2020A&A...634A..98G

Query : 2020A&A...634A..98G

2020A&A...634A..98G - Astronomy and Astrophysics, volume 634A, 98-98 (2020/2-1)

Corona-Australis DANCe. I. Revisiting the census of stars with Gaia-DR2 data.

GALLI P.A.B., BOUY H., OLIVARES J., MIRET-ROIG N., SARRO L.M., BARRADO D., BERIHUETE A. and BRANDNER W.

Abstract (from CDS):

Context. Corona-Australis is one of the nearest regions to the Sun with recent and ongoing star formation, but the current picture of its stellar (and substellar) content is not complete yet. Aims. We take advantage of the second data release of the Gaia space mission to revisit the stellar census and search for additional members of the young stellar association in Corona-Australis. Methods. We applied a probabilistic method to infer membership probabilities based on a multidimensional astrometric and photometric data set over a field of 128 deg² around the dark clouds of the region. Results. We identify 313 high-probability candidate members to the Corona-Australis association, 262 of which had never been reported as members before. Our sample of members covers the magnitude range between G≥5mag and G≤20mag, and it reveals the existence of two kinematically and spatially distinct subgroups. There is a distributed "off-cloud" population of stars located in the north of the dark clouds that is twice as numerous as the historically known "on-cloud" population that is concentrated around the densest cores. By comparing the location of the stars in the HR-diagram with evolutionary models, we show that these two populations are younger than 10Myr. Based on their infrared excess emission, we identify 28 Class II and 215 Class III stars among the sources with available infrared photometry, and we conclude that the frequency of Class II stars (i.e. "disc-bearing" stars) in the on-cloud region is twice as large as compared to the off-cloud population. The distance derived for the Corona-Australis region based on this updated census is d=149.4^+0.4_–0.4pc, which exceeds previous estimates by about 20pc. Conclusions. In this paper we provide the most complete census of stars in Corona-Australis available to date that can be confirmed with Gaia data. Furthermore, we report on the discovery of an extended and more evolved population of young stars beyond the region of the dark clouds, which was extensively surveyed in the past.

Abstract Copyright: © P. A. B. Galli et al. 2020

Journal keyword(s): open clusters and associations: individual: Corona-Australis - stars: formation - stars: distances - methods: statistical - parallaxes - proper motions

VizieR on-line data: <Available at CDS (J/A+A/634/A98): tablea1.dat tablea2.dat tablea3.dat>

