Skip navigation
  • INAF logo
  • Home
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects
  • Explore by
    • Research outputs
    • Researchers
    • Organization units
    • Projects
  • Login:
    • My DSpace
    • Receive email
      updates
    • Edit Account details
  • Italian
  • English

  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28905
Title: The GAPS Programme with HARPS-N at TNG. XVIII. Two new giant planets around the metal-poor stars HD 220197 and HD 233832
Authors: Barbato, D.
SOZZETTI, Alessandro 
BIAZZO, Katia 
Malavolta, Luca 
Santos, N. C.
Damasso, Mario 
LANZA, Antonino Francesco 
Pinamonti, Matteo 
AFFER, Laura 
BENATTI, SERENA 
BIGNAMINI, ANDREA 
BONOMO, ALDO STEFANO 
BORSA, Francesco 
Carleo, I.
CLAUDI, Riccardo 
COSENTINO, Rosario 
COVINO, Elvira 
DESIDERA, Silvano 
Esposito, M.
GIACOBBE, Paolo 
González-Álvarez, E.
GRATTON, Raffaele 
Harutyunyan, A.
LETO, Giuseppe 
MAGGIO, Antonio 
MALDONADO PRADO, Jesus 
Mancini, L.
Masiero, S.
MICELA, Giuseppina 
MOLINARI, Emilio Carlo 
NASCIMBENI, VALERIO 
PAGANO, Isabella 
Piotto, G.
PORETTI, Ennio 
RAINER, Monica 
SCANDARIATO, GAETANO 
SMAREGLIA, Riccardo 
Colombo, L. S.
Di Fabrizio, L.
Faria, J. P.
Martinez Fiorenzano, A.
MOLINARO, Marco 
Pedani, M.
Issue Date: 2019
Journal: ASTRONOMY & ASTROPHYSICS 
Number: 621
First Page: A110
Abstract: Context. Statistical studies of exoplanets have shown that giant planets are more commonly hosted by metal-rich dwarf stars than low-metallicity stars, while no such correlation is evident for lower mass planets. The search for giant planets around metal-poor stars and the estimate of their occurrence f<SUB>p</SUB> is an important element in providing support to models of planet formation. <BR /> Aims: We present results from the HARPS-N search for giant planets orbiting metal-poor (- 1.0 ≤[Fe/H] ≤-0.5 dex) stars in the northern hemisphere, complementing a previous HARPS survey on southern stars in order to update the estimate of f<SUB>p</SUB>. <BR /> Methods: High-precision HARPS-N observations of 42 metal-poor stars were used to search for planetary signals to be fitted using differential evolution Markov chain Monte Carlo single-Keplerian models. We then joined our detections to the results of the previous HARPS survey on 88 metal-poor stars to provide a preliminary estimate of the two-hemisphere f<SUB>p</SUB>. <BR /> Results: We report the detection of two new giant planets around HD 220197 and HD 233832. The first companion has Msin i = 0.20<SUB>-0.04</SUB><SUP>+0.07</SUP> M<SUB>Jup</SUB> and an orbital period of 1728<SUB>-80</SUB><SUP>+162</SUP> days, and for the second companion, we find two solutions of equal statistical weight with periods of 2058<SUB>-40</SUB><SUP>+47</SUP> and 4047<SUB>-117</SUB><SUP>+91</SUP> days and minimum masses of 1.78<SUB>-0.06</SUB><SUP>+0.08</SUP> and 2.72<SUB>-0.23</SUB><SUP>+0.23</SUP> M<SUB>Jup</SUB>, respectively. Joining our two detections with the three from the southern survey, we obtain a preliminary and conservative estimate of the global frequency of f<SUB>p</SUB> = 3.84 <SUB>-1.06</SUB><SUP>+2.45</SUP>% for giant planets around metal-poor stars. <BR /> Conclusions: The two new giant planets orbit dwarf stars at the metal-rich end of the HARPS-N metal-poor sample. This corroborates previous results that suggested that giant planet frequency is still a rising function of the host star [Fe/H]. We also note that all detections in the overall sample are giant long-period planets. <P />Based on observations made with the HARPS-N spectrograph on the Italian Telescopio Nazionale Galileo (TNG) operated on the island of La Palma (Spain) by the INAF - Fundación Galileo Galilei (Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias).RV data (Table 5) are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/621/A110">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/621/A110
URI: http://hdl.handle.net/20.500.12386/28905
URL: http://arxiv.org/abs/1811.07776v1
https://www.aanda.org/articles/aa/full_html/2019/01/aa34305-18/aa34305-18.html
ISSN: 0004-6361
DOI: 10.1051/0004-6361/201834305
Bibcode ADS: 2019A&A...621A.110B
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat 
Barbatoetal.2019.pdfPdf editoriale2.49 MBAdobe PDFView/Open
Show full item record

Page view(s)

5
checked on Jan 16, 2021

Download(s)

2
checked on Jan 16, 2021

Google ScholarTM

Check

Altmetric


Items in DSpace are published in Open Access, unless otherwise indicated.


Explore by
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects

Informazioni e guide per autori

https://openaccess-info.inaf.it: tutte le informazioni sull'accesso aperto in INAF

Come si inserisce un prodotto: le guide a OA@INAF

La Policy INAF sull'accesso aperto

Documenti e modelli scaricabili

Feedback
Built with DSpace-CRIS - Extension maintained and optimized by Logo 4SCIENCE