stars: formation; protoplanetary disks; instrumentation: high angular resolution; techniques: imaging spectroscopy; stars: individual: HD 142527; Astrophysics - Solar and Stellar Astrophysics; Astrophysics - Earth and Planetary Astrophysics
Abstract :
[en] <BR /> Aims: HD 142527 is one of the most frequently studied Herbig Ae/Be stars with a transitional disk that hosts a large cavity that is up to about 100 au in radius. For this reason, it has been included in the guaranteed time observation (GTO) SpHere INfrared survey for Exoplanets (SHINE) as part of the Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) at the Very Large Telescope (VLT) in order to search for low-mass companions that might explain the presence of the gap. SHINE is a large survey within about 600 young nearby stars are observed with SPHERE with the aim to constrain the occurrence and orbital properties of the giant planet population at large (> 5 au) orbital separation around young stars. <BR /> Methods: We used the IRDIFS observing mode of SPHERE (IRDIS short for infrared dual imaging and spectrograph plus IFS or integral field spectrograph) without any coronagraph in order to search for and characterize companions as close as 30 mas of the star. Furthermore, we present the first observations that ever used the sparse aperture mask (SAM) for SPHERE both in IRDIFS and IRDIFS_EXT modes. All the data were reduced using the dedicated SPHERE pipeline and dedicated algorithms that make use of the principal component analysis (PCA) and reference differential imaging (RDI) techniques. <BR /> Results: We detect the accreting low-mass companion HD 142527B at a separation of 73 mas (11.4 au) from the star. No other companions with mass greater than 10 M[SUB]J[/SUB] are visible in the field of view of IFS (̃100 au centered on the star) or in the IRDIS field of view (̃400 au centered on the star). Measurements from IFS, SAM IFS, and IRDIS suggest an M6 spectral type for HD 142527B, with an uncertainty of one spectral subtype, compatible with an object of M = 0.11 ± 0.06 M[SUB]☉[/SUB] and R = 0.15 ± 0.07 R[SUB]☉[/SUB]. The determination of the mass remains a challenge using contemporary evolutionary models, as they do not account for the energy input due to accretion from infalling material. We consider that the spectral type of the secondary may also be earlier than the type we derived from IFS spectra. From dynamical considerations, we further constrain the mass to 0.26[SUP]+0.16[/SUP][SUB]-0.14[/SUB] M[SUB]☉[/SUB], which is consistent with both our spectroscopic analysis and the values reported in the literature. Following previous methods, the lower and upper dynamical mass values correspond to a spectral type between M2.5 and M5.5 for the companion. By fitting the astrometric points, we find the following orbital parameters: a period of P = 35 - 137 yr; an inclination of i = 121 - 130°, a value of Ω = 124 - 135° for the longitude of node, and an 68% confidence interval of ̃18 - 57 au for the separation at periapsis. Eccentricity and time at periapsis passage exhibit two groups of values: ̃0.2-0.45 and ̃0.45-0.7 for e, and ̃2015-2020 and ̃2020-2022 for T[SUB]0[/SUB]. While these orbital parameters might at first suggest that HD 142527B is not the companion responsible for the outer disk truncation, a previous hydrodynamical analysis of this system showed that they are compatible with a companion that is able to produce the large cavity and other observed features. <P />Based on observations collected at the European Organisation for astronomical research in the southern emisphere under ESO programmes 095.C-0298, 096.C-0241, 097.C-0865 and 189.C-0209.The reduced images 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/622/A96">http://cdsarc.u-strasbg.fr/viz- bin/qcat?J/A+A/622/A96</A>
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Claudi, R.; INAF - Osservatorio Astronomico di Padova, Italy
Maire, Anne-Lise ; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Mesa, D.; INAF - Osservatorio Astronomico di Padova, Italy ; INCT, Universidad De Atacama, calle Copayapu 485, Copiapó, Atacama, Chile
Cheetham, A.; Geneva Observatory, University of Geneva, Chemin des Maillettes 51, 1290 Versoix, Switzerland
Fontanive, C.; INAF - Osservatorio Astronomico di Padova, Italy ; SUPA, Institute for Astronomy, The University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK
