2016MNRAS.455.4373D


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET16:59:33

2016MNRAS.455.4373D - Mon. Not. R. Astron. Soc., 455, 4373-4387 (2016/February-1)

Hubble Tarantula Treasury Project - IV. The extinction law.

DE MARCHI G., PANAGIA N., SABBI E., LENNON D., ANDERSON J., VAN DER MAREL R., CIGNONI M., GREBEL E.K., LARSEN S., ZARITSKY D., ZEIDLER P., GOULIERMIS D. and ALOISI A.

Abstract (from CDS):

We report on the study of interstellar extinction across the Tarantula Nebula (30 Doradus), in the Large Magellanic Cloud, using observations from the Hubble Tarantula Treasury Project in the 0.3-1.6µm range. The considerable and patchy extinction inside the nebula causes about 3500 red clump stars to be scattered along the reddening vector in the colour-magnitude diagrams, thereby allowing an accurate determination of the reddening slope in all bands. The measured slope of the reddening vector is remarkably steeper in all bands than in the the Galactic diffuse interstellar medium. At optical wavelengths, the larger ratio of total-to-selective extinction, namely RV = 4.5±0.2, implies the presence of a grey component in the extinction law, due to a larger fraction of large grains. The extra large grains are most likely ices from supernova ejecta and will significantly alter the extinction properties of the region until they sublimate in 50-100 Myr. We discuss the implications of this extinction law for the Tarantula Nebula and in general for regions of massive star formation in galaxies. Our results suggest that fluxes of strongly star-forming regions are likely to be underestimated by a factor of about 2 in the optical.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): Hertzsprung-Russell and colour-magnitude diagrams - dust, extinction - Magellanic Clouds

Errata: erratum vol. 458, p. 2061 (2016)

Simbad objects: 16

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Number of rows : 16

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9710 1
2 NGC 346 Cl* 00 59 05.090 -72 10 33.24           ~ 453 0
3 SN 2010ji SN* 01 45 31.91 +25 32 15.3           SNIIP 9 1
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5868 1
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15214 1
6 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4563 2
7 CPD-69 436 s*b 05 37 09.1873 -69 20 19.520   12.19 12.12     BC1.5Ia 24 0
8 NGC 2060 SNR 05 37 51.4470067818 -69 10 23.957283532   9.69 9.59     ~ 327 2
9 H88 301 Cl* 05 38 16 -69 04.0   11.18 10.89     ~ 66 0
10 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1060 2
11 BAT99 112 WR* 05 38 42.9162 -69 06 04.938   12.95 12.86     WN5h 50 0
12 UCAC4 105-014417 WR* 05 38 55.5218836143 -69 04 26.810760074   16.66 16.08   14.89 WN5h 50 0
13 SK -68 140 Em* 05 38 57.1718920252 -68 56 53.152675540   12.81 12.71 12.89   B0.7Ib-IabNwk 30 0
14 NAME LMC 2 Supergiant Shell sh 05 41 27 -69 22.4           ~ 170 0
15 SN 2010jl SN* 09 42 53.33 +09 29 41.8           SNIIn 214 1
16 UGC 5189 GiG 09 42 58.193 +09 28 15.64   13.7       ~ 49 0

    Equat.    Gal    SGal    Ecl

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2021.03.05-16:59:33

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