2010A&A...509A..44M


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.12CET13:03:12

2010A&A...509A..44M - Astronomy and Astrophysics, volume 509, A44-44 (2010/1-1)

A method to determine distances to molecular clouds using near-IR photometry.

MAHESWAR G., LEE C.W., BHATT H.C., MALLIK S.V. and DIB S.

Abstract (from CDS):

We aim to develop a method to determine distances to molecular clouds using JHK near-infrared photometry. The method is based on a technique that aids spectral classification of stars lying towards the fields containing the clouds into main sequence and giants. In this technique, the observed (J-H) and (H-Ks) colours are dereddened simultaneously using trial values of AV and a normal interstellar extinction law. The best fit of the dereddened colours to the intrinsic colours giving a minimum value of χ2 then yields the corresponding spectral type and AV for the star. The main sequence stars, thus classified, are then utilized in an AV versus distance plot to bracket the cloud distances. We applied the method to four clouds, L1517, Chamaeleon I, Lupus 3 and NGC 7023 and estimated their distances as 167±30, 151±28, 157±29 and 408±76pc respectively, which are in good agreement with the previous distance estimations available in the literature.

Abstract Copyright:

Journal keyword(s): dust, extinction - ISM: clouds - stars: distances - infrared: ISM

Simbad objects: 29

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Number of rows : 29

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 NAME Tau-Aur Region SFR 04 30 +25.0           ~ 1183 1
2 LDN 1517 DNe 04 55 45 +30 33.0           ~ 94 0
3 V* AB Aur Ae* 04 55 45.8459978418 +30 33 04.293281305 7.20 7.16 7.05 6.96 6.70 A0Ve 904 2
4 GN 04.52.5.02 RNe 04 55 46 +30 33.1           ~ 2 0
5 V* SU Aur TT* 04 55 59.3861369488 +30 34 01.499800471   10.33 9.30 9.17   G2IIIne 525 0
6 GUM 29 HII 10 24 14.6 -57 46 58           ~ 190 0
7 NAME Cha I MoC 11 06 48 -77 18.0           ~ 942 1
8 HD 97048 Ae* 11 08 03.3105687971 -77 39 17.491180130 9.03 8.76 9.00   8.64 A0Vep 438 0
9 BRAN 341B BNe 11 08 03.4 -77 39 19           ~ 27 0
10 HD 97300 Ae* 11 09 50.0178181814 -76 36 47.711452436   9.41 9.20   8.82 B9V 157 1
11 Ced 112 RNe 11 09 52.4 -76 36 57           ~ 31 0
12 NAME Cha Dark Cloud SFR 11 55 -78.0           ~ 529 1
13 NAME Musca Cld 12 23 -71.3           ~ 153 0
14 NAME Coalsack Nebula DNe 12 31 19 -63 44.6           ~ 239 0
15 HD 143261 * 16 00 56.4062781015 -39 30 35.525254148   10.75 9.77     K1/2(III) 5 0
16 NAME Lup Cloud SFR 16 03 -38.1           ~ 485 0
17 GN 16.05.2 RNe 16 08 34 -39 05.6           ~ 2 0
18 V* V856 Sco dS* 16 08 34.2868591379 -39 06 18.326059778 7.66 7.41 7.05 6.92   A7 345 0
19 NAME Lupus III SFR 16 09.6 -39 03           ~ 264 0
20 HD 145355 * 16 11 58.0105504771 -38 12 34.051271748   10.67 9.85     A1III 4 0
21 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2944 0
22 NAME the Pipe Nebula DNe 17 30 -25.0           ~ 321 1
23 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11085 0
24 LDN 1171 DNe 20 53 32 +68 18.5           ~ 10 0
25 LDN 1174 DNe 21 00 22.4 +68 12 53           ~ 58 0
26 NGC 7023 BNe 21 01 36.9 +68 09 48   7.20       ~ 605 0
27 HD 200775 Ae* 21 01 36.9184805541 +68 09 47.770037306 7.34 7.73 7.36     B2Ve 504 0
28 LDN 1167 DNe 21 03.7 +67 02           ~ 11 0
29 NAME LDN 1147-1158 ~ ~ ~           ~ 2 0

    Equat.    Gal    SGal    Ecl

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2019.12.12-13:03:12

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