38:
1602:
651:
Dalcanton, J. J.; Williams, B. F.; Seth, A. C.; Dolphin, A.; Holtzman, J.; Rosema, K.; Skillman, E. D.; Cole, A.; Girardi, L. O.; Gogarten, S. M.; Karachentsev, I. D.; Olsen, K.; Weisz, D.; Christensen, C.; Freeman, K.; Gilbert, K.; Gallart, C.; Harris, J.; Hodge, P.; De Jong, R. S.; Karachentseva,
279:
during a survey of the northern sky. They for the first time resolved it into stars and determined the distance to it—1.15 Mpc (the modern distance estimate is slightly larger). The same year, Antonio
Aparicio, Julianne Dalcanton, Carme Gallart and David Martinez-Delgado studied for the first
417:
The Antlia Dwarf and NGC 3109 may be actually physically bound if the distance between them is not very large. However their velocity relative to each other—43 km/s makes it questionable whether they are in fact a bound system, especially if the distance between them is closer to the upper
341:, while its total mass (within the visible radius) is approximately 4 × 10 solar masses. The galaxy contains stars of all ages but is dominated by old stars with the age of more than 10 billion year. There seems to have been a major episode of
251:
of galaxies. The galaxy contains stars of all ages, contains significant amounts of gas, and has experienced recent star formation. The Antlia Dwarf is believed to be tidally interacting with the small
271:, and A. de Vaucouleurs. Later in 1985 and 1987, it was noted as a possible nearby dwarf galaxy by two groups of astronomers. It was finally confirmed as a dwarf galaxy in 1997 by Alan Whiting,
315:(dSph) or as a transitional galaxy from spheroidal to irregular types (dSph/Irr). The last classification is due to a substantial star formation in this galaxy in the last 0.1 billion years.
612:
Piersimoni, A. M.; Piersimoni, A. M.; Bono, G.; Castellani, M.; Marconi, G.; Cassisi, S.; Buonanno, R.; Nonino, M. (December 1999). "A new investigation on the Antlia Dwarf Galaxy".
498:
Aparicio, Antonio; Dalcanton, J. J.; Gallart, C.; Martinez-Delgado, D. (October 1997). "The Nature of the Antlia Galaxy: A New Dwarf
Irregular in the Outskirts of the Local Group".
705:
Tully, R. B.; Rizzi, L.; Dolphin, A. E.; Karachentsev, I. D.; Karachentseva, V. E.; Makarov, D. I.; Makarova, L.; Sakai, S.; Shaya, E. J. (2006). "Associations of Dwarf
Galaxies".
330:, which makes measuring its distance relatively easy. The total luminosity of Antlia Dwarf is approximately 1 million times that of the Sun (the visible absolute magnitude is M
1634:
425:
that is traveling at the same velocity as the gas in the Antlia Dwarf, indicating that the two galaxies had a close encounter about one billion years ago.
390:
and is a member of a separate group of dwarf galaxies called Antlia-Sextans Group. The Antlia Dwarf is separated from the small spiral/irregular galaxy
946:
Sarajedini, Ata; Claver, C. F.; Ostheimer, James C. Jnr.; Ostheimer, James C. (December 1997). "The properties of the Antlia Dwarf Galaxy".
308:
166:
1624:
1011:
Barnes, D. G.; W. J. G. de Blok (August 2001). "On the
Neutral Gas Content and Environment of NGC 3109 and the Antlia Dwarf Galaxy".
992:
652:
V.; Mateo, M.; Stetson, P. B.; Tavarez, M.; Zaritsky, D.; Governato, F.; Quinn, T. (2009). "The Acs Nearby Galaxy Survey
Treasury".
1139:
818:
Whiting, Alan B.; Irwin, M. J.; Hau, George K. T. (September 1997). "A new galaxy in the Local Group: The Antlia Dwarf Galaxy".
345:
in the Antlia Dwarf around 100 million years ago. However, the young stars are confined to the central core of the galaxy.
