- J/MNRAS/476/4488
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a study of the HI and optical properties of nearby (z<=0.1) Low Surface Brightness galaxies (LSBGs). We started with a literature sample of ~900 LSBGs and divided them into three morphological classes: spirals, irregulars, and dwarfs. Of these, we could use ~490 LSBGs to study their HI and stellar masses, colours, and colour-magnitude diagrams, and local environment, compare them with normal, High Surface Brightness (HSB) galaxies and determine the differences between the three morphological classes. We found that LSB and HSB galaxies span a similar range in HI and stellar masses, and have a similar M_HI_/M_{star}_-M_{star}_ relationship. Among the LSBGs, as expected, the spirals have the highest average HI and stellar masses, both of about 10^9.8^M_{sun}_. The LSGBs' (g-r) integrated colour is nearly constant as function of HI mass for all classes. In the colour-magnitude diagram, the spirals are spread over the red and blue regions whereas the irregulars and dwarfs are confined to the blue region. The spirals also exhibit a steeper slope in the M_HI_/M_{star}_-M_{star}_ plane. Within their local environment, we confirmed that LSBGs are more isolated than HSB galaxies, and LSB spirals more isolated than irregulars and dwarfs. Kolmogorov-Smirnov statistical tests on the HI mass, stellar mass, and number of neighbours indicate that the spirals are a statistically different population from the dwarfs and irregulars. This suggests that the spirals may have different formation and HI evolution than the dwarfs and irregulars.
- ID:
- ivo://CDS.VizieR/J/A+A/458/341
- Title:
- LSBG in Arecibo HI Strip Survey
- Short Name:
- J/A+A/458/341
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In order to estimate the contribution of low surface brightness (LSB) galaxies to the local (z<=0.1) galaxy number density, we performed an optical search for LSB candidates in a 15.5{deg}^2^ part of the region covered by the 65{deg}^2^ blind Arecibo HI Strip Survey (AHISS)