Gratton, R.; INAF - Osservatorio Astronomico di Padova, Italy
Zurlo, A.; Núcleo de Astronomia, Facultad de Ingeniería, Universidad Diego Portales, Av. Ejercito, Santiago, Chile ; Escuela de Ingeniería Industrial, Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejercito 441, Santiago, Chile ; Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Avenhaus, H.; ETH Zurich, Institute for Astronomy, Wolfgang-Pauli-Str. 27, 8093, Zurich, Switzerland ; Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile ; Millennium Nucleus "Protoplanetary Disk", Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile
Bhowmik, T.; LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
Biller, B.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany ; SUPA, Institute for Astronomy, The University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK
Boccaletti, A.; LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
Bonavita, M.; INAF - Osservatorio Astronomico di Padova, Italy ; SUPA, Institute for Astronomy, The University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK
Bonnefoy, M.; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Chauvin, G.; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France ; Unidad Mixta Internacional Franco-Chilena de Astronomia, CNRS/INSU UMI 3386 and Departemento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile
Delboulbé, A.; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Desidera, S.; INAF - Osservatorio Astronomico di Padova, Italy
D'Orazi, V.; INAF - Osservatorio Astronomico di Padova, Italy
Feautrier, P.; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Feldt, M.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Flammini Dotti, F.; INAF - Osservatorio Astronomico di Padova, Italy ; Xi'an Jiaotong-Liverpool University, department of Mathematical Sciences, 111 Ren'ai road, Suzhou Dushu Lake Higher Education town, Jiangsu Province, 215123, PR China
Girard, J. H.; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France ; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD, 21218, USA
Giro, E.; INAF - Osservatorio Astronomico di Padova, Italy
Janson, M.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany ; Department of Astronomy, Stockholm University, AlbaNova University Center, 106 91, Stockholm, Sweden
Hagelberg, J.; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Keppler, M.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Kopytova, T.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany ; Steward Observatory, The University of Arizona, Tucson, AZ, 85721, USA
Lacour, S.; LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
Lagrange, A.-M.; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Langlois, M.; Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France ; CRAL, UMR 5574, CNRS, Université de Lyon, École Normale Supérieure de Lyon, 46 allée d'Italie, 69364, Lyon Cedex 07, France
Lannier, J.; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Le Coroller, H.; Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Menard, F.; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Messina, S.; INAF-Catania Astrophysical Observatory, via S. Sofia, 78, 95123, Catania, Italy
Meyer, M.; ETH Zurich, Institute for Astronomy, Wolfgang-Pauli-Str. 27, 8093, Zurich, Switzerland ; Department of Astronomy, University of Michigan, 1085 S. University, Ann Arbor, MI, 48109, USA
Millward, M.; York Creek Observatory, Georgetown, 7253, TAS, Australia
Olofsson, J.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany ; Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Av. Gran Bretaña 1111, Playa Ancha, Valparaíso, Chile ; Núcleo Milenio Formación Planetaria - NPF, Universidad de Valparaíso, Av. Gran Bretaña 1111, Valparaíso, Chile
Pavlov, A.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Peretti, S.; Geneva Observatory, University of Geneva, Chemin des Maillettes 51, 1290 Versoix, Switzerland
Perrot, C.; LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
Pinte, C.; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France ; Monash Centre for Astrophysics (MoCA) and School of Physivs and Astronomy Monash University, Clayton, Vic, 3800, Australia
Pragt, J.; NOVA Optical Infrared Instrumentation Group, Oude Hoogeveensedijk 4, 7991 PD, Dwingeloo, The Netherlands
