2023ApJ...943...93M

Query : 2023ApJ...943...93M

2023ApJ...943...93M - Astrophys. J., 943, 93 (2023/February-1)

Searches for Extremely Metal-poor Galaxies Using Arecibo Legacy Fast ALFA-Selected Dwarf Galaxies.

MILLER J.H.Jr, SALZER J.J., JANOWIECKI S., HAYNES M.P. and HIRSCHAUER A.S.

Abstract (from CDS):

We present a study of nearby dwarf galaxies selected from the Arecibo Legacy Fast ALFA (ALFALFA) blind H I survey. A primary goal of the project was to utilize a nonstandard selection method with the hope of detecting previously unrecognized extremely metal-poor (XMP) galaxies. The study was motivated by the recent discovery of two XMP galaxies, Leo P and Leoncino, which were both originally found via the ALFALFA survey. We have obtained narrowband Hα images for 42 dwarf systems, many of which are located in the Local Void in front of the Pisces-Perseus Supercluster. Spectra for 11 of the best candidates resulted in the determination of metal abundances for 10 of the systems. None were found to be extremely metal-poor, although one system (AGC 123350) was found to have an oxygen abundance of log(O/H)+12 = 7.46, or ∼6% solar. One of the galaxies in our sample exhibits a high oxygen abundance for its luminosity, suggesting the possibility that it may have a tidal origin.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Dwarf irregular galaxies - Metallicity - Galaxy spectroscopy - Galaxy chemical evolution - Star forming regions - Galaxy abundances - Starburst galaxies - H I line emission - Star formation

Simbad objects: 45

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Number of rows : 45
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 AGC 104295 G 00 03 59.400 +34 38 18.02           ~ 2 0
2 LEDA 1662401 G 00 41 29.3 +22 02 33           ~ 5 0
3 AGC 102857 G 00 48 24.199 +31 34 27.01           ~ 2 0
4 LEDA 1687095 G 00 48 59.8896313776 +23 25 22.094699844           ~ 5 0
5 AGC 102968 LSB 00 49 27.799 +28 21 19.01           ~ 3 0
6 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
7 MAPS-CD P295-823940 G 00 54 39.84 +31 59 34.1           ~ 3 0
8 AGC 102973 G 00 55 58.601 +29 00 15.98           ~ 2 0
9 AGC 102859 G 00 59 18.300 +30 35 33.00           ~ 2 0
10 AGC 114082 G 01 40 58.999 +30 04 40.01           ~ 2 0
11 AGC 113863 G 01 43 37.999 +26 00 15.98           ~ 2 0
12 AGC 115320 LSB 01 48 50.5005005232 +22 06 41.476542624           ~ 3 0
13 AGC 113305 G 01 53 51.11520 +26 15 48.9348           ~ 3 0
14 AGC 123069 G 02 02 34.500 +31 15 56.99           ~ 2 0
15 AGC 124021 G 02 04 25.800 +22 10 10.99           ~ 2 0
16 AGC 123182 G 02 09 40.702 +28 55 34.00           ~ 2 0
17 AGC 123239 G 02 16 50.599 +29 19 32.02           ~ 2 0
18 AGC 123191 G 02 19 26.501 +29 42 31.00           ~ 2 0
19 AGC 122933 G 02 19 52.200 +24 17 49.99           ~ 2 0
20 AGC 123087 G 02 21 35.700 +31 34 25.00           ~ 2 0
21 AGC 123089 G 02 23 47.299 +30 18 45.00           ~ 2 0
22 AGC 123350 G 02 27 10.601 +26 38 20.00           ~ 2 0
23 AGC 122939 G 02 27 13.200 +23 57 39.02           ~ 2 0
24 AGC 124040 G 02 28 28.102 +22 13 55.02           ~ 2 0
25 Z 483-69 AG? 02 29 54.020 +25 15 23.08   15.3       ~ 67 0
26 NAME Psc-Per Supercluster SCG 02 33.2 +41 37           ~ 444 1
27 AGC 123200 G 02 35 21.600 +29 26 49.99           ~ 2 0
28 AGC 123099 G 02 45 33.300 +31 21 20.02           ~ 2 0
29 AGC 123101 G 02 58 54.300 +30 34 03.00           ~ 2 0
30 AGC 124773 G 02 59 12.000 +34 59 29.00           ~ 2 0
31 AGC 123213 G 02 59 15.300 +28 32 57.98           ~ 2 0
32 AGC 131439 rG 03 00 38.71 +25 47 01.3           ~ 8 0
33 NAME Leoncino Dwarf Galaxy bCG 09 43 32.356 +33 26 57.65           ~ 58 0
34 NAME Leo P BiC 10 21 45.123 +18 05 16.89           ~ 268 0
35 NAME Local Void vid 18 38 +18.0           ~ 234 0
36 AGC 322064 G 22 26 01.704 +22 54 20.02           ~ 2 0
37 AGC 333446 G 23 06 02.496 +31 07 16.00           ~ 2 0
38 AGC 333330 G 23 18 10.104 +25 50 01.00           ~ 2 0
39 AGC 334540 G 23 19 29.496 +22 31 28.02           ~ 2 0
40 AGC 332921 AG? 23 21 40.70 +27 51 29.0           ~ 4 0
41 AGC 333336 G 23 34 22.416 +25 32 31.02           ~ 2 0
42 AGC 333337 G 23 38 53.400 +24 13 54.01           ~ 2 0
43 AGC 333466 G 23 39 21.408 +31 42 05.00           ~ 2 0
44 AGC 334580 G 23 44 55.008 +23 39 51.01           ~ 2 0
45 AGC 334595 G 23 57 11.808 +22 21 33.01           ~ 2 0

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