|Debris Disks around Low-Mass Planet-Bearing Stars
|Follow-up Herschel observations have recently confirmed the presence of a resolved debris disk around GJ 581, a nearby M star with 4 low-mass (super-Earth) planets. Debris disks around M stars are exceedingly rare (virgul1% detection rate in the DEBRIS survey), raising the question of whether the debris might somehow be directly related to the neighboring planets. In order to assess whether low-mass planets are strongly correlated with dusty debris or whether this is just a chance coincidence, we propose to dramatically increase the number of planet-bearing M stars observed by Herschel, from the current 3 up to a total of 20 stars. The proposed PACS 100-160 um images of 17 planet-bearing M stars will clarify whether this class of system preferentially has orbiting debris. Should any new disks be detected, the close proximity of the target M stars (virgul10 pc) makes them favorable candidates for resolved imaging, which may help to explain the unusual asymmetry in GJ 581.s similarly resolved disk.
|Kuiper belt analogues in nearby M-type planet-host systems . Kennedy G. M. et al. . Monthly Notices of the Royal Astronomical Society, Volume 476, Issue 4, p.4584-4591 . 476 . 10.1093/mnras/sty492 . 2018MNRAS.476.4584K ,
|Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 µm range, bridging the gap between earlier infrared space missions and groundbased facilities.
|Publisher And Registrant
|European Space Agency
|European Space Agency, 2013, OT2_gbryden_2, SPG v14.2.0. https://doi.org/10.5270/esa-ggkplsm