Ramos, J.; Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Rochat, S.; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Rodet, L.; Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Roelfsema, R.; NOVA Optical Infrared Instrumentation Group, Oude Hoogeveensedijk 4, 7991 PD, Dwingeloo, The Netherlands
Rouan, D.; LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
Salter, G.; Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Schmidt, T.; LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
Sissa, E.; INAF - Osservatorio Astronomico di Padova, Italy
Thebault, P.; LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
Udry, S.; Geneva Observatory, University of Geneva, Chemin des Maillettes 51, 1290 Versoix, Switzerland
Vigan, A.; Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France)
Chauvin, G., Desidera, S., Lagrange, A. M., et al. 2017, in SF2A-2017: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics, eds. C. Reylé, P. Di Matteo, F. Herpin, et al., 331
Cheetham, A. C., Girard, J., Lacour, S., et al. 2016, Optical and Infrared Interferometry and Imaging V, Proc. SPIE, 9907, 99072T
Claudi, R. U., Turatto, M., Gratton, R. G., et al. 2008, in Ground-based and Airborne Instrumentation for Astronomy II, Proc. SPIE, 7014, 70143E
Claudi, R., Antichi, J., Baru-olo, A., et al. 2016, in Ground-based and Airborne Instrumentation for Astronomy VI, Proc. SPIE, 9908, 99083H
Close, L. M., Follette, K. B., Males, J. R., et al. 2014, ApJ, 781, L30
Cutri, R. M., Skrutskie, M. F., van Dyk, S., et al. 2003, VizieR Online Data Catalog: II/246
Delorme, P., Meunier, N., Albert, D., et al. 2017, in SF2A-2017: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics, eds. C. Reylé, P. Di Matteo, F. Herpin, et al., 347
Dodson-Robinson, S. E., & Salyk, C. 2011, ApJ, 738, 131
Dohlen, K., Langlois, M., Saisse, M., et al. 2008, in Ground-based and Airborne Instrumentation for Astronomy II, Proc. SPIE, 7014, 70143L
Dörr, M., Chini, R., Haas, M., Lemke, R., & Nürnberger, D. 2013, A&A, 553, A48
Eastman, J., Gaudi, B. S., & Agol, E. 2013, PASP, 125, 83
Espaillat, C., Muzerolle, J., Najita, J., et al. 2014, Protostars and Planets VI, 497
Esposito, S., Mesa, D., Skemer, A., et al. 2013, A&A, 549, A52
Fedele, D., Carney, M., Hogerheijde, M. R., et al. 2017, A&A, 600, A72
Foreman-Mackey, D., Hogg, D. W., Lang, D., & Goodman, J. 2013, PASP, 125, 306
Fukagawa, M., Tamura, M., Itoh, Y., et al. 2006, ApJ, 636, L153
Fukagawa, M., Tsukagoshi, T., Momose, M., et al. 2013, PASJ, 65, L14
Fusco, T., Sauvage, J.-F., Petit, C., et al. 2014, in Adaptive Optics Systems IV, Proc. SPIE, 9148, 91481U
Gaia Collaboration (Brown, A. G. A., et al.) 2016, A&A, 595, A2
Garcia Lopez, R., Natta, A., Testi, L., & Habart, E. 2006, A&A, 459, 837
Girard, T. M., van Altena, W. F., Zacharias, N., et al. 2011, AJ, 142, 15
Greenbaum, A. Z., Cheetham, A., Sivaramakrishnan, A., et al. 2014, in Groundbased and Airborne Instrumentation for Astronomy V, Proc. SPIE, 9147, 91477B
Henize, K. G. 1976, ApJS, 30, 491
Høg, E., Fabricius, C., Makarov, V. V., et al. 2000, A&A, 355, L27
Holman, M. J., & Wiegert, P. A. 1999, AJ, 117, 621
Houk, N. 1978, Michigan catalogue of two-dimensional spectral types for the HD stars (Ann Arbor: University of Michigan)
Hugot, E., Ferrari, M., El Hadi, K., et al. 2012, A&A, 538, A139
Jovanovic, N., Guyon, O., Lozi, J., et al. 2016, in Adaptive Optics Systems V, Proc. SPIE, 9909, 99090W
Kraus, A. L., & Ireland, M. J. 2012, ApJ, 745, 5
Kraus, A. L., Ireland, M. J., Martinache, F., & Lloyd, J. P. 2008, ApJ, 679, 762
Kurtz, D. W., & Müller, M. 2001, MNRAS, 325, 1341
Lacour, S., Biller, B., Cheetham, A., et al. 2016, A&A, 590, A90
Langlois, M., Vigan, A., Moutou, C., et al. 2013, in Proceedings of the Third AO4ELT Conference, eds. S. Esposito, & L. Fini, 63
Ligi, R., Vigan, A., Gratton, R., et al. 2018, MNRAS, 473, 1774
Macintosh, B. A., Anthony, A., Atwood, J., et al. 2014, in Adaptive Optics Systems IV, Proc. SPIE, 9148, 91480J
Maire, A. L., Langlois, M., Dohlen, K., et al. 2016, in Ground-based and Airborne Instrumentation for Astronomy VI, Proc. SPIE, 9908, 990834
Maire, A.-L., Skemer, A. J., Hinz, P. M., et al. 2015, A&A, 576, A133
Makarov, V. V., & Kaplan, G. H. 2005, AJ, 129, 2420
Malfait, K., Bogaert, E., & Waelkens, C. 1998, A&A, 331, 211
Malfait, K., Waelkens, C., Bouwman, J., et al. 1999, A&A, 345, 181