Pre-main sequence Star Candidate

A pre-main-sequence star (also known as a PMS star and PMS object) is a star in the stage when it has not yet reached the main sequence. Earlier in its life, the object is a protostar that grows by acquiring mass from its surrounding envelope of interstellar dust and gas. After the protostar blows away this envelope, it is optically visible, and appears on the stellar birthline in the Hertzsprung-Russell diagram. At this point, the star has acquired nearly all of its mass but has not yet started hydrogen burning (i.e. nuclear fusion of hydrogen). The star then contracts, its internal temperature rising until it begins hydrogen burning on the zero age main sequence. This period of contraction is the pre-main sequence stage. An observed PMS object can either be a T Tauri star, if it has fewer than 2 solar masses (M☉), or else a Herbig Ae/Be star, if it has 2 to 8 M☉. Yet more massive stars have no pre-main-sequence stage because they contract too quickly as protostars. By the time they become visible, the hydrogen in their centers is already fusing and they are main-sequence objects.

Uses material from the Wikipedia article "Pre-main sequence Star Candidate", which is released under the Creative Commons BY-SA 3.0.
Astronomical object DistanceWiki
2MASS J05334918-0523023T Tau star CandidateM1251
2MASS J05341377-0500041T Tau star Candidate1268
2MASS J05341387-0536353T Tau star CandidateM1287
2MASS J05342743-0500263T Tau star Candidate1335
2MASS J05343276-0458467T Tau star Candidate1338
2MASS J05345373-0505489T Tau star Candidate1331
2MASS J05350303-0459597T Tau star Candidate1321
2MASS J05362100-0527340T Tau star CandidateK1252
2MASS J10354048-5813410Pre-main sequence Star Candidate7610
2MASS J10354231-5813561Pre-main sequence Star Candidate7501
2MASS J10360045-5814550Pre-main sequence Star Candidate7506
2MASS J11123235-6049477Pre-main sequence Star Candidate5375
2MASS J11124465-6049311Pre-main sequence Star Candidate5363
2MASS J11125299-6050229Pre-main sequence Star Candidate5344
2MASS J11125503-6048389Pre-main sequence Star Candidate5303
2MASS J11130226-6053162Pre-main sequence Star Candidate5308
2MASS J11130574-6052594Pre-main sequence Star Candidate5400
2MASS J11130805-6047190Pre-main sequence Star Candidate5342
2MASS J11130908-6048024Pre-main sequence Star Candidate5378
2MASS J11130920-6049433Pre-main sequence Star Candidate5324
2MASS J11131302-6046029Pre-main sequence Star Candidate5306
2MASS J11131429-6050135Pre-main sequence Star Candidate5314
2MASS J11131624-6047179Pre-main sequence Star Candidate5348
2MASS J11131717-6049595Pre-main sequence Star Candidate5307
2MASS J11131895-6047118Pre-main sequence Star Candidate5384
2MASS J11132002-6046329Pre-main sequence Star Candidate5384
2MASS J11132692-6049255Pre-main sequence Star Candidate5327
2MASS J11132923-6047409Pre-main sequence Star Candidate5383
2MASS J11133615-6048239Pre-main sequence Star Candidate5375
AA OrionisT Tau star CandidateK1342
AG OrionisT Tau star CandidateG1345
AO OrionisT Tau star Candidate1339
AR OrionisT Tau star Candidate1339
CE OrionisT Tau star CandidateK1347
Haro 4-411T Tau star Candidate1254
HD 25373T Tau star CandidateK1250
HIP 14809T Tau star CandidateG175
HIP 19762T Tau star CandidateK313
