The galaxies in our sample have been selected from several exploratory studies including the Markarian lists (Mrk - Markarian, Lipovetskii, & Stepanian 1981), Second Byurakan (SBS - Markarian, Stepanian, & Erastova 1986), University of Michigan (UM - MacAlpine & Williams 1981), Palomar Objective-prism X (POX - Kunth, Sargent, & Kowal 1981), Hamburg/SAO (HS - Ugryumov et al. 1999), Universidad Complutense de Madrid (UCM - Zamorano et al. 1994, 1996; Alonso et al. 1999), and Tololo (Tol - Smith, Aguirre, & Zemelan 1976) surveys, as well as the lists of Zwicky & Zwicky (1971), and Haro (1956). Mrk and SBS galaxies were originally selected by their ultraviolet excess on photographic plates taken with the objective-prism tecnique. POX, HS, UM, UCM, & Tol galaxies were discovered by the presence of emission lines, [OIII]5007Å (UM, HS, & Tol), H (UCM), or both (POX), in objective-prism spectra. Finally, galaxies in the lists of Zwicky & Zwicky (1971) and Haro (1956) were selected according to their compactness and blue colors as inferred from photographic plates taken through 3 different filters (blue, red, & infrared).
From the list of BCD galaxies discovered in these surveys we have selected objects with heliocentric recession velocities lower than 4000 km s-1. This limit was set by the longest-wavelength H filter (PO 6640) available within the Palomar Observatory narrow-band filters set. Our sample also includes the six Virgo Cluster BCDs analyzed by Popescu et al. (2002) and the highly obscured Local Group galaxy IC 10. Although this latter galaxy has been ordinarily classified as a dwarf irregular, the recent study of Richer et al. (2001) shows that its structural properties resemble more those of BCD galaxies (see Papaderos et al. 1996a). Our final sample consists of 114 galaxies.
It is worth mentioning that this sample does not include all the galaxies classified as BCDs in those surveys (noteworthy missing objects are UM 461, UM 462, or UM 465). Our sample cannot either be considered a complete sample since it has been selected from surveys that used different techniques and, therefore, are affected by different selection criteria.
In Table 1 we summarize the basic properties of the galaxies in this Atlas. In the few cases where the distance to the galaxy had been determined by measuring the magnitude of the tip of the RGB we adopted the distance value given by this method (see Lee, Freedman, & Madore 1993). In the vast majority of the cases we computed the distance using the Galactic Standard of Rest velocity of the galaxies assuming a Hubble constant of 70 km s-1Mpc-1 (Freedman et al. 2001). Distances to the galaxies in the Virgo Cluster were adopted to be 16Mpc (Macri et al. 1999). For 49 galaxies with published data the [NII]6584 Å / H line ratios required to correct the H fluxes measured from the [NII] 6548,6584 Å doublet contamination were taken from Guseva, Izotov, & Thuan (2000), Izotov & Thuan (1999), Terlevich et al. (1991), Kennicutt (1992), Vílchez (1995), Masegosa, Moles, & Campos-Aguilar (1994), Kobulnicky & Skillman (1998), Kniazev et al. (2001), van Zee et al. (1998a), Hunter & Hoffman (1999), Steel et al. (1996), Vacca & Conti (1992), Thuan, Izotov, & Lipovetsky (1995), Popescu & Hopp (2000), Garnett (1990), Thuan, Izotov, & Foltz (1999), Jansen et al. (2000), Rego et al. (1998), and Augarde et al. (1990). In those cases where the [NII]6584 Å / H line ratio was not available we adopted an average value of 0.055 computed using the 49 galaxies in our sample that do have [NII]6584 Å / H data. For comparison the average value obtained by Hunter & Hoffman (1999) for the BCDs in their sample was 0.091.
Equatorial coordinates, Galactic extinction (AB) and heliocentric radial velocity values for the sample were taken from NED (see Table 1). Galactic extinction data are derived from the 100µm maps of Schlegel, Finkbeiner, & Davis (1998). The values obtained are typically smaller than AB = 0.5 mag, except for IC 10 (6.2 mag), II 40 (3.5mag), and NGC 2915 (1.2 mag). In the case of IC 10 the very low Galactic latitude makes the foreground extinction correction very uncertain.
