2017ApJ...850L...6A


Query : 2017ApJ...850L...6A

2017ApJ...850L...6A - Astrophys. J., 850, L6-L6 (2017/November-3)

ALMA discovery of dust belts around Proxima Centauri.

ANGLADA G., AMADO P.J., ORTIZ J.L., GOMEZ J.F., MACIAS E., ALBERDI A., OSORIO M., GOMEZ J.L., DE GREGORIO-MONSALVO I., PEREZ-TORRES M.A., ANGLADA-ESCUDE G., BERDINAS Z.M., JENKINS J.S., JIMENEZ-SERRA I., LARA L.M., LOPEZ-GONZALEZ M.J., LOPEZ-PUERTAS M., MORALES N., RIBAS I., RICHARDS A.M.S., RODRIGUEZ-LOPEZ C. and RODRIGUEZ E.

Abstract (from CDS):

Proxima Centauri, the star closest to our Sun, is known to host at least one terrestrial planet candidate in a temperate orbit. Here we report the Atacama Large Millimeter/submillimeter Array (ALMA) detection of the star at 1.3 mm wavelength and the discovery of a belt of dust orbiting around it at distances ranging between 1 and 4 au, approximately. Given the low luminosity of the Proxima Centauri star, we estimate a characteristic temperature of about 40 K for this dust, which might constitute the dust component of a small-scale analog to our solar system's Kuiper Belt. The estimated total mass, including dust and bodies up to 50 km in size, is of the order of 0.01 Earth masses, which is similar to that of the solar Kuiper Belt. Our data also show a hint of warmer dust closer to the star. We also find signs of two additional features that might be associated with the Proxima Centauri system that still require further observations to be confirmed: an outer extremely cold (about 10 K) belt around the star at about 30 au, with an orbital plane that is tilted about 45° with respect to the plane of the sky; additionally, we marginally detect a compact 1.3 mm emission source at a projected distance of about 1.2 arcsec from the star, the nature of which is still unknown.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): circumstellar matter - planetary systems - radio continuum: planetary systems - stars: individual: Proxima Centauri - stars: individual: Proxima Centauri

Simbad objects: 9

goto Full paper

goto View the references in ADS

Number of rows : 9
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 VLBI 1325-558 QSO 13 29 01.1458999868 -56 08 02.653470323           ~ 63 2
2 ICRF J142455.5-680758 QSO 14 24 55.55739563 -68 07 58.0945205           ~ 35 1
3 QSO B1424-41 QSO 14 27 56.29756536 -42 06 19.4375991   18.48 17.7 16.30   ~ 402 1
4 NAME Proxima Centauri Er* 14 29 42.9451234609 -62 40 46.170818907 14.21 12.95 11.13 9.45 7.41 M5.5Ve 1067 0
5 NAME Proxima Centauri b Pl 14 29 42.9451234609 -62 40 46.170818907           ~ 265 0
6 * alf Cen ** 14 39 29.71993 -60 49 55.9990   0.4 -0.1     G2V+K1V 862 0
7 QSO B1514-24 BLL 15 17 41.8135246339 -24 22 19.482167214   15.13 14.00 13.95   ~ 684 3
8 3FGL J1617.4-5846 AGN 16 17 17.8913859288 -58 48 07.860059063   18.23       ~ 107 1
9 QSO B1921-293 BLL 19 24 51.05595514 -29 14 30.1210524   18.71 18.21 15.07   ~ 738 0

To bookmark this query, right click on this link: simbad:objects in 2017ApJ...850L...6A and select 'bookmark this link' or equivalent in the popup menu


2021.09.26-05:15:31

© Université de Strasbourg/CNRS

    • Contact