Simbad objects: 328

Full paper

View the references in ADS

Number of rows : 328

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	NAME Taurus Complex	SFR	04 41.0	+25 52						~	4137	0
2	NAME Ori Complex	Cld	05 35.3	-05 23						~	411	0
3	NAME Chamaeleon Region	SFR	11 55	-78.0						~	766	0
4	NAME Lupus Complex	SFR	16 03	-38.1						~	653	0
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158	Gaia DR3 6735199698782414336	Y*O	18 45 58.7961459951	-34 47 49.103983144						~	1	0
159	Gaia DR3 6732127663290781056	Y*O	18 46 01.4998032600	-35 42 15.801967908						~	2	0
160	Gaia DR3 6735189150342584448	Y*?	18 46 10.6926741360	-34 56 39.547707468						~	2	0
161	Gaia DR3 6732107769002061312	Y*O	18 46 19.5944826888	-35 59 49.041133044						~	2	0
162	Gaia DR3 6730284469481982208	Y*O	18 46 21.1209677703	-37 19 42.887095633						~	1	0
163	Gaia DR3 6732109143391621760	Y*O	18 46 25.4895270306	-35 55 38.657910854						~	1	0
164	Gaia DR3 6730557595045553664	Y*O	18 46 25.7859014976	-36 09 12.825130068						~	2	0
165	Gaia DR3 6730281274014730368	Y*?	18 46 41.0895404376	-37 21 15.142333608						~	2	0
166	Gaia DR3 6730281274026219776	Y*?	18 46 41.1695300568	-37 21 17.605031364						~	2	0
167	Gaia DR3 6730292642798112896	Y*O	18 46 44.1001402752	-37 09 05.819045148						~	2	0
168	Gaia DR3 6730527938284896384	Y*O	18 46 45.3756684192	-36 36 21.825154512						~	2	0
169	Gaia DR3 6732122440610486912	Y*O	18 46 47.6074990344	-35 38 17.699789040						~	2	0
170	Gaia DR3 6735171077119945600	Y*O	18 46 48.9403828914	-35 09 36.192385341						~	1	0
171	Gaia DR3 6730226264083604608	Y*O	18 47 00.6621460717	-37 39 30.037605052						~	1	0
172	Gaia DR3 6735177635516522368	Y*O	18 47 06.1132413696	-35 04 48.288091872						~	2	0
173	Gaia DR3 6730232238372827392	Y*O	18 47 13.0654208280	-37 28 10.593502860						~	2	0
174	Gaia DR3 6735184443058287360	Y*O	18 47 15.3100831848	-34 52 57.536428548						~	2	0
175	Gaia DR3 6730228424440331904	Y*O	18 47 17.2897114464	-37 34 00.972797520						~	2	0
176	HD 173505	Y*O	18 47 19.0363972992	-37 32 55.235555016		7.03	7.07			B9V	15	0
177	Gaia DR3 6732043134026964224	Y*?	18 47 23.2140217872	-36 12 56.524845672						~	2	0
178	Gaia DR3 6729254016622857472	Y*O	18 47 38.5477583016	-38 51 09.296170560						~	2	0
179	Gaia DR3 6729329165673220480	Y*O	18 47 43.7021155680	-38 34 48.971928324						~	2	0
180	Gaia DR3 6730233887645446272	Y*O	18 47 45.8083068321	-37 30 59.821033876						~	1	0
181	Gaia DR3 6730241244929688960	Y*O	18 47 52.8911706360	-37 16 18.257078352						~	2	0
182	Gaia DR3 6729328753356336896	Y*O	18 47 54.5307557880	-38 34 17.846012172						~	2	0
183	Gaia DR3 6730234785298700800	Y*O	18 47 59.4531972870	-37 26 08.553419263						~	1	0
184	Gaia DR3 6729355206055074944	Y*O	18 47 59.7450066149	-38 10 58.970878522						~	1	0
185	Gaia DR3 6730221900396669952	Y*O	18 48 06.6661480512	-37 33 07.512181668						~	2	0
186	Gaia DR3 6730264678271906816	Y*O	18 48 09.5577651432	-37 14 17.037358512						~	2	0
187	Gaia DR3 6729252612175923968	Y*O	18 48 10.1383233462	-38 50 42.189783008						~	1	0
