J/ApJS/269/59 Low-surface-brightness galaxy cand. from SDSS DR16 (Xing+, 2023)
Edge-on low-surface-brightness galaxy candidates detected from SDSS images using
YOLO.
Xing Y., Yi Z., Liang Z., Su H., Du W., He M., Liu M., Kong X., Bu Y.,
Wu H.
<Astrophys. J. Suppl. Ser., 269, 59 (2023)>
=2023ApJS..269...59X 2023ApJS..269...59X
ADC_Keywords: Galaxy catalogs; Optical
Keywords: Low surface brightness galaxies ; Astronomical object identification ;
Astronomy data analysis
Abstract:
Low-surface-brightness galaxies (LSBGs), fainter members of the galaxy
population, are thought to be numerous. However, due to their low
surface brightness, the search for a wide-area sample of LSBGs is
difficult, which in turn limits our ability to fully understand the
formation and evolution of galaxies as well as galaxy relationships.
Edge-on LSBGs, due to their unique orientation, offer an excellent
opportunity to study galaxy structure and galaxy components. In this
work, we utilize the You Only Look Once (YOLO) object detection
algorithm to construct an edge-on LSBG detection model by training on
281 edge-on LSBGs in Sloan Digital Sky Survey (SDSS) gri-band
composite images. This model achieved a recall of 94.64% and a purity
of 95.38% on the test set. We searched across 938,046 gri-band images
from SDSS Data Release 16 and found 52,293 candidate LSBGs. To enhance
the purity of the candidate LSBGs and reduce contamination, we
employed the Deep Support Vector Data Description algorithm to
identify anomalies within the candidate samples. Ultimately, we
compiled a catalog containing 40,759 edge-on LSBG candidates. This
sample has similar characteristics to the training data set, mainly
composed of blue edge-on LSBG candidates.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 38 40759 Catalog of candidate LSBGs detected in SDSS DR16
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See also:
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
VII/219 : Revised Flat Galaxy Catalogue (RFGC) (Karachentsev+, 1999)
V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)
J/A+A/459/679 : RB photometry of LSBG in Coma (Adami+, 2006)
J/ApJ/787/24 : Structural param. of true edge-on galaxies (Bizyaev+, 2014)
J/MNRAS/465/3784 : Very thin discs galaxies properties (Bizyaev+, 2017)
J/ApJ/857/104 : Low surface brightness galaxies from HSC-SSP (Greco+, 2018)
J/ApJS/248/33 : Edge-on HI-rich LSB galaxies from ALFALFA (He+, 2020)
J/ApJS/252/18 : Low-surface-brightness gal. from DES Y3 (Tanoglidis+, 2021)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000)
12- 21 F10.6 deg DEdeg [-23.5/85] Declination in decimal degrees (J2000)
23- 28 F6.4 --- Conf [0.65/0.9] Model-predicted confidence
30- 36 F7.4 --- Anomaly [0.014/11.3] Anomaly score (1)
38- 38 I1 --- Flag [0/1]? Position flag (2)
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Note (1): The distance between each data point and the center of the
hypersphere is calculated, known as the anomaly score, and if the
anomaly score is greater than a threshold, the data point is
considered an anomaly. The equation for calculating the anomaly score
is as:
s(x)=||φ(x;w*)-c||2
where x represents the test data, w* represents the network
parameters of a trained one-class classification model, φ(x;w*)
represents the network representations, and c represents the center of
the hypersphere. See Section 4.3.
Note (2): Position flag as follows:
0 = Position from SDSS (40,558 occurrences)
1 = Position from model (201 occurrences)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 15-Feb-2024