322:
is very low, at about <>=−1.6 to −1.9 meaning that Antlia Dwarf contains 40–80 times less heavy elements than the
214:
982:
886:"Antlia Dwarf Galaxy: Distance, quantitative morphology and recent formation history via statistical field correction"
758:
Grebel, Eva K.; Gallagher, John S. III; Harbeck, Daniel (April 2003). "The
Progenitors of Dwarf Spheroidal Galaxies".
614:
1639:
418:
limit—180 kpc. If they are gravitationally bound, their total mass may be as high as 78 billion solar masses.
1231:
318:
Antlia Dwarf comprises two components: a core and an old halo. Its half-light radius is about 0.25 kpc. The
1013:
820:
500:
268:
1159:
348:
Antlia Dwarf is unusual among dwarf spheroidal galaxies in that it contains large amounts (as much as 7 ×10
312:
304:
228:
37:
1367:
1148:
110:
43:
1455:
1279:
1132:
1099:
1032:
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907:
839:
777:
724:
671:
633:
573:
509:
288:
284:
253:
248:
140:
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897:
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829:
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623:
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563:
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by only 1.18 degrees on the sky, which corresponds to a physical separation of 29 kiloparsecs (95
147:
1401:
276:
1178:
988:
55:
1112:
1040:
963:
915:
847:
785:
732:
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of the Local Group is about 1.7 Mpc. At this distance, it is situated well outside the
327:
232:
194:
1629:
1605:
1196:
1125:
75:
1036:
959:
911:
843:
781:
728:
675:
577:
513:
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1572:
342:
135:
1107:
1618:
1216:
1206:
1201:
1191:
1186:
929:
920:
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683:
593:
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63:
1052:
797:
1221:
859:
691:
131:
1211:
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87:
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1269:
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1103:
383:
349:
338:
272:
236:
182:
1544:
1424:
1254:
1249:
1244:
1239:
421:
Observations have also demonstrated that NGC 3109 has a warp in its gaseous
280:
time its stellar content and measured its mass, luminosity and metallicity.
20:
1117:
1528:
1523:
1518:
1513:
1508:
1503:
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240:
52:
337:
The stellar mass of Antlia Dwarf is estimated to be about 2–4×10
1169:
176:
1121:
323:
554:
Van Den Bergh, S. (1999). "The
Nearest Group of Galaxies".
267:
The Antlia Dwarf was first cataloged in 1985 by H. Corwin,
360:
and does not actively form stars at the present moment.
368:
The Antlia Dwarf is located about 1.31 megaparsecs (4.3
941:
939:
247:. It is the fourth and faintest member of the nearby
607:
605:
603:
326:. The galaxy has a well-defined and easily observed
1571:
1537:
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1445:
1423:
1389:
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1177:
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62:
50:
30:
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491:
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487:
485:
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477:
475:
303:The Antlia Dwarf is classified alternatively as a
890:Monthly Notices of the Royal Astronomical Society
813:
811:
809:
807:
549:
547:
545:
543:
541:
539:
537:
535:
533:
531:
414: ly) depending on their radial separation.
1006:
1004:
879:
877:
875:
873:
871:
869:
1133:
8:
283:In 1999, the Antlia Dwarf was identified by
654:The Astrophysical Journal Supplement Series
1568:
1451:
1420:
1174:
1140:
1126:
1118:
235:. It lies about 1.3 Mpc (4.3 million
36:
1026:
919:
901:
833:
771:
718:
665:
627:
567:
987:. University of Cambridge. p. 266.
198:
151:
433:
356:. However it does not have significant
92:−27° 19′ 55″
884:Pimbblet, K. A.; Couch, W. J. (2011).
291:—the group of galaxies closest to the
27:
449:
447:
445:
443:
441:
439:
437:
378: ly) away, in the constellation
7:
1635:Principal Galaxies Catalogue objects
1113:Antlia Dwarf at Constellation Guide
455:"NASA/IPAC Extragalactic Database"
16:Galaxy in the constellation Antlia
14:
404: ly) to 180 kiloparsecs (590
1601:
1600:
921:10.1111/j.1365-2966.2011.19769.x
984:The galaxies of the Local Group
981:van den Bergh, Sidney (2000).