Object Name | RA2000 | DEC2000 | AB | vhelio | H | H filter | Distance | [NII] / H |
(h m s) | ° ' ") | (mag) | (km/s) | (Å) | (Mpc) | |||
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) |
IC 10 (1) | 00 20 17.3 | +59 18 14 | 6.16 | -348 | 6555.2 | PO 6563 | 1.0 | 0.045 |
HS 0029+1748 | 00 32 03.1 | +18 04 46 | 0.57 | 2188 | 6610.7 | PO 6614 | 33.3 | 0.055: |
Haro 14 | 00 45 46.4 | -15 35 49 | 0.09 | 944 | 6583.5 | PO 6584 | 14.0 | 0.093 |
UM 285 | 00 51 58.8 | -01 40 18 | 0.24 | 1900 | 6604.4 | PO 6601 | 28.2 | 0.055: |
UCM 0049-0045 | 00 51 59.6 | -00 29 12 | 0.17 | 1633 | 6598.5 | PO 6593 | 24.4 | 0.055: |
UM 323 | 01 26 46.6 | -00 38 46 | 0.13 | 1923 | 6604.9 | PO 6601 | 28.3 | 0.055: |
Mrk 996 | 01 27 35.5 | -06 19 36 | 0.19 | 1622 | 6598.3 | PO 6593 | 23.7 | 0.057 |
UM 133 | 01 44 41.3 | +04 53 26 | 0.16 | 1623 | 6598.3 | PO 6593 | 24.1 | 0.055: |
UM 382 | 01 58 09.4 | -00 06 38 | 0.12 | 3526 | 6639.9 | PO 6640 | 50.9 | 0.055: |
UM 404 | 02 10 12.2 | -01 24 49 | 0.15 | 3598 | 6641.6 | PO 6640 | 51.8 | 0.055: |
KUG 0207-016A | 02 10 09.8 | -01 24 03 | 0.15 | 3523 | 6639.9 | PO 6640 | 50.7 | 0.055: |
UM 408 | 02 11 23.5 | +02 20 31 | 0.15 | 3598 | 6641.6 | PO 6640 | 51.9 | 0.039 |
UM 417 | 02 19 30.3 | -00 59 13 | 0.14 | 2698 | 6621.9 | PO 6614 | 38.9 | 0.055: |
Mrk 370 | 02 40 29.0 | +19 17 50 | 0.40 | 790 | 6580.1 | PO 6584 | 12.2 | 0.055: |
Mrk 600 | 02 51 04.6 | +04 27 14 | 0.28 | 1008 | 6584.9 | PO 6584 | 14.6 | 0.025 |
NGC 1522 | 04 06 07.7 | -52 40 09 | 0.06 | 905 | 6582.6 | LC 6570 | 10.6 | 0.055: |
NGC 1705 (2) | 04 54 13.7 | -53 21 41 | 0.04 | 628 | 6576.5 | LC 6570 | 5.1 | 0.055: |
II Zw 33 | 05 10 48.1 | -02 43 00 | 0.45 | 2850 | 6625.2 | PO 6624 | 39.4 | 0.070 |
II Zw 33B | 05 10 45.2 | -02 45 31 | 0.44 | 2870 | 6625.6 | PO 6624 | 39.7 | 0.055: |
II Zw 40 | 05 55 42.8 | +03 23 30 | 3.54 | 789 | 6580.1 | PO 6584 | 9.8 | 0.024 |
Tol 0610-387 | 06 12 13.7 | -38 46 26 | 0.33 | 1799 | 6602.2 | LC 6600 | 22.8 | 0.055: |
Mrk 0005 | 06 42 15.5 | +75 37 33 | 0.36 | 792 | 6580.1 | PO 6584 | 13.2 | 0.058 |
Mrk 0007 | 07 28 12.0 | +72 34 29 | 0.13 | 3060 | 6629.8 | PO 6624 | 45.4 | 0.055: |
