2000A&A...363..755K


Query : 2000A&A...363..755K

2000A&A...363..755K - Astronomy and Astrophysics, volume 363, 755-766 (2000/11-2)

Low mass clouds in the Cepheus-Cassiopeia void. I. Khavtassi 15.

KISS C., TOTH L.V., MOOR A., SATO F., NIKOLIC S. and WOUTERLOOT J.G.A.

Abstract (from CDS):

We present the results of optical, far-infrared and radio observations of the small, non-star forming dark cloud Khavtassi 15, located in the Upper Cepheus-Cassiopeia region. We derive an average extinction of AV=1.6mag and a distance of 250±25pc from Digitized Sky Survey data and star counts using objective prism spectroscopy. A fully computerized algorithm was used for non-biased analysis of starcount data. A kinetic temperature of 7K and a peak number density of n(H2)=5.9x103cm–3 were estimated from multiisotopic, multilevel CO measurements. CO measurements also revealed three main condensations inside the cloud. Kh 15 has a total gas mass of 34M and it is most probably part of a shell seen as a FIR loop called GIRL 126+10. We investigated the correlation among optical extinction, radio and FIR emission and masses derived for the dust and gas inside the cloud core. Stability analysis has shown, that object Kh 15 is not far from gravitational virial equilibrium, and may be fully stabilized by the external pressure. In addition to Kh 15, the starcounts also indicate the presence of an extended nearby extinction layer at d ≤150pc which we consider as the wall of the Local Bubble (LB) towards the Upper Cepheus-Cassiopeia. Distances of the dark clouds LDN 1308, LDN 1333 and Khavtassi 19 are also estimated.

Abstract Copyright:

Journal keyword(s): ISM: clouds - ISM: dust, extinction - ISM: molecules - ISM: individual objects: Kh 15 - ISM: individual objects: LDN 1308

Nomenclature: Fig.7: [KTM2000] CN (Nos C1-C3).

CDS comments: Fig.5: N=20 IRAS PSC sources 'NN', those without their IRAS HHMMm+DDMM designation are not in SIMBAD.

Simbad objects: 23

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Number of rows : 23
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME Cas Cloud ~ 00 37 +65.8           ~ 27 0
2 [K60] 216 DNe 00 46 12 +72 30.8           ~ 2 0
3 IREC 169 DNe 00 48 +72.5           ~ 4 0
4 IRAS 00449+7208 FIR 00 48 10.0 +72 24 23           ~ 1 0
5 [YDM97] CO 137 MoC 00 49 42.6 +72 28 20           ~ 2 0
6 MCG+12-02-001 G 00 54 03.943 +73 05 05.23   16       ~ 99 1
7 LDN 1308 DNe 01 13.7 +72 56           ~ 5 0
8 GIRL G126+10 IR 01 32 +73.0           ~ 2 0
9 LDN 1333 DNe 02 26 04 +75 28.5           ~ 54 0
10 LDN 1780 DNe 15 39.7 -07 10           ~ 75 0
11 LDN 169 DNe 15 52.6 -03 19           ~ 24 0
12 LDN 134 MoC 15 53 36.3 -04 35 26           ~ 202 0
13 LDN 183 MoC 15 54 12.2 -02 49 42           ~ 724 1
14 V* T Cep Mi* 21 09 31.7834766408 +68 29 27.231070884 9.15 8.82 7.33     M6-9e 373 0
15 LDN 1235 DNe 22 14 55 +73 25.0           ~ 25 0
16 LDN 1251 DNe 22 36.1 +75 16           ~ 104 0
17 LDN 1251B DNe 22 38 46.79 +75 11 32.6           ~ 51 1
18 NAME Cepheus Flare MoC 23 34 +72.0           ~ 116 0
19 LDN 1274 MoC 23 57.5 +70 57           ~ 8 0
20 [K55] 20 DNe ~ ~           ~ 1 0
21 [K55] 19 DNe ~ ~           ~ 1 0
22 NAME Local Bubble ISM ~ ~           ~ 784 0
23 NAME Cas-Cep Region vid ~ ~           ~ 16 0

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2022.05.29-11:19:16

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