188	Gaia DR3 6732272214708936448	Y*O	18 48 12.5284392072	-34 53 40.962111432						~	2	0
189	Gaia DR3 6730224408657648000	*	18 48 18.2013554129	-37 25 30.473126223						~	1	0
190	Gaia DR3 6730265223722584320	Y*?	18 48 18.2873262240	-37 11 03.395335128						~	1	0
191	Gaia DR3 6730236705141318528	Y*O	18 48 24.6726611206	-37 22 01.084063473						~	1	0
192	Gaia DR3 6735395171334235008	Y*O	18 48 36.5317315968	-33 48 16.715595780						~	2	0
193	Gaia DR3 6732093922015431168	*	18 48 45.5479904323	-35 39 19.570535016						~	1	0
194	Gaia DR3 6730262822834357248	Y*O	18 48 50.4622120752	-37 11 58.091229600						~	2	0
195	Gaia DR3 6735794259693554304	Y*O	18 49 04.1879461656	-33 24 50.749968096						~	2	0
196	Gaia DR3 6731855912115752320	Y*O	18 49 21.3752084043	-36 14 18.349462139						~	1	0
197	Gaia DR3 6731852957178180352	Y*O	18 49 23.5455686040	-36 20 00.706377264						~	2	0
198	Gaia DR3 6731884873071695616	Y*O	18 49 37.3955458921	-36 01 13.878421959						~	1	0
199	Gaia DR3 6732082411514529024	Y*O	18 49 43.0334543976	-35 46 20.282935944						~	2	0
200	Gaia DR3 6735323118961200000	Y*O	18 49 46.3140287010	-34 13 56.759474798						~	2	0
201	Gaia DR3 6729449420453843584	Y*O	18 50 04.5804514200	-37 50 36.215411496						~	2	0
202	Gaia DR3 6729394994630895616	Y*O	18 50 06.2122051224	-38 07 30.188975268						~	2	0
203	Gaia DR3 6730252167025513984	Y*?	18 50 08.5636495224	-37 15 33.757984404						~	2	0
204	Gaia DR3 6731882845847140480	Y*O	18 50 13.5647028846	-36 00 24.922740819						~	1	0
205	Gaia DR3 6731786398058670720	Y*O	18 50 15.3087580636	-36 40 50.304256409						~	1	0
206	Gaia DR3 6732206067902438144	*	18 50 32.1357791988	-35 12 03.550582454						~	1	0
207	Gaia DR3 6731004958834262400	Y*O	18 50 44.8958675784	-37 09 24.039407664						~	2	0
208	Gaia DR3 6731894841699927552	Y*O	18 50 50.7002650056	-35 47 08.220431472						~	2	0
209	Gaia DR3 6731772070046218752	Y*O	18 51 12.4491866088	-36 43 20.121859740						~	2	0
210	Gaia DR3 6729170831698336896	Y*O	18 51 16.1091794112	-38 46 03.259491312						~	2	0
211	Gaia DR3 6731808766248601088	Y*O	18 51 22.2304074312	-36 31 43.258275948						~	2	0
212	Gaia DR3 6731815466398973824	Y*O	18 51 30.3945978864	-36 21 59.886775152						~	2	0
213	Gaia DR3 6730986473294930432	Y*O	18 51 54.1034861760	-37 22 49.045617516						~	2	0
214	Gaia DR3 6729429977144779264	Y*O	18 51 55.4407043256	-37 42 17.787167388						~	2	0
215	Gaia DR3 6731791655097086848	*	18 52 07.8840579456	-36 41 32.204491992						~	1	0
216	Gaia DR3 6731797947236370304	Y*?	18 52 12.1160050440	-36 32 17.651477976						~	2	0
217	Gaia DR3 6732025374345005184	Y*O	18 52 14.2729203432	-35 17 41.477601048						~	2	0
218	IRAS 18489-3703	TT*	18 52 17.3013456504	-37 00 11.948920920		12.7	12.194		10.842	K7V	46	0
219	Gaia DR3 6731919202752668160	Y*O	18 52 28.8828302256	-36 02 46.919694336						~	2	0
220	Gaia DR3 6731902087299776000	Y*?	18 52 52.0614442872	-36 14 23.350210260						~	1	0
221	HD 174656	**	18 53 05.977488	-36 10 22.76616		10.57	9.80	9.79	8.643	K0IV(e)	22	0
222	Gaia DR3 6731916488333198720	Y*O	18 53 07.3640429832	-36 05 16.278934092						~	2	0