Mrk 86 (3) | 08 13 14.7 | +45 59 26 | 0.23 | 447 | 6572.6 | PO 6570 | 6.9 | 0.154 |
HS 0822+3542 | 08 25 55.4 | +35 32 32 | 0.20 | 732 | 6578.8 | PO 6584 | 10.1 | 0.005 |
UGC 4483 (4) | 08 37 03.0 | +69 46 50 | 0.15 | 178 | 6566.7 | PO 6563 | 3.2 | 0.055: |
UGC 4703N1 | 08 58 29.8 | +06 19 17 | 0.30 | 3551 | 6640.5 | LC 6630 | 48.8 | 0.151 |
UGC 4703N2 | 08 58 27.4 | +06 20 06 | 0.29 | 3536 | 6640.2 | LC 6630 | 48.6 | 0.151 |
Mrk 1416 | 09 20 56.2 | +52 34 05 | 0.07 | 2326 | 6613.7 | PO 6614 | 33.8 | 0.055: |
Mrk 108 | 09 21 30.3 | +64 14 20 | 0.24 | 1534 | 6596.4 | PO 6593 | 21.8 | 0.032 |
Mrk 400 | 09 26 01.2 | +19 23 01 | 0.15 | 2522 | 6618.0 | PO 6614 | 34.8 | 0.055: |
NGC 2915 (5) | 09 26 11.5 | -76 37 36 | 1.18 | 468 | 6573.0 | LC 6570 | 3.6 | 0.055: |
I Zw 18 (6) | 09 34 02.0 | +55 14 28 | 0.14 | 751 | 6579.2 | PO 6584 | 12.6 | 0.016 |
Mrk 1418 | 09 40 27.1 | +48 20 15 | 0.10 | 773 | 6579.7 | PO 6584 | 11.4 | 0.055: |
Mrk 1423 | 09 43 01.6 | +58 58 25 | 0.07 | 1358 | 6592.5 | PO 6593 | 20.4 | 0.055: |
SBS 0940+544C | 09 44 16.7 | +54 11 33 | 0.05 | 1638 | 6598.7 | PO 6593 | 24.1 | 0.006 |
Mrk 709 | 09 49 18.0 | +16 52 46 | 0.15 | 1197 | 6589.0 | PO 6593 | 15.7 | 0.098 |
Mrk 1426 | 09 49 18.3 | +48 33 50 | 0.06 | 1835 | 6602.9 | PO 6601 | 26.6 | 0.055: |
UGCA 184 | 09 49 30.4 | +55 34 49 | 0.04 | 1551 | 6596.8 | PO 6593 | 23.0 | 0.023 |
Mrk 409 | 09 49 41.2 | +32 13 16 | 0.07 | 1527 | 6596.2 | PO 6593 | 21.3 | 0.055: |
Tol 001 | 09 56 14.9 | -29 36 21 | 0.40 | 1839 | 6603.0 | LC 6600 | 23.2 | 0.055: |
Tol 002 | 09 59 20.7 | -28 07 54 | 0.40 | 710 | 6578.3 | LC 6570 | 7.1 | 0.047 |
NGC 3125 | 10 06 33.6 | -29 56 09 | 0.33 | 865 | 6581.7 | LC 6570 | 9.3 | 0.030 |
SBS 1006+578 | 10 09 55.0 | +57 36 00 | 0.04 | 1512 | 6595.9 | PO 6593 | 22.5 | 0.055: |
Haro 2 | 10 32 31.9 | +54 24 03 | 0.05 | 1461 | 6594.8 | PO 6593 | 21.6 | 0.220 |
Mrk 1434 | 10 34 10.1 | +58 03 49 | 0.03 | 2269 | 6612.5 | PO 6614 | 33.4 | 0.055: |
Haro 3 | 10 45 22.4 | +55 57 37 | 0.03 | 944 | 6583.5 | PO 6584 | 14.4 | 0.063 |
SBS 1054+504 | 10 56 58.7 | +50 08 26 | 0.07 | 1358 | 6592.5 | PO 6593 | 20.1 | 0.055: |
Haro 4 | 11 04 58.5 | +29 08 22 | 0.13 | 646 | 6576.9 | PO 6570 | 8.8 | 0.018 |
