Forming Gas Giants around a Range of Protostellar M-dwarfs by Gas Disk Gravitational Instability

Autor: Alan P. Boss, Shubham Kanodia

Publikováno v: The Astrophysical Journal, Vol 956, Iss 1, p 4 (2023)

Recent discoveries of gas giant exoplanets around M-dwarfs from transiting and radial velocity surveys are difficult to explain with core-accretion models. We present here a homogeneous suite of 162 models of gravitationally unstable gaseous disks. T

Externí odkaz: https://doaj.org/article/0f5be9fd017247ec9b782799a6bd46a9

Optimized modeling of Gaia-Hipparcos astrometry for the detection of the smallest cold Jupiter and confirmation of seven low mass companions

Autor: R. Paul Butler, Mark W. Phillips, Hugh R. A. Jones, Alan P. Boss, J. Burt, Bradford P. Holden, Steven S. Vogt, Rebecca Oppenheimer, Fabo Feng

To fully constrain the orbits of low mass circumstellar companions, we conduct combined analyses of the radial velocity data as well as the Gaia and Hipparcos astrometric data for eight nearby systems. Our study shows that companion-induced position

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::723ca2695b47a8d8a40024f951f90000
http://arxiv.org/abs/2107.14056

Possible Implications of Relatively High Levels of Initial 60Fe in Iron Meteorites for the Noncarbonaceous–Carbonaceous Meteorite Dichotomy and Solar Nebula Formation

Autor: Alan P. Boss

Publikováno v: The Astrophysical Journal. 933:1

Cook et al. (2021) found that iron meteorites have an initial abundance ratio of the short-lived isotope $^{60}$Fe to the stable isotope $^{56}$Fe of $^{60}$Fe/$^{56}$Fe $\sim$ $(6.4 \pm 2.0) \times 10^{-7}$. This appears to require the injection of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a2705a741d4046289757a26fd043add
https://doi.org/10.3847/1538-4357/ac6609

The Occurrence of Rocky Habitable-zone Planets around Solar-like Stars from Kepler Data

Autor: Savita Mathur, Daniel Huber, Jennifer R. Campbell, Megan Shabram, Janice Voss, Jeffrey L. Coughlin, Guillermo Torres, Edward W. Dunham, Bruce D. Clarke, Laurance R. Doyle, Susan E. Mullally, Alan P. Boss, John Troeltzsch, Michael R. Haas, Jeffrey Van Cleve, Andrej Prsa, D. T. Sanderfer, Jeffrey C. Smith, Steve Bryson, Lauren M. Weiss, Christopher E. Henze, William F. Welsh, Elisa V. Quintana, Timothy D. Morton, Avi Shporer, Ravi Kumar Kopparapu, Fergal Mullally, Andrea K. Dupree, Jeffery J. Kolodziejczak, Joseph Catanzarite, Eric B. Ford, Solange V. Ramirez, Forrest R. Girouard, Michael Endl, Dimitar Sasselov, Christopher K. Middour, Travis A. Berger, William D. Cochran, Jørgen Christensen-Dalsgaard, Jessie L. Dotson, James L. Fanson, Natalie M. Batalha, Alan Gould, Christopher Allen, K. Larson, Jie Li, Jon M. Jenkins, Jason H. Steffen, Thomas N. Gautier, John C. Geary, Hema Chandrasekaran, Shawn Seader, Douglas A. Caldwell, Maura Fujieh, Lars A. Buchhave, Victor Silva Aguirre, Robert L. Morris, William J. Borucki, Joseph D. Twicken, David R. Ciardi, David W. Latham, Ronald L. Gilliland, Michelle Kunimoto, Steve B. Howell, Soren Meibom, Hans Kjeldsen, Andrew W. Howard, Khadeejah A. Zamudio, Darin Ragozzine, B. Wohler, William J. Chaplin, Jessie L. Christiansen, D. Pletcher, Samuel N. Quinn, Roger C. Hunter, Matthew J. Holman, Martin Still, Christopher J. Burke, David G. Koch, Geert Barentsen, Eduardo Seperuelo Duarte, Akm Kamal Uddin