223	Gaia DR3 6731051069602876800	Y*O	18 53 13.6614769728	-36 30 56.029135104						~	2	0
224	HD 174689	Y*O	18 53 24.6835533240	-37 16 27.781172292		7.41	7.38			A0V	8	0
225	Gaia DR3 6730944618831282048	*	18 53 26.4507547836	-37 16 36.518598379						~	1	0
226	Gaia DR3 6731896521018591616	Y*O	18 53 30.3494371488	-36 22 14.553368076						~	2	0
227	Gaia DR3 6730724858243386240	Y*O	18 54 18.3847857472	-37 50 32.746586651						~	1	0
228	Gaia DR3 6729141458420442112	Y*O	18 54 20.3867350944	-38 37 08.085973512						~	2	0
229	Gaia DR3 6730701321822246784	Y*O	18 54 42.5597586960	-38 11 45.591305568						~	2	0
230	Gaia DR3 6730733826136155904	Y*O	18 54 55.0861633320	-37 39 27.006972876						~	2	0
231	Gaia DR3 6717001471361208192	Y*O	18 54 57.2179078646	-39 51 18.326433167						~	1	0
232	HD 175048	Y*O	18 55 15.3140368536	-38 34 44.724238068		8.51	8.28			A5IV/V	8	0
233	Gaia DR3 6730975031500584192	Y*O	18 55 15.9891824808	-37 02 30.466186908						~	2	0
234	Gaia DR3 6730717024223786112	Y*?	18 55 22.0310437176	-37 48 05.160726828						~	2	0
235	Gaia DR3 6730960218154606464	Y*O	18 55 31.3049991732	-37 10 15.612944605						~	2	0
236	Gaia DR3 6731132708340104576	Y*O	18 55 33.7981474512	-36 29 34.981322316						~	2	0
237	Gaia DR3 6731052203472422144	Y*O	18 56 05.7376900080	-37 07 19.182437436						~	2	0
238	Gaia DR3 6730768873069264128	*	18 56 30.3811338069	-37 16 33.574354857						~	1	0
239	Gaia DR3 6730688540000272768	Y*O	18 56 33.1210825728	-37 53 59.616740364						~	2	0
240	2MASS J18564024-3655203	Y*O	18 56 40.2413627712	-36 55 20.449876296						~	5	0
241	2MASS J18564400-3545321	Y*?	18 56 44.0081249256	-35 45 32.294279232						~	5	0
242	Gaia DR3 6731563613818178304	Y*?	18 56 44.3088971184	-35 45 32.195475828						~	2	0
243	Gaia DR3 6731109618595716352	Y*O	18 56 48.6303801312	-36 26 39.752119968						~	3	0
244	Gaia DR3 6731061304500058496	Y*O	18 57 07.8638553738	-36 54 04.037162729						~	1	0
245	2MASS J18571605-3656502	Y*O	18 57 16.0537903272	-36 56 50.167596804						~	3	0
246	2MASS J18572084-3643005	TT*	18 57 20.8422617712	-36 43 00.643933128		11.77	11.16			G5IV	13	0
247	V* V3788 Sgr	Y*O	18 57 29.9956861128	-36 34 36.782988852						~	3	0
248	Gaia DR3 6732777027982641024	Y*O	18 57 32.0819469816	-33 47 35.441483136						~	2	0
249	Gaia DR3 6730670226260687232	Y*O	18 57 32.5360815888	-38 05 28.698778608						~	2	0
250	Gaia DR3 6730746985915311360	Y*?	18 57 33.9762860808	-37 32 32.642187360						~	2	0
251	2MASS J18573418-3732332	Y*?	18 57 34.2124405920	-37 32 33.226676628			14.87			~	5	1
252	RX J185802.3-365348	TT*	18 58 01.8228923880	-36 53 45.264989904		13.40	12.26	12.04		K5IV	11	0
253	Gaia DR3 6718654316514345344	Y*O	18 58 10.4139269010	-38 20 39.898005851						~	1	0
254	Gaia DR3 6730796292140202112	Y*O	18 58 17.6157968173	-37 25 52.735801984						~	1	0
255	2MASS J18584157-3651430	Y*O	18 58 41.5795590312	-36 51 43.017594480						~	4	0
256	Gaia DR3 6730906891834942592	Y*O	18 58 50.8708919904	-36 39 55.631848788						~	2	0
257	2MASS J18585650-3640297	TT*	18 58 56.5094550768	-36 40 29.723482956		13.2	12.8			~	8	0
258	Gaia DR3 6730828693373852032	Y*?	18 59 14.8238003784	-37 11 32.411552100						~	2	0
