2008A&A...487..741A


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.10CET06:52:04

2008A&A...487..741A - Astronomy and Astrophysics, volume 487, 741-748 (2008/8-4)

Visible spectroscopy of the new ESO large program on trans-Neptunian objects and Centaurs. Part 1.

ALVAREZ-CANDAL A., FORNASIER S., BARUCCI M.A., DE BERGH C. and MERLIN F.

Abstract (from CDS):

A second large observational program was started to improve our knowledge of the physical properties of Centaurs and trans-Neptunian objects, TNOs. The program is being executed in the facilities at the Cerro Paranal of the European Southern Observatory, ESO, in Chile. Visible spectroscopy was carried out using FORS1 at the UT2 of the VLT telescope. We computed the spectral slope, S, for each object, and we searched for the possible existence of weak absorption features. We compared our data with those from the literature. We present spectra for 21 objects, 7 of them with no previously reported spectra. Our sample includes 5 Centaurs, 5 resonant objects, 8 classical TNOs, 2 detached objects, and 1 scattered disk object. There are significant differences between the distribution of spectral slopes for Centaurs and classical TNOs. The data presented here generally agree with previous published data. One exception is 60558 Echeclus, whose spectral slope is considerably smaller than previous measurements. Another interesting object is 47932 (2000 GN171), which does not show evidence of a proposed feature at 0.7µm. Most of the spectra are linear and featureless; however, the well-known bands of solid methane are detected in 136199 Eris spectra and some weak features are detected for a few other objects. The most interesting case is that of 2003 AZ84, which has a feature at about 0.65µm, maybe due to aqueous alteration.

Abstract Copyright:

Journal keyword(s): techniques: spectroscopic - Kuiper Belt

Simbad objects: 10

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Number of rows : 10

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 HD 1368 PM* 00 17 54.6590364002 +00 22 40.169522952   9.42   8.4   G2V 51 0
2 HD 2966 PM* 00 32 50.1015894957 -13 15 27.521847077   9.40 8.72     G5V 23 0
3 HD 11532 PM* 01 53 18.3712379665 +00 22 23.275219132   10.36 9.71     G8III/IV 51 1
4 HD 292561 * 06 51 33.7279121561 -00 11 31.522487958 11.277 11.183 10.574 10.226 9.905 F8 43 0
5 BD+00 2717 * 10 57 04.0449104240 -00 13 12.886842194 10.822 10.567 9.903 9.537 9.206 ~ 53 0
6 HD 107998 PM* 12 24 44.7190910398 -41 23 03.450853548   7.578 6.327     K2/3III 16 0
7 HD 139287 PM* 15 37 18.1482181279 -00 09 49.690868022   9.04 8.44     G2/3V 30 0
8 HD 147284 PM* 16 21 55.4383328944 -24 59 28.696503121   9.48 8.80     G3V 31 0
9 HD 174935 * 18 52 46.9431251622 +10 14 46.393731815   8.78 8.36     F0 8 0
10 BD-00 4557 PM* 23 42 41.8263315718 +00 45 13.136892747 10.411 10.305 9.693 9.339 8.991 F8 48 0

    Equat.    Gal    SGal    Ecl

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2019.12.10-06:52:05

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