1:
615:Astronomy & Astrophysics
287:as the fourth member of the
1656:
684:10.1088/0067-0049/183/1/67
18:
1625:Dwarf elliptical galaxies
1598:
1567:
1419:
1155:
556:The Astrophysical Journal
364:Location and interactions
212:
35:
1014:The Astronomical Journal
948:The Astronomical Journal
821:The Astronomical Journal
760:The Astronomical Journal
707:The Astronomical Journal
501:The Astronomical Journal
459:Results for Antlia Dwarf
382:. Its distance from the
19:Not to be confused with
1160:List of stars in Antlia
1149:Constellation of Antlia
638:1999A&A...352L..63P
313:dwarf spheroidal galaxy
305:dwarf elliptical galaxy
181:3 × 10
44:Hubble Space Telescope
269:Gérard de Vaucouleurs
243:in the constellation
213:Antlia Dwarf Galaxy,
1070:The Antlia Dwarf on
352:) of neutral atomic
289:Antlia-Sextans Group
285:Sidney van den Bergh
254:barred spiral galaxy
249:Antlia-Sextans Group
171:dE3.5 dSph, dSph/Irr
141:Antlia-Sextans Group
1108:Articles and images
1037:2001AJ....122..825B
960:1997AJ....114.2505S
912:2012MNRAS.419.1153P
844:1997AJ....114..996W
782:2003AJ....125.1926G
729:2006AJ....132..729T
676:2009ApJS..183...67D
578:1999ApJ...517L..97V
514:1997AJ....114.1447A
208:Other designations
148:Apparent magnitude
51:Observation data (
1640:NGC 3109 subgroup
1612:
1611:
1594:
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1563:
1562:
1441:
1440:
1415:
1414:
311:, or either as a
221:
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1135:
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1057:
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1030:
1028:astro-ph/0107474
1008:
999:
998:
978:
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954:(6): 2505–2513.
943:
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881:
864:
863:
837:
835:astro-ph/9706173
815:
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773:astro-ph/0301025
766:(4): 1926–1939.
755:
749:
748:
722:
720:astro-ph/0603380
702:
696:
695:
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629:astro-ph/9909198
609:
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569:astro-ph/9904425
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525:
508:(4): 1447–1457.
495:
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410:
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399:
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373:
328:red giant branch
233:irregular galaxy
229:dwarf spheroidal
102:362 ± 0 km/
82:
42:Antlia Dwarf by
40:
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1573:Galaxy clusters
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1397:2MASS 0939−2448
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1381:93083 (Macondo)
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161:Characteristics
125:
124:1.29 ± 0.02 Mpc
123:
122:1.31 ± 0.03 Mpc
121:
120:1.33 ± 0.10 Mpc
119:
80:
76:Right ascension
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24:
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5:
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1586:NGC 2997 Group
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1581:Antlia Cluster
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1063:External links
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1045:10.1086/321170
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968:10.1086/118663
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865:
852:10.1086/118530
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790:10.1086/368363
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737:10.1086/505466
713:(2): 729–748.
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586:10.1086/312044
562:(2): L97–L99.
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522:10.1086/118575
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195:Apparent size
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64:Constellation
61:
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29:
26:
22:
1550:Antlia Dwarf
1549:
1018:
1012:
983:
976:
951:
947:
893:
889:
825:
819:
763:
759:
753:
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462:. Retrieved
458:
420:
416:
411:
401:
375:
367:
358:H II regions
350:solar masses
347:
339:solar masses
336:
317:
302:
282:
266:
225:Antlia Dwarf
224:
222:
156:15.67 ± 0.02
115:1.32 ± 0.06
31:Antlia Dwarf
25:
896:(2): 1153.
622:: L63–L68.
