SCExAO/CHARIS Near-infrared Integral Field Spectroscopy of the HD 15115 Debris Disk

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Fältnamn	Indikatorer	Metadata
000		04083naa a2200625 4500
001		oai:DiVA.org:su-186139
003		SwePub
008		201101s2020 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1861392 URI
024	7	a https://doi.org/10.3847/1538-3881/ababa62 DOI
040		a (SwePub)su
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Lawson, Kellen4 aut
245	1 0	a SCExAO/CHARIS Near-infrared Integral Field Spectroscopy of the HD 15115 Debris Disk
264		c 2020-09-11
264	1	b American Astronomical Society,c 2020
338		a print2 rdacarrier
520		a We present new, near-infrared (1.1-2.4 mu m) high-contrast imaging of the debris disk around HD 15115 with the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system coupled with the Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS). The SCExAO/CHARIS resolves the disk down to rho similar to 02 (r(proj) similar to 10 au), a factor of similar to 3-5 smaller than previous recent studies. We derive a disk position angle of PA similar to 2794-2805 and an inclination ofi similar to 853-86.2. While recent SPHERE/IRDIS imagery of the system could suggest a significantly misaligned two-ring disk geometry, CHARIS imagery does not reveal conclusive evidence for this hypothesis. Moreover, optimizing models of both one- and two-ring geometries using differential evolution, we find that a single ring having a Hong-like scattering phase function matches the data equally well within the CHARIS field of view (rho less than or similar to 1 ''). The disk's asymmetry, well evidenced at larger separations, is also recovered; the west side of the disk appears, on average, around 0.4 mag brighter across the CHARIS bandpass between 025 and 1 ''. Comparing Space Telescope Imaging Spectrograph (STIS) 50CCD optical photometry (2000-10500 A) with CHARIS near-infrared photometry, we find a red (STIS/50CCD-CHARIS broadband) color for both sides of the disk throughout the 04-1 '' region of overlap, in contrast to the blue color reported at similar wavelengths for regions exterior to similar to 2 ''. Further, this color may suggest a smaller minimum grain size than previously estimated at larger separations. Finally, we provide constraints on planetary companions and discuss possible mechanisms for the observed inner disk flux asymmetry and color.
650	7	a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe
650	7	a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng
653		a Circumstellar disks
653		a Debris disks
700	1	a Currie, Thayne4 aut
700	1	a Wisniewski, John P.4 aut
700	1	a Tamura, Motohide4 aut
700	1	a Schneider, Glenn4 aut
700	1	a Augereau, Jean-Charles4 aut
700	1	a Brandt, Timothy D.4 aut
700	1	a Guyon, Olivier4 aut
700	1	a Kasdin, N. Jeremy4 aut
700	1	a Groff, Tyler D.4 aut
700	1	a Lozi, Julien4 aut
700	1	a Chilcote, Jeffrey4 aut
700	1	a Hodapp, Klaus4 aut
700	1	a Jovanovic, Nemanja4 aut
700	1	a Martinache, Frantz4 aut
700	1	a Skaf, Nour4 aut
700	1	a Akiyama, Eiji4 aut
700	1	a Henning, Thomas4 aut
700	1	a Knapp, Gillian R.4 aut
700	1	a Kwon, Jungmi4 aut
700	1	a Mayama, Satoshi4 aut
700	1	a McElwain, Michael W.4 aut
700	1	a Sitko, Michael L.4 aut
700	1	a Asensio-Torres, Rubenu Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)rasen
700	1	a Uyama, Taichi4 aut
700	1	a Wagner, Kevin4 aut
710	2	a Stockholms universitetb Institutionen för astronomi4 org
773	0	t Astronomical Journald : American Astronomical Societyg 160:4q 160:4x 0004-6256x 1538-3881
856	4	u https://authors.library.caltech.edu/104983/3/Lawson_2020_AJ_160_163.pdf
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-186139
856	4 8	u https://doi.org/10.3847/1538-3881/ababa6

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