VII Zw 403 (7) | 11 27 59.9 | +78 59 39 | 0.16 | -100 | 6560.6 | PO 6563 | 4.8 | 0.055: |
Mrk 178 (8) | 11 33 29.1 | +49 14 17 | 0.08 | 249 | 6568.3 | PO 6563 | 4.2 | 0.021 |
UM 439 | 11 36 36.9 | +00 49 01 | 0.11 | 1099 | 6586.8 | PO 6584 | 14.0 | 0.015 |
Mrk 1450 | 11 38 35.6 | +57 52 27 | 0.04 | 946 | 6583.5 | PO 6584 | 14.7 | 0.025 |
UM 452 | 11 47 00.7 | -00 17 39 | 0.14 | 1478 | 6595.1 | PO 6593 | 19.5 | 0.100 |
SBS 1147+520 | 11 49 54.4 | +51 44 11 | 0.10 | 1257 | 6590.3 | PO 6593 | 18.9 | 0.055: |
Tol 17 | 11 50 03.0 | -28 40 17 | 0.33 | 2099 | 6608.7 | LC 6600 | 27.4 | 0.050 |
UM 455 | 11 50 23.7 | -00 31 43 | 0.11 | 3863 | 6647.3 | LC 6630 | 53.6 | 0.055: |
UM 456 | 11 50 36.2 | -00 34 02 | 0.12 | 1757 | 6601.2 | LC 6600 | 23.5 | 0.055: |
UM 456A | 11 50 34.0 | -00 32 16 | 0.12 | 1831 | 6602.9 | LC 6600 | 24.5 | 0.055: |
Pox 4 | 11 51 11.6 | -20 36 02 | 0.17 | 3589 | 6641.3 | LC 6630 | 48.9 | 0.014 |
ESO 572-G025 | 11 57 28.0 | -19 37 27 | 0.21 | 1781 | 6601.8 | LC 6600 | 23.1 | 0.055: |
VCC 0001 (9) | 12 08 20.3 | +13 41 03 | 0.14 | 2267 | 6612.4 | PO 6614 | 16.0 | 0.055: |
Mrk 1313 | 12 12 14.7 | +00 04 20 | 0.11 | 2328 | 6613.8 | PO 6614 | 31.8 | 0.030 |
VCC 0130 (9) | 12 15 04.0 | +09 45 13 | 0.07 | 2189 | 6610.7 | LC 6600 | 16.0 | 0.055: |
Haro 8 (9) | 12 19 09.9 | +03 51 21 | 0.07 | 1526 | 6596.2 | PO 6593 | 16.0 | 0.055: |
UM 491 | 12 19 53.1 | +01 46 24 | 0.10 | 2025 | 6607.1 | PO 6601 | 27.6 | 0.055: |
ISZ 399 | 12 19 59.5 | -17 23 31 | 0.25 | 900 | 6582.5 | LC 6570 | 10.8 | 0.055: |
VCC 0459 (9) | 12 21 11.2 | +17 38 18 | 0.15 | 2107 | 6608.9 | LC 6600 | 16.0 | 0.055: |
VCC 0655 (9) | 12 23 37.5 | +17 32 27 | 0.15 | 1142 | 6587.8 | LC 6600 | 16.0 | 0.055: |
Tol 65 | 12 25 46.9 | -36 14 01 | 0.32 | 2698 | 6621.8 | LC 6630 | 36.0 | 0.007 |
VCC 0848 (9) | 12 25 52.5 | +05 48 33 | 0.10 | 1537 | 6596.4 | LC 6600 | 16.0 | 0.055: |
Mrk 209 (10) | 12 26 16.0 | +48 29 37 | 0.06 | 281 | 6569.0 | PO 6563 | 5.8 | 0.010 |
Mrk 1329 (9) | 12 37 03.0 | +06 55 36 | 0.10 | 1632 | 6598.5 | PO 6593 | 16.0 | 0.026 |
UGCA 290 (11) | 12 37 21.8 | +38 44 38 | 0.06 | 445 | 6572.5 | PO 6570 | 6.7 | 0.055: |
