WFRF:(Hayashi Masahiko)
Sökning: WFRF:(Hayashi Masahiko) > (2022) > Direct-imaging Disc...
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04171naa a2200721 4500 | |
| 001 | oai:DiVA.org:su-208309 | |
| 003 | SwePub | |
| 008 | 220826s2022 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-2083092 URI |
| 024 | 7 | a https://doi.org/10.3847/2041-8213/ac772f2 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 Kuzuhara, Masayuki4 aut |
| 245 | 1 0 | a Direct-imaging Discovery and Dynamical Mass of a Substellar Companion Orbiting an Accelerating Hyades Sun-like Star with SCExAO/CHARIS |
| 264 | c 2022-07-27 | |
| 264 | 1 | b American Astronomical Society,c 2022 |
| 338 | a print2 rdacarrier | |
| 520 | a We present the direct-imaging discovery of a substellar companion in orbit around a Sun-like star member of the Hyades open cluster. So far, no other substellar companions have been unambiguously confirmed via direct imaging around main-sequence stars in Hyades. The star HIP 21152 is an accelerating star as identified by the astrometry from the Gaia and Hipparcos satellites. We detected the companion, HIP 21152 B, in multiple epochs using the high-contrast imaging from SCExAO/CHARIS and Keck/NIRC2. We also obtained the stellar radialvelocity data from the Okayama 188 cm telescope. The CHARIS spectroscopy reveals that HIP 21152 B’s spectrum is consistent with the L/T transition, best fit by an early T dwarf. Our orbit modeling determines the semimajor axis and the dynamical mass of HIP 21152 B to be 17.5-+3.87.2 au and 27.8-+5.48.4 MJup, respectively. The mass ratio of HIP 21152 B relative to its host is ≈2%, near the planet/brown dwarf boundary suggested by recent surveys. Mass estimates inferred from luminosity-evolution models are slightly higher (33–42 MJup). With a dynamical mass and a well-constrained age due to the system’s Hyades membership, HIP 21152 B will become a critical benchmark in understanding the formation, evolution, and atmosphere of a substellar object as a function of mass and age. Our discovery is yet another key proof of concept for using precision astrometry to select directimaging targets. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 700 | 1 | a Currie, Thayne4 aut |
| 700 | 1 | a Takarada, Takuya4 aut |
| 700 | 1 | a Brandt, Timothy D.4 aut |
| 700 | 1 | a Sato, Bunei4 aut |
| 700 | 1 | a Uyama, Taichi4 aut |
| 700 | 1 | a Janson, Markusu Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)mjanso |
| 700 | 1 | a Chilcote, Jeffrey4 aut |
| 700 | 1 | a Tobin, Taylor4 aut |
| 700 | 1 | a Lawson, Kellen4 aut |
| 700 | 1 | a Hori, Yasunori4 aut |
| 700 | 1 | a Guyon, Olivier4 aut |
| 700 | 1 | a Groff, Tyler D.4 aut |
| 700 | 1 | a Lozi, Julien4 aut |
| 700 | 1 | a Vievard, Sebastien4 aut |
| 700 | 1 | a Sahoo, Ananya4 aut |
| 700 | 1 | a Deo, Vincent4 aut |
| 700 | 1 | a Jovanovic, Nemanja4 aut |
| 700 | 1 | a Ahn, Kyohoon4 aut |
| 700 | 1 | a Martinache, Frantz4 aut |
| 700 | 1 | a Skaf, Nour4 aut |
| 700 | 1 | a Akiyama, Eiji4 aut |
| 700 | 1 | a Norris, Barnaby R.4 aut |
| 700 | 1 | a Bonnefoy, Mickaël4 aut |
| 700 | 1 | a Helminiak, Krzysztof G.4 aut |
| 700 | 1 | a Kudo, Tomoyuki4 aut |
| 700 | 1 | a McElwain, Michael W.4 aut |
| 700 | 1 | a Samland, Matthias4 aut |
| 700 | 1 | a Wagner, Kevin4 aut |
| 700 | 1 | a Wisniewski, John4 aut |
| 700 | 1 | a Knapp, Gillian R.4 aut |
| 700 | 1 | a Kwon, Jungmi4 aut |
| 700 | 1 | a Nishikawa, Jun4 aut |
| 700 | 1 | a Serabyn, Eugene4 aut |
| 700 | 1 | a Hayashi, Masahiko4 aut |
| 700 | 1 | a Tamura, Motohide4 aut |
| 710 | 2 | a Stockholms universitetb Institutionen för astronomi4 org |
| 773 | 0 | t Astrophysical Journal Lettersd : American Astronomical Societyg 934:2q 934:2x 2041-8205x 2041-8213 |
| 856 | 4 | u https://doi.org/10.3847/2041-8213/ac772fy Fulltext |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-208309 |
| 856 | 4 8 | u https://doi.org/10.3847/2041-8213/ac772f |
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