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Sökning: onr:"swepub:oai:DiVA.org:su-163583" > SCExAO/CHARIS Near-...

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FältnamnIndikatorerMetadata
00004694naa a2200757 4500
001oai:DiVA.org:su-163583
003SwePub
008190111s2018 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1635832 URI
0247 a https://doi.org/10.3847/1538-3881/aae9ea2 DOI
040 a (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Currie, Thayne4 aut
2451 0a SCExAO/CHARIS Near-infrared Direct Imaging, Spectroscopy, and Forward-Modeling of kappa And b :b A Likely Young, Low-gravity Superjovian Companion
264 c 2018-11-30
264 1b American Astronomical Society,c 2018
338 a print2 rdacarrier
520 a We present SCExAO/CHARIS high-contrast imaging/JHK integral field spectroscopy of kappa And b, a directly imaged low-mass companion orbiting a nearby B9V star. We detect kappa And b at a high signal-to-noise ratio and extract high-precision spectrophotometry using a new forward-modeling algorithm for (A-)LOCI complementary to KLIP-FM developed by Pueyo et al. kappa And b's spectrum best resembles that of a low-gravity LO-L1 dwarf (L0-L1 gamma). Its spectrum and luminosity are very well matched by 2MASS J0141-4633 and several other 12.5-15 M-J free-floating members of the 40 Myr old Tuc-Hor Association, consistent with a system age derived from recent interferometric results for the primary, a companion mass at/near the deuterium-burning limit (13(-2)(+12) M-J), and a companion-to-primary mass ratio characteristic of other directly imaged planets (q similar to 0.0051(-0.001)(+0.005)). We did not unambiguously identify additional, more closely orbiting companions brighter and more massive than kappa And b down to p similar to 0.'' 3 (15 au). SCExAO/CHARIS and complementary Keck/NIRC2 astrometric points reveal clockwise orbital motion. Modeling points toward a likely eccentric orbit: a subset of acceptable orbits include those that are aligned with the star's rotation axis. However, kappa And b's semimajor axis is plausibly larger than 55 au and in a region where disk instability could form massive companions. Deeper high-contrast imaging of kappa And and low-resolution spectroscopy from extreme adaptive optics systems such as SCExAO/CHARIS and higher-resolution spectroscopy from Keck/OSIRIS or, later, IRIS on the Thirty Meter Telescope could help to clarify kappa And b's chemistry and whether its spectrum provides an insight into its formation environment.
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
653 a planetary systems
653 a stars: early-type
653 a stars:individual: (HD 222439)
653 a techniques: high angular resolution
653 a Astronomy
653 a astronomi
7001 a Brandt, Timothy D.4 aut
7001 a Uyama, Taichi4 aut
7001 a Nielsen, Eric L.4 aut
7001 a Blunt, Sarah4 aut
7001 a Guyon, Olivier4 aut
7001 a Tamura, Motohide4 aut
7001 a Marois, Christian4 aut
7001 a Mede, Kyle4 aut
7001 a Kuzuhara, Masayuki4 aut
7001 a Groff, Tyler D.4 aut
7001 a Jovanovic, Nemanja4 aut
7001 a Kasdin, N. Jeremy4 aut
7001 a Lozi, Julien4 aut
7001 a Hodapp, Klaus4 aut
7001 a Chilcote, Jeffrey4 aut
7001 a Carson, Joseph4 aut
7001 a Martinache, Frantz4 aut
7001 a Goebel, Sean4 aut
7001 a Grady, Carol4 aut
7001 a McElwain, Michael4 aut
7001 a Akiyama, Eiji4 aut
7001 a Asensio-Torres, Rubenu Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)rasen
7001 a Hayashi, Masa4 aut
7001 a Janson, Markusu Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)mjanso
7001 a Knapp, Gillian R.4 aut
7001 a Kwon, Jungmi4 aut
7001 a Nishikawa, Jun4 aut
7001 a Oh, Daehyeon4 aut
7001 a Schlieder, Joshua4 aut
7001 a Serabyn, Eugene4 aut
7001 a Sitko, Michael4 aut
7001 a Skaf, Nour4 aut
7102 a Stockholms universitetb Institutionen för astronomi4 org
7730 t Astronomical Journald : American Astronomical Societyg 156:6q 156:6x 0004-6256x 1538-3881
8564 u https://authors.library.caltech.edu/91361/3/Currie_2018_AJ_156_291.pdf
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-163583
8564 8u https://doi.org/10.3847/1538-3881/aae9ea

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