干旱区生态环境知识资源中心(Arid): The key impact of the host star's rotational history on the evolution of TOI-849b

Arid

DOI	10.1051/0004-6361/202141734
	The key impact of the host star's rotational history on the evolution of TOI-849b
	Pezzotti, C.; Attia, O.; Eggenberger, P.; Buldgen, G.; Bourrier, V
通讯作者	Pezzotti, C (corresponding author), Univ Geneva, Observ Geneve, Chemin Pegasi 51, CH-1290 Sauverny, Switzerland.
来源期刊	ASTRONOMY & ASTROPHYSICS
ISSN	0004-6361
EISSN	1432-0746
出版年	2021
卷号	654
英文摘要	Context. TOI-849b is one of the few planets populating the hot-Neptune desert and it is the densest Neptune-sized one discovered so far. Its extraordinary proximity to the host star, together with the absence of a massive H/He envelope on top of the 40.8 M-circle plus rocky core, calls into question the role played by the host star in the evolution of the system. Aims. We aim to study the impact of the host star's rotational history on the evolution of TOI-849b, particularly focussing on the planetary migration due to dynamical tides dissipated in the stellar convective envelope, and on the high-energy stellar emission. Methods. Rotating stellar models of TOI-849 are coupled to our orbital evolution code to study the evolution of the planetary orbit. The evolution of the planetary atmosphere is studied by means of the JADE code, which uses realistic X-ray and extreme-ultraviolet (XUV) fluxes provided by our rotating stellar models. Results. Assuming that the planet was at its present-day position (a(in) = 0.01598 AU) at the protoplanetary disc dispersal, with mass 40.8 M-circle plus, and considering a broad range of host star initial surface rotation rates (Omega(in) is an element of [3.2, 18] Omega(circle dot)), we find that only for Omega(in) <= 5 Omega(circle dot) do we reproduce the current position of the planet, given that for Omega(in) > 5 Omega(circle dot) its orbit is efficiently deflected by dynamical tides within the first similar to 40 Myr of evolution. We also simulated the evolution of the orbit for values of a(in) not equal 0.01598 AU for each of the considered rotational histories, confirming that the only combination suited to reproduce the current position of the planet is given by a(in) = 0.01598 AU and Omega(in) <= 5 Omega(circle dot). We tested the impact of increasing the initial mass of the planet on the efficiency of tides, finding that a higher initial mass (M-in = 1 M-Jup) does not change the results reported above. Based on these results we computed the evolution of the planetary atmospheres with the JADE code for a large range of initial masses above a core mass of 40.8 M-circle plus, finding that the strong XUV-flux received by the planet is able to remove the entirety of the envelope within the first 50 Myr, even if it formed as a Jupiter-mass planet.
英文关键词	planet-star interactions planetary systems planets and satellites: atmospheres stars: evolution stars: rotation stars: solar-type
类型	Article
语种	英语
开放获取类型	Green Submitted, Bronze
收录类别	SCI-E
WOS记录号	WOS:000704826700005
WOS关键词	TIDAL DISSIPATION ; STELLAR PHOTOMETRY ; ATMOSPHERIC ESCAPE ; DYNAMICAL TIDE ; PLANETARY CORE ; MASS ; PHOTOEVAPORATION ; INSTABILITY ; EVAPORATION ; ORIGIN
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362621
作者单位	[Pezzotti, C.; Attia, O.; Eggenberger, P.; Buldgen, G.; Bourrier, V] Univ Geneva, Observ Geneve, Chemin Pegasi 51, CH-1290 Sauverny, Switzerland
推荐引用方式 GB/T 7714	Pezzotti, C.,Attia, O.,Eggenberger, P.,et al. The key impact of the host star's rotational history on the evolution of TOI-849b[J],2021,654.
APA	Pezzotti, C.,Attia, O.,Eggenberger, P.,Buldgen, G.,&Bourrier, V.(2021).The key impact of the host star's rotational history on the evolution of TOI-849b.ASTRONOMY & ASTROPHYSICS,654.
MLA	Pezzotti, C.,et al."The key impact of the host star's rotational history on the evolution of TOI-849b".ASTRONOMY & ASTROPHYSICS 654(2021).