VCC 1750 (9) | 12 38 15.5 | +06 59 39 | 0.09 | -117 | 6560.2 | LC 6570 | 16.0 | 0.055: |
Haro 9 | 12 45 17.1 | +27 07 32 | 0.06 | 1069 | 6586.2 | PO 6584 | 15.3 | 0.220 |
NGC 4861 | 12 59 01.8 | +34 51 40 | 0.04 | 847 | 6581.3 | PO 6584 | 12.6 | 0.042 |
UM 533 | 12 59 58.1 | +02 02 59 | 0.11 | 886 | 6582.2 | PO 6584 | 11.7 | 0.055: |
Mrk 450 | 13 14 48.3 | +34 52 51 | 0.06 | 863 | 6581.7 | PO 6584 | 13.0 | 0.038 |
NGC 5058 | 13 16 52.3 | +12 32 55 | 0.13 | 961 | 6583.8 | PO 6584 | 13.4 | 0.055: |
PGC 046448 | 13 19 22.2 | -15 09 24 | 0.28 | 2832 | 6624.8 | LC 6630 | 38.9 | 0.055: |
Pox 186 | 13 25 48.6 | -11 36 38 | 0.20 | 1170 | 6588.4 | LC 6600 | 15.4 | 0.055: |
Tol 35 | 13 27 06.5 | -27 57 24 | 0.23 | 2023 | 6607.1 | LC 6600 | 27.0 | 0.038 |
SBS 1331+493 | 13 33 22.9 | +49 06 06 | 0.04 | 599 | 6575.9 | PO 6570 | 9.9 | 0.037 |
Tol 85 | 13 37 08.2 | -32 55 28 | 0.23 | 3598 | 6641.5 | LC 6630 | 49.4 | 0.055: |
Mrk 67 | 13 41 56.5 | +30 31 10 | 0.08 | 958 | 6583.8 | PO 6584 | 14.3 | 0.019 |
Mrk 1480 | 13 42 51.8 | +52 42 31 | 0.05 | 1798 | 6602.2 | PO 6601 | 27.2 | 0.055: |
Mrk 1481 | 13 42 59.3 | +52 41 18 | 0.04 | 1803 | 6602.3 | PO 6601 | 27.3 | 0.055: |
Tol 1345-420 | 13 48 22.2 | -42 21 15 | 0.43 | 2398 | 6615.3 | LC 6600 | 32.1 | 0.018 |
HS 1400+3927 | 14 02 36.1 | +39 13 13 | 0.06 | 1396 | 6593.4 | PO 6593 | 21.1 | 0.055: |
SBS 1415+437 | 14 17 01.7 | +43 30 13 | 0.04 | 609 | 6576.1 | PO 6570 | 10.1 | 0.013 |
SBS 1428+457 | 14 30 12.2 | +45 32 32 | 0.05 | 2360 | 6614.5 | PO 6614 | 35.3 | 0.055: |
Tol 1434+032 | 14 37 19.4 | +03 03 01 | 0.15 | 1499 | 6595.6 | PO 6593 | 21.4 | 0.055: |
Mrk 475 | 14 39 05.4 | +36 48 21 | 0.05 | 583 | 6575.6 | PO 6570 | 9.7 | 0.055: |
HS 1440+4302 | 14 42 15.9 | +42 49 48 | 0.06 | 2548 | 6618.6 | PO 6614 | 38.0 | 0.038 |
HS 1442+4250 | 14 44 12.1 | +42 37 37 | 0.06 | 749 | 6579.2 | PO 6584 | 12.3 | 0.055: |
UCM 1446+2312 | 14 48 45.2 | +22 59 34 | 0.14 | 2398 | 6615.3 | PO 6614 | 35.2 | 0.055: |
Tol 1448+116 | 14 50 22.7 | +11 24 11 | 0.10 | 1870 | 6603.7 | PO 6601 | 27.2 | 0.055: |
II Zw 70 | 14 50 56.5 | +35 34 18 | 0.05 | 1215 | 6589.4 | PO 6593 | 18.7 | 0.048 |
II Zw 71 | 14 51 14.4 | +35 32 31 | 0.06 | 1292 | 6591.1 | PO 6593 | 18.7 | 0.114 |