259	Gaia DR3 6730828693373851904	Y*?	18 59 14.9658468144	-37 11 30.760272132						~	2	0
260	Gaia DR3 6730890162945943552	Y*O	18 59 31.4963620872	-36 46 04.286955252						~	2	0
261	2MASS J18593179-3650261	Y*O	18 59 31.7903155680	-36 50 26.232711288						~	4	0
262	Gaia DR3 6730878682489282816	Y*O	18 59 36.8454748196	-37 00 59.049649605						~	1	0
263	Gaia DR3 6730885146424037120	Y*O	18 59 45.3552242808	-36 55 47.631683316						~	2	0
264	2MASSW J1858509-370631	Y*O	18 59 50.9461096368	-37 06 31.493373948						~	14	1
265	2MASS J19000157-3637054	TT*	19 00 01.5743588376	-36 37 05.510254656		15.19	13.93			M1V	22	0
266	2MASS J19000169-3627576	TT*	19 00 01.6918258056	-36 27 57.638827764		15.8	14.9			~	8	0
267	Gaia DR3 6730840238245942400	Y*O	19 00 31.5837446184	-36 52 13.594088604						~	2	0
268	Gaia DR3 6731263202321082112	Y*O	19 00 33.2644556160	-36 44 02.824072476						~	2	0
269	2MASS J19003930-3648121	Y*O	19 00 39.3001458672	-36 48 12.250459152		17.53	15.88			M2V	13	0
270	2MASS J19004455-3702108	Y*O	19 00 44.5539857712	-37 02 10.826549412						~	9	0
271	2MASS J19005804-3645048	Y*O	19 00 58.0437180672	-36 45 04.885017840				13.57		M0.75	13	0
272	2MASS J19005974-3647109	Y*O	19 00 59.7440317608	-36 47 11.070032568						~	11	0
273	HD 176269	Y*O	19 01 03.2540527320	-37 03 39.303126756		6.54	6.69			B9V	64	0
274	2MASS J19010460-3701292	Y*O	19 01 04.6080393960	-37 01 29.284737816						M4	9	0
275	2MASS J19010971-3647528	TT*	19 01 09.7113657912	-36 47 52.880980812		14.35	12.74	12.0		~	15	0
276	2MASS J19011149-3645337	Y*O	19 01 11.4977880672	-36 45 33.826238352		20.1		18.067	15.779	~	6	0
277	V* V667 CrA	Or*	19 01 16.2871007376	-36 56 28.277849904						M5	17	0
278	Gaia DR3 6731275129451843840	Y*O	19 01 17.5812803520	-36 26 43.654107840						~	2	0
279	2MASS J19011893-3658282	Y*O	19 01 18.9402669744	-36 58 28.245913644				18.4		M4.5	19	0
280	2MASS J19012083-3703027	Y*O	19 01 20.8420768896	-37 03 02.766814272						M5	14	0
281	2MASS J19012562-3704535	Y*O	19 01 25.6336969968	-37 04 53.583994740						M5.0~	11	0
282	2MASS J19012717-3659085	TT*	19 01 27.1758555480	-36 59 08.597796900		18.3	16.9			M	17	0
283	GSC 07421-02198	Y*O	19 01 28.7317755864	-36 59 31.793030484					13.15	M1.0	15	0
284	2MASS J19012901-3701484	Y*O	19 01 29.0328872976	-37 01 48.513865908						M3.75	20	0
285	2MASS J19013357-3700304	Y*O	19 01 33.5761986624	-37 00 30.453110028						M6.5	45	0
286	V* V709 CrA	Or*	19 01 34.8589591776	-37 00 56.579123412		12.70	11.03			K1IV	62	0
287	Gaia DR3 6731274785854399104	Y*?	19 01 38.0788691544	-36 26 15.559825488						~	2	0
288	HD 176386	Y*O	19 01 38.9318002416	-36 53 26.561166432	7.28	7.44	7.32	8.11		B9V	130	0
289	2MASS J19014055-3644320	TT*	19 01 40.56	-36 44 32.0						M0	8	0
290	V* TY CrA	Ae*	19 01 40.8284458320	-36 52 33.816176040	10.03	9.92	9.39			B9e	279	0
291	2MASS J19014164-3659528	Y*O	19 01 41.6426330712	-36 59 52.868573844		17.7	16.7			M2	29	0
292	Gaia DR3 6718694586124956160	Y*O	19 01 46.9020565824	-38 13 26.922852552						~	2	0
293	UCAC4 265-183516	Y*O	19 01 49.3660476264	-37 00 28.636309008		18.4		16.6		M4.0	13	0