464:30 November
388:Local Group
320:metallicity
293:Local Group
237:light-years
203:2′.0 × 1′.5
88:Declination
1619:Categories
1433:HD 93083 b
1425:Exoplanets
1100:Astrophoto
1092:Hydrogen α
1021:(2): 825.
429:References
384:barycenter
309:type dE3.5
299:Properties
277:George Hau
273:Mike Irwin
81:10 04 03.9
1545:Antlia II
930:106400803
903:1109.1142
745:119505770
667:0905.3737
594:119338768
334:=−10.3).
263:Discovery
21:Antlia II
1606:Category
1447:Galaxies
1232:Variable
1053:15734118
798:18496644
392:NGC 3109
354:hydrogen
257:NGC 3109
187:☉
126:1.25 Mpc
111:Distance
98:Redshift
1555:IC 2560
1407:WASP-66
1104:Sky Map
1072:WikiSky
1033:Bibcode
956:Bibcode
908:Bibcode
860:8218571
840:Bibcode
778:Bibcode
725:Bibcode
692:5032304
672:Bibcode
634:Bibcode
574:Bibcode
510:Bibcode
239:) from
136:cluster
1630:Antlia
1051:
991:
928:
858:
796:
743:
690:
592:
380:Antlia
245:Antlia
197:
150:
69:Antlia
1538:Other
1390:Other
1376:88522
1179:Bayer
1170:Stars
1096:X-Ray
1084:GALEX
1049:S2CID
1023:arXiv
926:S2CID
898:arXiv
856:S2CID
830:arXiv
794:S2CID
768:arXiv
741:S2CID
715:arXiv
688:S2CID
662:arXiv
624:arXiv
590:S2CID
564:arXiv
241:Earth
227:is a
217:29194
132:Group
56:epoch
53:J2000
1529:3281
1524:3271
1519:3269
1514:3268
1509:3267
1504:3260
1499:3258
1494:3244
1489:3223
1484:3175
1479:3125
1474:3087
1469:3001
1464:2997
1358:4313
1353:4238
1348:4194
1343:4183
1338:4086
1333:4019
1328:4015
1323:3992
1318:3932
1313:3916
1308:3833
1303:3830
1298:3812
1293:3790
1288:3770
1088:IRAS
1080:SDSS
1076:DSS2
989:ISBN
466:2006
423:disk
275:and
223:The
177:Mass
167:Type
1456:NGC
1041:doi
1019:122
964:doi
952:114
916:doi
894:419
848:doi
826:114
786:doi
764:125
733:doi
711:132
680:doi
658:183
620:352
582:doi
560:517
518:doi
506:114
324:Sun
307:of
215:PGC
199:(V)
152:(V)
134:or
117:Mpc
1621::
1368:HD
1280:HR
1270:BF
1265:AG
1260:UX
1106:,
1102:,
1098:,
1094:,
1090:,
1086:,
1082:,
1078:,
1074::
1047:.
1039:.
1031:.
1017:.
1003:^
962:.
950:.
938:^
924:.
914:.
906:.
892:.
888:.
868:^
854:.
846:.
838:.
824:.
806:^
792:.
784:.
776:.
762:.
739:.
731:.
723:.
709:.
686:.
678:.
670:.
656:.
632:.
618:.
602:^
588:.
580:.
572:.
558:.
530:^
516:.
504:.
474:^
457:.
436:^
408:10
398:10
372:10
295:.
259:.
1255:V
1250:U
1245:T
1240:S
1222:ι
1217:θ
1212:η
1207:ζ
1202:ζ
1197:ε
1192:δ
1187:α
1141:e
1134:t
1127:v
1055:.
1043::
1035::
1025::
997:.
970:.
966::
958::
932:.
918::
910::
900::
862:.
850::
842::
832::
800:.
788::
780::
770::
747:.
735::
727::
717::
694:.
682::
674::
664::
640:.
636::
626::
596:.
584::
576::
566::
524:.
520::
512::
468:.
412:^
406:×
402:^
396:×
376:^
370:×
332:V
231:/
184:M
104:s
58:)
23:.
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