I Zw 115 | 15 32 57.0 | +46 27 07 | 0.06 | 656 | 6577.2 | PO 6570 | 11.4 | 0.055: |
SBS 1533+574 | 15 34 13.8 | +57 17 06 | 0.06 | 3310 | 6635.3 | PO 6640 | 49.6 | 0.055: |
I Zw 123 | 15 37 04.2 | +55 15 48 | 0.06 | 665 | 6577.4 | PO 6570 | 11.7 | 0.033 |
HS 1609+4827 | 16 11 11.5 | +48 20 04 | 0.06 | 2817 | 6624.5 | PO 6624 | 42.6 | 0.055: |
UCM 1612+1308 | 16 15 17.1 | +13 01 32 | 0.21 | 3630 | 6642.3 | PO 6640 | 53.2 | 0.026 |
UGCA 412 | 16 35 21.1 | +52 12 53 | 0.12 | 2700 | 6621.9 | PO 6624 | 41.1 | 0.055: |
HS 1704+4332 | 17 05 45.4 | +43 28 49 | 0.13 | 2076 | 6608.2 | PO 6614 | 32.2 | 0.055: |
NGC 6789 (12) | 19 16 41.9 | +63 58 18 | 0.30 | -141 | 6559.7 | PO 6563 | 3.6 | 0.055: |
Tol 1924-416 | 19 27 58.2 | -41 34 32 | 0.38 | 2874 | 6625.7 | LC 6630 | 41.0 | 0.024 |
Tol 1937-423 | 19 40 58.1 | -42 15 44 | 0.34 | 2698 | 6621.8 | LC 6630 | 41.8 | 0.055: |
Mrk 900 | 21 29 59.6 | +02 24 51 | 0.24 | 1152 | 6588.0 | PO 6584 | 18.8 | 0.131 |
Mrk 314 | 23 02 59.2 | +16 36 19 | 0.38 | 2081 | 6608.4 | PO 6614 | 32.2 | 0.055: |
Mrk 324 | 23 26 32.8 | +18 15 59 | 0.22 | 1600 | 6597.8 | PO 6593 | 25.3 | 0.051 |
Mrk 328 | 23 37 39.6 | +30 07 47 | 0.40 | 1379 | 6593.0 | PO 6593 | 22.4 | 0.221 |
Note. - Columns stand for: (1) Galaxy name. (2) Right Ascension (J2000) in (h m s). (3) Declination (J2000) in (° ' "). (4) B-band Galactic extinction in magnitudes (Schelegel et al. 1998). (5) Heliocentric radial velocity in kms-1 (taken from NED). (6) Observed wavelength for H (Å). (7) Filter used for the H-line imaging. (8) Distance (Mpc). (9) [NII]6584Å / H intensity ratio. Values of 0.055: are estimated values only, adopted from the average of 49 other galaxies in the sample. |
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References. - For non-redshift distances: (1) Hunter (2001); (2) Tosi et al. (2001); (3) Sharina, Karachentsev, & Tikhonov (1999); (4) Dolphin et al. (2001); (5) Meurer et al. (1996); (6) Östlin (2000); (7) Schulte-Ladbeck et al. (1999); (8) Schulte-Ladbeck et al. (2000); (9) Virgo cluster (Macri et al. 1999); (10) Schulte-Ladbeck et al. (2001); (11) Crone et al. (2000); (12) Drozdovsky et al. (2001). |