HIP 21251T Tau star CandidateB438
II OrionisT Tau star CandidateK1288
IM OrionisT Tau star CandidateM1334
IS OrionisT Tau star CandidateK1322
IV OrionisT Tau star CandidateK1304
IX OrionisT Tau star CandidateK1331
IZ OrionisT Tau star Candidate1307
JW 222T Tau star CandidateM1270
KP OrionisT Tau star Candidate1251
KR OrionisT Tau star CandidateK1305
LM OrionisT Tau star CandidateK1271
LO OrionisT Tau star CandidateM1295
LP 356-14T Tau star CandidateM63
LW OrionisT Tau star CandidateM1316
LX OrionisT Tau star Candidate1316
MM OrionisT Tau star CandidateK1311
MY OrionisT Tau star CandidateM1313
MZ OrionisT Tau star CandidateM1278
NY OrionisT Tau star CandidateG1300
OQ OrionisT Tau star CandidateK1326
OT OrionisT Tau star CandidateK1329
OW OrionisT Tau star CandidateM1295
OX OrionisT Tau star CandidateM1259
T OrionisT Tau star CandidateA1319
TV OrionisT Tau star CandidateK1277
V1017 OrionisT Tau star CandidateM1306
V1018 OrionisT Tau star CandidateM1301
V1044 OrionisT Tau star CandidateG1281
V1118 OrionisT Tau star CandidateM1253
V1314 OrionisT Tau star CandidateG1298
V1345 OrionisT Tau star CandidateM1283
V1348 OrionisT Tau star CandidateK1266
V1397 OrionisT Tau star CandidateK1305
V1433 OrionisT Tau star CandidateM1253
V1460 OrionisT Tau star CandidateM1262
V1461 OrionisT Tau star CandidateM1307
V1572 OrionisT Tau star Candidate1282
V1578 OrionisT Tau star Candidate1307
V1590 OrionisT Tau star CandidateM1288
V1721 OrionisT Tau star CandidateM1281
V1724 OrionisT Tau star CandidateM1330
V1897 OrionisT Tau star Candidate1256
V1944 OrionisT Tau star CandidateM1286
V1988 OrionisT Tau star CandidateM1322
V2004 OrionisT Tau star Candidate1255
V2010 OrionisT Tau star Candidate1255
V2012 OrionisT Tau star CandidateM1256
V2033 OrionisT Tau star CandidateM1315
V2057 OrionisT Tau star CandidateK1255
V2064 OrionisT Tau star CandidateM1342
V2123 OrionisT Tau star CandidateM1336
V2129 OrionisT Tau star CandidateM1342
V2151 OrionisT Tau star CandidateK1251
V2228 OrionisT Tau star CandidateM1252
V2267 OrionisT Tau star Candidate1263
V2277 OrionisT Tau star CandidateM1250
V2347 OrionisT Tau star CandidateM1321
V2366 OrionisT Tau star Candidate1278
V2446 OrionisT Tau star Candidate1283
V2447 OrionisT Tau star Candidate1291
V2485 OrionisT Tau star CandidateM1304
V2499 OrionisT Tau star CandidateK1262
V2543 OrionisT Tau star CandidateM1298
V2548 OrionisT Tau star CandidateM1294
V2551 OrionisT Tau star CandidateM1314
V2554 OrionisT Tau star CandidateM1268
V2573 OrionisT Tau star CandidateK1281
V357 OrionisT Tau star CandidateM1274
V360 OrionisT Tau star CandidateM1275
V401 OrionisT Tau star CandidateK1337
V405 OrionisT Tau star CandidateM1299
V409 OrionisT Tau star CandidateK1267
V426 OrionisT Tau star CandidateK1299
V474 OrionisT Tau star CandidateK1344
V488 OrionisT Tau star CandidateG1282
V551 OrionisT Tau star CandidateM1283
V553 OrionisT Tau star Candidate1295
V575 OrionisT Tau star Candidate1322
V745 OrionisT Tau star CandidateM1255
V808 OrionisT Tau star CandidateK1258
V848 OrionisT Tau star Candidate1255
WW OrionisT Tau star Candidate1336
WY OrionisT Tau star CandidateM1341
WZ OrionisT Tau star CandidateK1275
XY OrionisT Tau star Candidate1285
YZ OrionisT Tau star CandidateG1287
ZZ OrionisT Tau star Candidate1305