294	Gaia DR3 6731220703626866944	Y*O	19 01 50.3908385856	-36 40 22.697640552						~	2	0
295	2MASS J19015180-3710478	Y*O	19 01 51.8159405760	-37 10 47.959912056				16.451	14.500	~	8	0
296	Gaia DR3 6731326600340226176	Y*O	19 01 52.7053460328	-35 53 41.520996312						~	2	0
297	V* R CrA	Ae*	19 01 53.6764322232	-36 57 08.299341828	12.781	12.651	11.917	11.242	10.412	B5IIIpe	472	1
298	2MASS J19015374-3700339	Y*O	19 01 53.7537206544	-37 00 34.050751956						M8.5	19	2
299	NAME Coronet Cluster	Cl*	19 01 54	-36 57.2						~	88	1
300	V* T CrA	Ae*	19 01 58.7902764120	-36 57 50.339720880			11.67			F0	162	0
301	2MASS J19020012-3702220	TT*	19 02 00.1219249728	-37 02 22.132961880		17.0	16.1			M4	16	0
302	Gaia DR3 6731219535395752704	Y*O	19 02 00.8702118559	-36 44 09.075690409						~	1	0
303	V* V702 CrA	Or*	19 02 01.9776932592	-37 07 43.519646568		11.28	10.512		9.512	G5e	42	0
304	HD 176497	Y*O	19 02 06.7921159752	-36 21 41.856281856		8.52	8.35			A0IV	13	0
305	2MASS J19020768-3711557	Y*O	19 02 07.6935338400	-37 11 55.831877664				19.615	17.022	~	4	0
306	2MASS J19020968-3646345	Y*O	19 02 09.6773570184	-36 46 34.470837156		18.6		16.8		M4	9	0
307	2MASS J19021201-3703093	Y*O	19 02 12.0189397320	-37 03 09.420563916						M4.5	19	0
308	2MASS J19021667-3645493	Y*O	19 02 16.6800450216	-36 45 49.377696696						M4	15	0
309	2MASS J19022213-3655409	TT*	19 02 22.1300594952	-36 55 40.964075976		15.17	13.72	12.5		K2IV	39	0
310	2MASS J19022244-3655385	Y*O	19 02 22.4441826312	-36 55 38.594217000		15.4	13.9			~	9	0
311	Gaia DR3 6718801651070440832	Y*O	19 02 23.5869539100	-37 23 35.623880602						~	1	0
312	UCAC4 276-200903	Y*O	19 02 26.8634240856	-34 49 30.206223624				13.539		~	2	0
313	Gaia DR3 6731245648796025472	Y*O	19 02 29.7433993008	-36 34 50.352781152						~	2	0
314	2MASS J19023813-3634321	Y*O	19 02 38.1369599952	-36 34 32.152846872						~	3	0
315	2MASS J19023940-3653111	Y*O	19 02 39.4075028568	-36 53 11.219771220				17.928	15.654	~	4	0
316	Gaia DR3 6719167341762656640	Y*O	19 03 06.3699905040	-37 16 40.963827612						~	2	0
317	ISO-CrA 194	Y*O	19 03 06.8233982212	-37 05 16.572110423						~	2	0
318	2MASS J19031185-3709020	Y*O	19 03 11.851	-37 09 02.02				16.82		M5.0	8	0
319	2MASS J19032547-3655051	Y*O	19 03 25.4794487976	-36 55 05.208519036						~	8	0
320	Gaia DR3 6731237917854733824	Y*O	19 03 52.0584247752	-36 30 23.838507324						~	2	0
321	2MASS J19040795-3702476	Y*O	19 04 07.9519861056	-37 02 47.634887508		15.74	14.15			~	6	0
322	Gaia DR3 6719216128293613312	Y*O	19 04 10.0163660664	-36 46 04.370545596						~	2	0
323	HD 177076	Y*O	19 04 44.4144452256	-36 50 40.971078168		8.28	8.12			A0V	23	0
324	Gaia DR3 6719129924007616640	Y*O	19 05 31.8945414264	-37 23 05.395575768						~	2	0
325	HD 177386	Y*O	19 05 56.7406617456	-36 11 46.414954680		9.01	8.50			F3IV/V	14	0
326	V* V721 CrA	Or*	19 09 45.9196932624	-37 04 26.179922172		14.92	13.30			K6IVe	27	0
327	CD-38 13398	TT*	19 17 23.8181700744	-37 56 50.448912972		11.02	10.074		8.913	K0IVe	21	0
328	NAME Upper CrA	As*	~	~						~	14	0

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