Publikováno v: Bryson, S, Kunimoto, M, Kopparapu, R K, Coughlin, J L, Borucki, W J, Koch, D, Aguirre, V S, Allen, C, Barentsen, G, Batalha, N M, Berger, T, Boss, A, Buchhave, L A, Burke, C J, Caldwell, D A, Campbell, J R, Catanzarite, J, Chandrasekaran, H, Chaplin, W J, Christiansen, J L, Christensen-Dalsgaard, J R, Ciardi, D R, Clarke, B D, Cochran, W D, Dotson, J L, Doyle, L R, Duarte, E S, Dunham, E W, Dupree, A K, Endl, M, Fanson, J L, Ford, E B, Fujieh, M, Gautier, T N, Geary, J C, Gilliland, R L, Girouard, F R, Gould, A, Haas, M R, Henze, C E, Holman, M J, Howard, A W, Howell, S B, Huber, D, Hunter, R C, Jenkins, J M, Kjeldsen, H, Kolodziejczak, J, Larson, K, Latham, D W, Li, J, Mathur, S, Meibom, S R, Middour, C, Morris, R L, Morton, T D, Mullally, F, Mullally, S E, Pletcher, D, Prsa, A, Quinn, S N, Quintana, E V, Ragozzine, D, Ramirez, S V, Sanderfer, D T, Sasselov, D, Seader, S E, Shabram, M, Shporer, A, Smith, J C, Steffen, J H, Still, M, Torres, G, Troeltzsch, J, Twicken, J D, Uddin, A K, Van Cleve, J E, Voss, J, Weiss, L M, Welsh, W F, Wohler, B & Zamudio, K A 2021, ' The Occurrence of Rocky Habitable-zone Planets around Solar-like Stars from Kepler Data ', Astronomical Journal, vol. 161, no. 1, 36 . https://doi.org/10.3847/1538-3881/abc418
Bryson, S, Kunimoto, M, Kopparapu, R K, Coughlin, J L, Borucki, W J, Koch, D, Aguirre, V S, Allen, C, Barentsen, G, Batalha, N M, Berger, T, Boss, A, Buchhave, L A, Burke, C J, Caldwell, D A, Campbell, J R, Catanzarite, J, Chandrasekaran, H, Chaplin, W J, Christiansen, J L, Christensen-Dalsgaard, J, Ciardi, D R, Clarke, B D, Cochran, W D, Dotson, J L, Doyle, L R, Duarte, E S, Dunham, E W, Dupree, A K, Endl, M, Fanson, J L, Ford, E B, Fujieh, M, III, T N G, Geary, J C, Gilliland, R L, Girouard, F R, Gould, A, Haas, M R, Henze, C E, Holman, M J, Howard, A W, Howell, S B, Huber, D, Hunter, R C, Jenkins, J M, Kjeldsen, H, Kolodziejczak, J, Larson, K, Latham, D W, Li, J, Mathur, S, Meibom, S, Middour, C, Morris, R L, Morton, T D, Mullally, F, Mullally, S E, Pletcher, D, Prsa, A, Quinn, S N, Quintana, E V, Ragozzine, D, Ramirez, S V, Sanderfer, D T, Sasselov, D, Seader, S E, Shabram, M, Shporer, A, Smith, J C, Steffen, J H, Still, M, Torres, G, Troeltzsch, J, Twicken, J D, Uddin, A K, Cleve, J E V, Voss, J, Weiss, L M, Welsh, W F, Wohler, B & Zamudio, K A 2021, ' The Occurrence of Rocky Habitable-zone Planets around Solar-like Stars from Kepler Data ', Astronomical Journal, vol. 161, no. 1, 36 . https://doi.org/10.3847/1538-3881/abc418

We present occurrence rates for rocky planets in the habitable zones (HZ) of main-sequence dwarf stars based on the Kepler DR25 planet candidate catalog and Gaia-based stellar properties. We provide the first analysis in terms of star-dependent inste

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b314675cefdbc12585774f8511eb0c8
https://doi.org/10.3847/1538-3881/abc418

Triggering Collapse of the Presolar Dense Cloud Core and Injecting Short-Lived Radioisotopes with a Shock Wave. VI. Protostar and Protoplanetary Disk Formation

Autor: Alan P. Boss

Cosmochemical evaluations of the initial meteoritical abundance of the short-lived radioisotope (SLRI) $^{26}$Al have remained fairly constant since 1976, while estimates for the initial abundance of the SLRI $^{60}$Fe have varied widely recently. At

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f5a2014120e7dc3d9955d88c37f5fba
http://arxiv.org/abs/1811.05033