1997A&AS..122...95C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST06:48:42

1997A&AS..122...95C - Astron. Astrophys., Suppl. Ser., 122, 95-109 (1997/April-1)

Optical polarimetry, high-resolution spectroscopy and IR analysis of the Chamaeleon I dark cloud.

COVINO E., PALAZZI E., PENPRASE B.E., SCHWARZ H.E. and TERRANEGRA L.

Abstract (from CDS):

We present optical polarimetry and high resolution spectroscopy of a sample of stars toward the Chamaeleon I dark cloud. We use our polarimetry which includes 33 stars to study the wavelength dependence of the degree and position angle of polarization. From fits to the normalized wavelength dependence of interstellar polarization, we derive estimates of λMax ranging from 4500Å to 6700Å, and PMax ranging from 3 to 8%. The values of λMax were found to be well correlated with the IRAS 100µm intensity, while PMax was found to increase with EB–V. High resolution spectra of the Ca II, CH, and CH+ lines were obtained for 10 stars, which show two components of Ca II in absorption at 3.0<vLSR<5km/s, and vLSR=-3.0km/s and a single strong molecular CH absorption component at 3.0<vLSR<5.0km/s. From our data we found, by interpretation of the various correlations between the polarimetry, photometry and IRAS fluxes, the following: the probable presence of shocked molecular gas; a warm molecular CH component; small dust grains at the edges of the cloud, and larger grains in the central parts, which are causing the polarization. Our results provide a consistent picture of the gas and dust content in the Cha I region, where larger grains, responsible of the starlight polarization, exist in the center of the cloud, surrounded by envelopes of warmer molecular and atomic material.

Abstract Copyright:

Journal keyword(s): ISM: chamacleon clouds - dust, extinction - atoms - molecules - polarization - infrared: ISM: continuum

Simbad objects: 39

goto Full paper

goto View the reference in ADS

Number of rows : 39

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 CD-76 476 * 10 49 01.3665819698 -76 54 27.919333488   11.74 10.13     K4III 9 0
2 CD-77 469 * 10 50 36.8794507941 -77 58 05.443090322   10.43 9.88     B8V 9 0
3 HD 94414 * 10 50 55.9491869107 -77 07 28.551731411   8.43 8.01     B4V 33 0
4 TYC 9410-368-1 * 10 55 48.6114351011 -76 51 50.571965105   11.63 11.02     A2V 10 0
5 CD-75 514 * 10 56 11.4549748142 -76 35 52.873700488   10.64 10.39     B5V 12 0
6 CD-76 481 PM* 10 59 04.2209965037 -77 05 57.117475352   11.11 9.48     K0III 12 0
7 Glass K * 11 01 00.0686647718 -77 38 51.713347067   15.87 13.77 13.43 11.25 K3III 7 0
8 CD-75 518 * 11 01 14.0897724380 -76 32 26.695678125   11.23 10.64     B9V 9 0
9 Glass C TT* 11 03 11.5647749656 -77 21 04.319192459   12.59 11.48     G2V 24 0
10 Glass L * 11 03 22.8785711791 -77 41 30.191529507     15.22   12.28 G8III 6 0
11 Glass T * 11 04 07.9518543041 -76 52 12.840580920   13.346 11.408 10.841 9.41 K3III 11 0
12 Glass D * 11 04 16.8711108878 -77 17 38.678660083     14.10 13.65 11.66 G8III 6 0
13 Glass E * 11 04 48.9969728113 -77 16 26.189974337   15.702 13.040 12.38 9.28 M5III 8 0
14 IRAS 11042-7552 FIR 11 05 47.8 -76 08 44           ~ 1 0
15 HD 96675 pr* 11 05 57.8104415475 -76 07 48.883424761   7.82 7.68   8.48 B6IV/V 68 0
16 NAME Cha I MoC 11 06 48 -77 18.0           ~ 968 1
17 Glass B * 11 06 58.5383709047 -77 13 32.426103383   15.336 12.921 12.52 9.85 G8III 10 0
18 Glass G * 11 07 16.5173635684 -77 26 21.432273595     15.14     K4III 10 0
19 Glass H Y*O 11 07 55.887 -77 27 25.75   15.30 13.49   11.04 K3Ve 51 0
20 HD 97048 Ae* 11 08 03.3105687971 -77 39 17.491180130 9.03 8.76 9.00   8.64 A0Vep 458 0
21 BRAN 341B RNe 11 08 03.4 -77 39 19           ~ 27 0
22 Glass A * 11 08 25.7666174259 -76 48 31.545437163   13.130 11.353     K3III 15 0
23 HD 97300 Ae* 11 09 50.0178181814 -76 36 47.711452436   9.41 9.20   8.82 B9V 157 1
24 Ced 112 RNe 11 09 52.4 -76 36 57           ~ 31 0
25 Glass O * 11 09 53.1575701665 -77 45 40.078400098   17.41 15.06 14.93 12.54 G8III 10 0
26 Glass Q Y*O 11 10 37.9009258039 -77 32 39.873598579   16.89 14.97   11.90 K5.5+K7 67 0
27 Glass P * 11 11 13.3163835514 -77 31 17.931111865     13.76 13.49 10.69 K0III 13 0
28 CD-75 528 * 11 13 31.9405749003 -76 03 24.417479854   10.82 9.60     G9III 7 0
29 CD-76 489 * 11 15 09.695 -77 02 15.86     9.5     K3III 8 0
30 HD 98143 * 11 15 16.9025160724 -77 31 06.120303495   8.12 7.61     B8III 33 0
31 HD 98294 * 11 16 38.8110193214 -75 13 19.248799242   8.69 8.52     B8V 11 0
32 HD 98561 * 11 18 44.1047468072 -75 24 58.321749353   8.78 8.35     A3/4IV 11 0
33 HD 98627 * 11 19 03.8020976846 -75 49 29.620683963   9.10 7.38     K5III 13 0
34 HD 98672 * 11 19 36.5278698802 -75 08 32.821491926   6.241 6.258     B9.5/A0V 24 0
35 HD 99015 PM* 11 21 56.8915269389 -77 36 30.123065810   6.624 6.423     A5III/IV 19 0
36 HD 99161 * 11 23 06.9017344523 -76 00 26.976787023   9.01 8.89     B9.5V 13 0
37 HD 99515 * 11 25 18.8506406896 -77 42 01.406870182   9.77 9.35     A8IV 12 0
38 HD 99759 * 11 27 16.1177135611 -75 56 02.289684348   8.75 8.51     B9.5V 17 0
39 HD 100401 * 11 31 55.2987808136 -76 18 11.406949797   9.47 8.38     G6III/IV 13 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 1997A&AS..122...95C and select 'bookmark this link' or equivalent in the popup menu


2020.07.05-06:48:42

© Université de Strasbourg/CNRS

    • Contact