2012A&A...548A.111M


Query : 2012A&A...548A.111M

2012A&A...548A.111M - Astronomy and Astrophysics, volume 548A, 111-111 (2012/12-1)

A new Herschel view of the young star T54: not a transitional disk?

MATRA L., MERIN B., ALVES DE OLIVEIRA C., HUELAMO N., KOSPAL A., COX N.L.J., RIBAS A., PUGA E., VAVREK R., ROYER P., PRUSTI T., PILBRATT G.L. and ANDRE P.

Abstract (from CDS):

Observations of transitional disks give us an understanding of the formation of planets and planetary systems such as our own. But care must be taken in identifying such sources: the higher spatial resolution of the Herschel Space Observatory provides a new view of the origin of the far-infrared and submillimeter excesses observed. We review the nature of previously known transitional disks in the Chamaeleon I star-forming region with Herschel data. We analyze Herschel PACS and SPIRE images of the young star T54, together with ancillary images. We also analyze its spectral energy distribution and indications from optical and mid-infrared spectroscopy. We detect extended emission in the PACS 70µm image ∼6'' off source at a position angle of 196° from T54. The emission detected at longer wavelengths (PACS 100, 160, SPIRE 250 and 350µm) is also offset from the position of the star. This suggests that the excess observed in the far-infrared part of the SED is not fully associated with T54. Herschel images show that the far-infrared excess seen in T54 is not due to a transitional disk but to extended emission southwest of the source. The object still shows point-like and now downscaled excess at mid-infrared wavelengths, but its origin cannot be constrained without higher spatial resolution data. However, different indications point towards an evolved disk or extended unresolved emission close to the source.

Abstract Copyright:

Journal keyword(s): stars: formation - stars: pre-main sequence - protoplanetary disks - circumstellar matter - stars: individual: HM Anon

Simbad objects: 12

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Number of rows : 12
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 IRAS 04125+2902 TT* 04 15 42.7871248704 +29 09 59.832447840 19.191 17.442 15.487 13.954 12.418 M0 41 0
2 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4093 0
3 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1095 1
4 Ass Cha T 1-12 Y*O 11 07 19.1444866104 -76 03 04.864188060   17.05 15.35   12.57 M4Ve 66 0
5 2MASS J11124076-7722378 NIR 11 12 40.6370090424 -77 22 37.818469812           ~ 1 0
6 Ass Cha T 2-54 TT* 11 12 42.6709132056 -77 22 22.943489160     11.103   9.653 G8+K7 84 2
7 GN 11.11.2 RNe 11 12 43 -77 22.4           ~ 4 0
8 V* T Cha Or* 11 57 13.5245085552 -79 21 31.530508884   10.00 11.86     K0e 260 1
9 NAME Cha II MoC 12 54 -77.2           ~ 321 0
10 Sz 84 TT* 15 58 02.5198436808 -37 36 02.729938536   14.3       M5.0e 64 0
11 Haro 1-6 Or* 16 26 03.0276684144 -24 23 36.188140848   14.15 14.01 12.38 10.80 K0 213 2
12 2MASS J18285808+0017243 Y*O 18 28 58.0893831912 +00 17 24.385868376       21.9   G3: 17 1

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2023.01.27-12:49:15

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