2013A&A...549L...1R

Query : 2013A&A...549L...1R

2013A&A...549L...1R - Astronomy and Astrophysics, volume 549, L1-1 (2013/1-1)

Recent star formation in the Lupus clouds as seen by Herschel.

RYGL K.L.J., BENEDETTINI M., SCHISANO E., ELIA D., MOLINARI S., PEZZUTO S., ANDRE P., BERNARD J.P., WHITE G.J., POLYCHRONI D., BONTEMPS S., COX N.L.J., DI FRANCESCO J., FACCHINI A., FALLSCHEER C., DI GIORGIO A.M., HENNEMANN M., HILL T., KOENYVES V., MINIER V., MOTTE F., NGUYEN-LUONG Q., PERETTO N., PESTALOZZI M., SADAVOY S., SCHNEIDER N., SPINOGLIO L., TESTI L. and WARD-THOMPSON D.

Abstract (from CDS):

We present a study of the star formation histories of the LupusI, III, and IV clouds using the Herschel 70-500µm maps obtained by the Herschel Gould Belt Survey Key Project. By combining the new Herschel data with the existing Spitzer catalog we obtained an unprecedented census of prestellar sources and young stellar objects in the Lupus clouds, which allowed us to study the overall star formation rate (SFR) and efficiency (SFE). The high SFE of LupusIII, its decreasing SFR, and its large number of pre-main sequence stars with respect to proto- and prestellar sources, suggest that LupusIII is the most evolved cloud, and after having experienced a major star formation event in the past, is now approaching the end of its current star-forming cycle. LupusI is currently undergoing a large star formation event, apparent by the increasing SFR, the large number of prestellar objects with respect to more evolved objects, and the high percentage of material at high extinction (e.g., above AV≃8mag). Also LupusIV has an increasing SFR; however, the relative number of prestellar sources is much lower, suggesting that its star formation has not yet reached its peak.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - stars: protostars - ISM: individual objects: Lupus I - ISM: individual objects: Lupus III - ISM: individual objects: Lupus IV - infrared: ISM

Nomenclature: Fig.2, Fig.A.2: [RBS2013] L1-NN core N=27, [RBS2013] L1-1 YSO N=1, [RBS2013] L3-NN core N=10, [RBS2013] L3-1 YSO N=1, [RBS2013] L4-NN core N=10, [RBS2013] L4-N YSO N=3.

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 [RBS2013] L1-11 core IR 15 42 50.60 -34 13 25.4           ~ 2 0
2 Lupus 1 Cld 15 43 02.1 -34 09 06           ~ 286 0
3 NAME Lupus Complex SFR 16 03 -38.1           ~ 720 0
4 Lupus 4 MoC 16 03 12.4 -42 07 43           ~ 152 0
5 IRAS 16059-3857 Y*O 16 09 18.07 -39 04 53.4           ~ 47 0
6 Lupus 3 SFR 16 09.6 -39 03           ~ 323 0
7 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3631 1
8 LDN 1689 DNe 16 32 22.5 -24 28 29           ~ 137 0
9 NAME Gould Belt PoG ~ ~           ~ 874 1

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