[en] Context. Debris discs have often been described as gas-poor discs as the gas-to-dust ratio is expected to be considerably lower than in primordial, protoplanetary discs. However, recent observations have confirmed the presence of a non-negligible amount of cold gas in the circumstellar (CS) debris discs around young main-sequence stars. This cold gas has been suggested to be related to the outgassing of planetesimals and cometary-like objects. <BR /> Aims: The goal of this paper is to investigate the presence of hot gas in the immediate surroundings of the cold-gas-bearing debris-disc central stars. <BR /> Methods: High-resolution optical spectra of all currently known cold-gas-bearing debris-disc systems, with the exception of β Pic and Fomalhaut, have been obtained from La Palma (Spain), La Silla (Chile), and La Luz (Mexico) observatories. To verify the presence of hot gas around the sample of stars, we have analysed the Ca II H&K and the Na I D lines searching for non-photospheric absorptions of CS origin, usually attributed to cometary-like activity. <BR /> Results: Narrow, stable Ca II and/or Na I absorption features have been detected superimposed to the photospheric lines in 10 out of the 15 observed cold-gas-bearing debris-disc stars. Features are found at the radial velocity of the stars, or slightly blue- or red-shifted, and/or at the velocity of the local interstellar medium (ISM). Some stars also present transient variable events or absorptions extended towards red wavelengths (red wings). These are the first detections of such Ca II features in 7 out of the 15 observed stars. Although an ISM origin cannot categorically be excluded, the results suggest that the stable and variable absorptions arise from relatively hot gas located in the CS close-in environment of the stars. This hot gas is detected in at least 80%, of edge-on cold-gas-bearing debris discs, while in only 10% of the discs seen close to face-on. We interpret this result as a geometrical effect, and suggest that the non-detection of hot gas absorptions in some face-on systems is due to the disc inclination and likely not to the absence of the hot-gas component. This gas is likely released in physical processes related in some way to the evaporation of exocomets, evaporation of dust grains, or grain-grain collisions close to the central star. The reduced spectra are only available at the CDS (ascii files) and at the FEROS archive (FITS files) via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://130.79.128.5">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/614/A3">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/614/A3</A>
Research Center/Unit :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Rebollido, I.; Departamento. Física Teórica, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain
Eiroa, C.; Departamento. Física Teórica, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain
Montesinos, B.; Centro de Astrobiología (CAB, CSIC-INTA), ESAC Campus, Camino Bajo del Castillo s/n, Villanueva de la Cañada, 28692, Madrid, Spain
Maldonado, J.; INAF, Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134, Palermo, Italy
Villaver, E.; Departamento. Física Teórica, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain
Absil, Olivier ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > ISSPSILAB
Bayo, A.; Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Casilla, 5030, Valparaíso, Chile ; Núcleo Milenio de Formación Planetaria-NPF, Universidad de Valparaíso, Av. Gran Bretaña, 1111, Valparaíso, Chile
Canovas, H.; Departamento. Física Teórica, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain ; European Space Astronomy Centre (ESA), PO Box 78, Villanueva de la Cañada, 28691, Madrid, Spain
Carmona, A.; Université de Toulouse, UPS-OMP, IRAP, 31400, Toulouse, France
Chen, Ch; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD, 21212, USA
Ertel, S.; Steward Observatory, Department of Astronomy, University of Arizona, Tucson, AZ, 85721, USA
Garufi, Antonio; Departamento. Física Teórica, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain
Iglesias, D. P.; Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Casilla, 5030, Valparaíso, Chile ; Núcleo Milenio de Formación Planetaria-NPF, Universidad de Valparaíso, Av. Gran Bretaña, 1111, Valparaíso, Chile
Liseau, R.; Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, 439 92, Onsala, Sweden
Meeus, G.; Departamento. Física Teórica, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain
Moór, A.; Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, PO Box 67, 1525, Budapest, Hungary
Mora, A.; Aurora Technology B.V. for ESA, ESA-ESAC, Villanueva de la Cañada, 28691, Madrid, Spain
Olofsson, J.; Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Casilla, 5030, Valparaíso, Chile ; Núcleo Milenio de Formación Planetaria-NPF, Universidad de Valparaíso, Av. Gran Bretaña, 1111, Valparaíso, Chile
Rauw, Grégor ; Université de Liège - ULiège > Groupe d'astrophysique des hautes énergies (GAPHE)
Riviere-Marichalar, P.; Instituto de Ciencia de Materiales de Madrid (CSIC), Calle Sor Juana Inés de la Cruz 3, 28049, Cantoblanco, Madrid, Spain)
scite shows how a scientific paper has been cited by providing the context of the citation, a classification describing whether it supports, mentions, or contrasts the cited claim, and a label indicating in which section the citation was made.
