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Titolo:
Sub-arcsec resolution near-infrared images of the Cederblad 110 region
Autore:
Persi, P; Marenzi, AR; Gomez, M; Olofsson, G;
Indirizzi:
CNR, Ist Astrofis Spaziale, Area Ric Tor Vergata, I-00133 Rome, Italy CNRRome Italy I-00133 aziale, Area Ric Tor Vergata, I-00133 Rome, Italy Observ Astron, RA-5000 Cordoba, Argentina Observ Astron Cordoba Argentina RA-5000 tron, RA-5000 Cordoba, Argentina Stockholm Observ, S-13336 Saltsjobaden, Sweden Stockholm Observ Saltsjobaden Sweden S-13336 -13336 Saltsjobaden, Sweden
Titolo Testata:
ASTRONOMY & ASTROPHYSICS
fascicolo: 3, volume: 376, anno: 2001,
pagine: 907 - 916
SICI:
1432-0746(200109)376:3<907:SRNIOT>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
I DARK CLOUD; CHAMELEON-I; YOUNG STELLAR; ISOCAM OBSERVATIONS; INTRINSIC COLORS; OBJECTS; STARS; DUST; PHOTOMETRY; CANDIDATES;
Keywords:
stars : formation; stars : low-mass, brown dwarfs; stars : pre-main sequence; infrared : stars;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Persi, P CNR, Ist Astrofis Spaziale, Area Ric Tor Vergata, Via Fosso del Cavaliere,I-00133 Rome, Italy CNR Via Fosso del Cavaliere Rome Italy I-00133 00133 Rome, Italy
Citazione:
P. Persi et al., "Sub-arcsec resolution near-infrared images of the Cederblad 110 region", ASTRON ASTR, 376(3), 2001, pp. 907-916

Abstract

We present the results of deep (K-s = 18.9) sub-arcsec resolution (0.3") imaging observations of the Cederblad 110 region in the Chamaeleon I dark cloud. This region (roughly 5' x 5') is characterized by the presence of six ISOCAM-detected young stellar objects (YSOs). Our images have recovered allthese sources at near-infrared (near-IR) wavelengths. Ced 110 IRS4, the brightest object in the region, is associated with a remarkable near-IR bipolar nebulosity. Ced 110 IRS6 is resolved in a double system IRS6a and IRS6b with a separation of similar to 2" (similar to 320 AU at the distance of the Cha I cloud). We have combined 1.3 mm, far and mid-IR fluxes from the literature with our JHK data and obtained the spectral energy distributions (SEDs) for three (IRS4, IRS6a and ISO-ChaI86) of the six ISOCAM sources in the region. We modelled the SEDs of IRS6a and ISO-ChaI86 with a spherically symmetric dusty envelope, using the DUSTY code. These objects are clear Class I sources of the cloud. Finally, we report the detection of three new objects in this region (NIR 72, 84 and 89) with significant near-IR excess. Ifthese sources are associated with the cloud, the derived luminosities and masses suggest that they are candidate young brown dwarfs of Chamaeleon I.

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Documento generato il 06/04/20 alle ore 01:40:45