Unveiling MOA-2007-BLG-192: An M Dwarf Hosting a Likely Super-Earth

Simple item page
dc.citation.issue2
dc.citation.volume168
dc.contributor.authorTerry SK
dc.contributor.authorBeaulieu J-P
dc.contributor.authorBennett DP
dc.contributor.authorHamdorf E
dc.contributor.authorBhattacharya A
dc.contributor.authorChaudhry V
dc.contributor.authorCole AA
dc.contributor.authorKoshimoto N
dc.contributor.authorAnderson J
dc.contributor.authorBachelet E
dc.contributor.authorBlackman JW
dc.contributor.authorBond IA
dc.contributor.authorLu JR
dc.contributor.authorMarquette JB
dc.contributor.authorRanc C
dc.contributor.authorRektsini NE
dc.contributor.authorSahu K
dc.contributor.authorVandorou A
dc.date.accessioned2024-10-11T00:42:28Z
dc.date.available2024-10-11T00:42:28Z
dc.date.issued2024-07-15
dc.description.abstractWe present an analysis of high-angular-resolution images of the microlensing target MOA-2007-BLG-192 using Keck adaptive optics and the Hubble Space Telescope. The planetary host star is robustly detected as it separates from the background source star in nearly all of the Keck and Hubble data. The amplitude and direction of the lens-source separation allows us to break a degeneracy related to the microlensing parallax and source radius crossing time. Thus, we are able to reduce the number of possible binary-lens solutions by a factor of ∼2, demonstrating the power of high-angular-resolution follow-up imaging for events with sparse light-curve coverage. Following Bennett et al., we apply constraints from the high-resolution imaging on the light-curve modeling to find host star and planet masses of M host = 0.28 ± 0.04 M ☉ and m p = 12.49 − 8.03 + 65.47 M ⊕ at a distance from Earth of D L = 2.16 ± 0.30 kpc. This work illustrates the necessity for the Nancy Grace Roman Galactic Exoplanet Survey to use its own high-resolution imaging to inform light-curve modeling for microlensing planets that the mission discovers.
dc.description.confidentialfalse
dc.edition.editionAugust 2024
dc.identifier.citationTerry SK, Beaulieu JP, Bennett DP, Hamdorf E, Bhattacharya A, Chaudhry V, Cole AA, Koshimoto N, Anderson J, Bachelet E, Blackman JW, Bond IA, Lu JR, Marquette JB, Ranc C, Rektsini NE, Sahu K, Vandorou A. (2024). Unveiling MOA-2007-BLG-192: An M Dwarf Hosting a Likely Super-Earth. Astronomical Journal. 168. 2.
dc.identifier.doi10.3847/1538-3881/ad5444
dc.identifier.eissn1538-3881
dc.identifier.elements-typejournal-article
dc.identifier.issn0004-6256
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/71685
dc.languageEnglish
dc.publisherAmerican Astronomical Society
dc.publisher.urihttps://iopscience.iop.org/article/10.3847/1538-3881/ad5444
dc.relation.isPartOfAstronomical Journal
dc.rights(c) 2024 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectExoplanets
dc.subjectGravitational microlensing
dc.subjectAdaptive optics
dc.subjectHigh-resolution microlensing event imaging
dc.subjectObservational astronomy
dc.subjectAstronomy data modeling
dc.subjectHST photometry
dc.subjectAstrometry
dc.titleUnveiling MOA-2007-BLG-192: An M Dwarf Hosting a Likely Super-Earth
dc.typeJournal article
pubs.elements-id490848
pubs.organisational-groupOther
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Published version.pdf
Size:
3.45 MB
Format:
Adobe Portable Document Format
Description:
490848 PDF.pdf
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
9.22 KB
Format:
Plain Text
Description:
Download
Collections
Journal Articles