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| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| Accès en ligne: | https://arxiv.org/abs/2501.14355 |
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| author | Armstrong, David J. Osborn, Ares Burn, Remo Venturini, Julia Adibekyan, Vardan Bonfanti, Andrea Burt, Jennifer A. Collins, Karen A. Mena, Elisa Delgado Hadjigeorghiou, Andreas Howell, Steve Quinn, Sam Sousa, Sergio G. Keniger, Marcelo Aron F. Barrado, David Barros, Susana C. C. Bayliss, Daniel Bouchy, François Castro-González, Amadeo Collins, Kevin I. Conti, Denis M. Crossfield, Ian M. Diaz, Rodrigo Dumusque, Xavier Feng, Fabo Lester, Kathryn V. Box, Jorge Lillo- Matson, Rachel A. Matthews, Elisabeth C. Mordasini, Christoph Murgas, Felipe Osborn, Hugh P. Palle, Enric Santos, Nuno Schwarz, Richard P. Silva, Tomás Azevedo Stassun, Keivan Strøm, Paul Tan, Thiam-Guan Teske, Johanna Wang, Gavin Wheatley, Peter J. |
| author_facet | Armstrong, David J. Osborn, Ares Burn, Remo Venturini, Julia Adibekyan, Vardan Bonfanti, Andrea Burt, Jennifer A. Collins, Karen A. Mena, Elisa Delgado Hadjigeorghiou, Andreas Howell, Steve Quinn, Sam Sousa, Sergio G. Keniger, Marcelo Aron F. Barrado, David Barros, Susana C. C. Bayliss, Daniel Bouchy, François Castro-González, Amadeo Collins, Kevin I. Conti, Denis M. Crossfield, Ian M. Diaz, Rodrigo Dumusque, Xavier Feng, Fabo Lester, Kathryn V. Box, Jorge Lillo- Matson, Rachel A. Matthews, Elisabeth C. Mordasini, Christoph Murgas, Felipe Osborn, Hugh P. Palle, Enric Santos, Nuno Schwarz, Richard P. Silva, Tomás Azevedo Stassun, Keivan Strøm, Paul Tan, Thiam-Guan Teske, Johanna Wang, Gavin Wheatley, Peter J. |
| contents | NCORES was a large observing program on the ESO HARPS spectrograph, dedicated to measuring the masses of Neptune-like and smaller transiting planets discovered by the TESS satellite using the radial velocity technique. This paper presents an overview of the programme, its scientific goals and published results, covering 35 planets in 18 planetary systems. We present spectrally derived stellar characterisation and mass constraints for five additional TOIs where radial velocity observations found only marginally significant signals (TOI-510.01, $M_p=1.08^{+0.58}_{-0.55}M_\oplus$), or found no signal (TOIs 271.01, 641.01, 697.01 and 745.01). A newly detected non-transiting radial velocity candidate is presented orbiting TOI-510 on a 10.0d orbit, with a minimum mass of $4.82^{+1.29}_{-1.26}M_\oplus$, although uncertainties on the system architecture and true orbital period remain. Combining the NCORES sample with archival known planets we investigate the distribution of planet masses and compositions around and below the radius gap, finding that the population of planets below the gap is consistent with a rocky composition and ranges up to a sharp cut-off at $10M_\oplus$. We compare the observed distribution to models of pebble- and planetesimal-driven formation and evolution, finding good broad agreement with both models while highlighting interesting areas of potential discrepancy. Increased numbers of precisely measured planet masses in this parameter space are required to distinguish between pebble and planetesimal accretion. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_14355 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The NCORES Program: Precise planetary masses, null results, and insight into the planet mass distribution near the radius gap Armstrong, David J. Osborn, Ares Burn, Remo Venturini, Julia Adibekyan, Vardan Bonfanti, Andrea Burt, Jennifer A. Collins, Karen A. Mena, Elisa Delgado Hadjigeorghiou, Andreas Howell, Steve Quinn, Sam Sousa, Sergio G. Keniger, Marcelo Aron F. Barrado, David Barros, Susana C. C. Bayliss, Daniel Bouchy, François Castro-González, Amadeo Collins, Kevin I. Conti, Denis M. Crossfield, Ian M. Diaz, Rodrigo Dumusque, Xavier Feng, Fabo Lester, Kathryn V. Box, Jorge Lillo- Matson, Rachel A. Matthews, Elisabeth C. Mordasini, Christoph Murgas, Felipe Osborn, Hugh P. Palle, Enric Santos, Nuno Schwarz, Richard P. Silva, Tomás Azevedo Stassun, Keivan Strøm, Paul Tan, Thiam-Guan Teske, Johanna Wang, Gavin Wheatley, Peter J. Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics NCORES was a large observing program on the ESO HARPS spectrograph, dedicated to measuring the masses of Neptune-like and smaller transiting planets discovered by the TESS satellite using the radial velocity technique. This paper presents an overview of the programme, its scientific goals and published results, covering 35 planets in 18 planetary systems. We present spectrally derived stellar characterisation and mass constraints for five additional TOIs where radial velocity observations found only marginally significant signals (TOI-510.01, $M_p=1.08^{+0.58}_{-0.55}M_\oplus$), or found no signal (TOIs 271.01, 641.01, 697.01 and 745.01). A newly detected non-transiting radial velocity candidate is presented orbiting TOI-510 on a 10.0d orbit, with a minimum mass of $4.82^{+1.29}_{-1.26}M_\oplus$, although uncertainties on the system architecture and true orbital period remain. Combining the NCORES sample with archival known planets we investigate the distribution of planet masses and compositions around and below the radius gap, finding that the population of planets below the gap is consistent with a rocky composition and ranges up to a sharp cut-off at $10M_\oplus$. We compare the observed distribution to models of pebble- and planetesimal-driven formation and evolution, finding good broad agreement with both models while highlighting interesting areas of potential discrepancy. Increased numbers of precisely measured planet masses in this parameter space are required to distinguish between pebble and planetesimal accretion. |
| title | The NCORES Program: Precise planetary masses, null results, and insight into the planet mass distribution near the radius gap |
| topic | Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2501.14355 |