2019ApJ...872...92F


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.20CET03:36:23

2019ApJ...872...92F - Astrophys. J., 872, 92-92 (2019/February-2)

The planet formation potential around a 45 Myr old accreting M dwarf.

FLAHERTY K., HUGHES A.M., MAMAJEK E.E. and MURPHY S.J.

Abstract (from CDS):

Debris disk detections around M dwarfs are rare, and so far no gas emission has been detected from an M dwarf debris disk. This makes the 45 Myr old M dwarf WISE J080822.18-644357.3 a bit of a curiosity; it has a strong infrared excess at an age beyond the lifetime of a typical planet-forming disk, and also exhibits broad Hα emission consistent with active accretion from a gaseous disk. To better understand the cold gas and dust properties of this system, we obtained ALMA observations of the 1.3 mm continuum and the CO/13CO/C18O J = 2-1 emission lines. No cold CO gas is detected from this system, ruling out a gas-rich protoplanetary disk. Unresolved dust continuum emission is detected at a flux of 198 ± 15 µJy, consistent with 0.057 ± 0.006 M worth of optically thin dust, and consistent with being generated through a collisional cascade induced by large bodies at radii <16 au. With a sufficiently strong stellar wind, dust grains released in the outer disk can migrate inward via PR drag, potentially serving as a source of grains for the strong infrared excess.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): circumstellar matter - stars: individual: WISE J080822.18-644357.3 - submillimeter: planetary systems

Simbad objects: 11

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Number of rows : 11

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 V* V1005 Ori BY* 04 59 34.8341800543 +01 47 00.672080375   11.48 10.107 9.603 8.239 M0Ve 297 0
2 QSO J0635-7516 QSO 06 35 46.5080299 -75 16 16.815501   15.96 15.75 15.82   ~ 504 1
3 WISE J080822.18-644357.3 * 08 08 22.18 -64 43 57.3           M5.5 6 0
4 NGC 2547 OpC 08 09 52.360 -49 10 35.01           ~ 304 0
5 QSO B0903-573 BLL 09 04 53.17928113 -57 35 05.7821238           ~ 66 1
6 V* CE Ant TT* 10 42 30.1021269333 -33 40 16.226774953   12.21 10.91   9.10 M2Ve 147 1
7 HD 95086 * 10 57 03.0216129217 -68 40 02.446874288   7.60 7.36     A8III 116 1
8 V* V1249 Cen TT* 12 15 30.7203284919 -39 48 42.605543199   13.09 11.160 10.919 9.50 M0.5 82 0
9 BD-07 4003 BY* 15 19 26.8271336166 -07 43 20.190958776 13.403 11.76 10.560 9.461 8.911 M3V 527 2
10 GSC 07396-00759 Em* 18 14 22.0738917529 -32 46 10.133784566   14.14 12.78 12.13 10.380 M1Ve 31 0
11 V* AU Mic BY* 20 45 09.5323695486 -31 20 27.241710746   10.05 8.627 9.078 6.593 M1VeBa1 882 0

    Equat.    Gal    SGal    Ecl

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2020.02.20-03:36:23

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