Bibliography
Acke, B., Min, M., Dominik, C., et al. 2012, A&A, 540, A125
Asensio-Torres, R., Janson, M., Hashimoto, J., et al. 2016, A&A, 593, A73
Backman, D. E., &Paresce, F. 1993, in Protostars and Planets III, eds. E. H. Levy &J. I. Lunine, 1253
Ballering, N. P., Rieke, G. H., Su, K. Y. L., &Montiel, E. 2013, ApJ, 775, 55
Ballering, N. P., Rieke, G. H., Su, K. Y. L., &Gáspár, A. 2017, ApJ, 845, 120
Bell, C. P. M., Mamajek, E. E., &Naylor, T. 2015, MNRAS, 454, 593
Beust, H., &Morbidelli, A. 2000, Icarus, 143, 170
Beust, H., Lagrange-Henri, A. M., Vidal-Madjar, A., &Ferlet, R. 1989, A&A, 223, 304
Beust, H., Vidal-Madjar, A., Ferlet, R., &Lagrange-Henri, A. M. 1990, A&A, 236, 202
Beust, H., Vidal-Madjar, A., &Ferlet, R. 1991, A&A, 247, 505
Beust, H., Lagrange, A.-M., Crawford, I. A., et al. 1998, A&A, 338, 1015
Brandeker, A. 2011, ApJ, 729, 122
Brandeker, A., Liseau, R., Olofsson, G., &Fridlund, M. 2004, A&A, 413, 681
Castelli, F., &Kurucz, R. L. 2004, ArXiv e-prints [arXiv:astro-ph/0405087]
Cataldi, G., Brandeker, A., Olofsson, G., et al. 2014, A&A, 563, A66
Chen, C. H., &Jura, M. 2003, ApJ, 582, 443
Chen, C. H., Mittal, T., Kuchner, M., et al. 2014, ApJS, 211, 25
Marino, S., Wyatt, M. C., Panic, O., et al. 2017, MNRAS, 465, 2595
Matrà, L., Dent, W. R. F., Wyatt, M. C., et al. 2017, MNRAS, 464, 1415
Matthews, B. C., Krivov, A. V., Wyatt, M. C., Bryden, G., &Eiroa, C. 2014, Protostars and Planets VI, eds. H., Beuther, R. S., Klessen, C. P., Dullemond, &T., Henning (Tucson: Univ. of Arizona Press), 521
Melis, C., Zuckerman, B., Rhee, J. H., et al. 2013, ApJ, 778, 12
Montgomery, S. L., &Welsh, B. Y. 2012, PASP, 124, 1042
Moór, A., A&Acute;brahám, P., Juhász, A., et al. 2011, ApJ, 740, L7
Moór, A., Juhász, A., Kóspál, A&Acute;., et al. 2013, ApJ, 777, L25
Moór, A., Henning, T., Juhász, A., et al. 2015a, ApJ, 814, 42
Moór, A., Kóspál, A&Acute;., A&Acute;brahám, P., et al. 2015b, MNRAS, 447, 577
Moór, A., Curé, M., Kóspál, A&Acute;., et al. 2017, ApJ, 849, 123
Neuhäuser, R., Ginski, C., Schmidt, T. O. B., &Mugrauer, M. 2011, MNRAS, 416, 1430
Olofsson, G., Liseau, R., &Brandeker, A. 2001, ApJ, 563, L77
Pecaut, M. J., &Mamajek, E. E. 2016, MNRAS, 461, 794
Pecaut, M. J., Mamajek, E. E., &Bubar, E. J. 2012, ApJ, 746, 154
Pöppel, W. G. L., Bajaja, E., Arnal, E. M., &Morras, R. 2010, A&A, 512, A83
Rappaport, S., Vanderburg, A., Jacobs, T., et al. 2018, MNRAS, 474, 1453
Raskin, G., van Winckel, H., Hensberge, H., et al. 2011, A&A, 526, A69
Redfield, S., &Linsky, J. L. 2002, ApJS, 139, 439
Redfield, S., &Linsky, J. L. 2008, ApJ, 673, 283
Redfield, S., Kessler-Silacci, J. E., &Cieza, L. A. 2007, ApJ, 661, 944
Riviere-Marichalar, P., Barrado, D., Augereau, J.-C., et al. 2012, A&A, 546, L8
Riviere-Marichalar, P., Barrado, D., Montesinos, B., et al. 2014, A&A, 565, A68
Roberge, A., &Weinberger, A. J. 2008, ApJ, 676, 509
Roberge, A., Feldman, P. D., Lagrange, A. M., et al. 2000, ApJ, 538, 904
Roberge, A., Feldman, P. D., Weinberger, A. J., Deleuil, M., &Bouret, J.-C. 2006, Nature, 441, 724
Roberge, A., Kamp, I., Montesinos, B., et al. 2013, ApJ, 771, 69
Roberge, A., Welsh, B. Y., Kamp, I., Weinberger, A. J., &Grady, C. A. 2014, ApJ, 796, L11
Schmitt, J. H. M. M., Schröder, K.-P., Rauw, G., et al. 2014, Astron. Nachr., 335, 787
Schneider, G., Silverstone, M. D., &Hines, D. C. 2005, ApJ, 629, L117
Schneider, G., Grady, C. A., Hines, D. C., et al. 2014, AJ, 148, 59
Slettebak, A. 1975, ApJ, 197, 137
Smith, B. A., &Terrile, R. J. 1984, Science, 226, 1421
Smith, R., Churcher, L. J., Wyatt, M. C., Moerchen, M. M., &Telesco, C. M. 2009, A&A, 493, 299
Smith, R., Wyatt, M. C., &Haniff, C. A. 2012, MNRAS, 422, 2560
Telting, J. H., Avila, G., Buchhave, L., et al. 2014, Astron. Nachr., 335, 41
Thalmann, C., Janson, M., Buenzli, E., et al. 2013, ApJ, 763, L29
Thureau, N. D., Greaves, J. S., Matthews, B. C., et al. 2014, MNRAS, 445, 2558
Torres, C. A. O., Quast, G. R., Melo, C. H. F., &Sterzik, M. F. 2008, Young Nearby Loose Associations, ed. B. Reipurth, 757
van Dishoeck, E. F., &Black, J. H. 1988, ApJ, 334, 771
van Leeuwen F. 2007, A&A, 474, 653
Vidal-Madjar, A., Lagrange-Henri, A.-M., Feldman, P. D., et al. 1994, A&A, 290, 245
Vidal-Madjar, A., Kiefer, F., Lecavelier des Etangs, A., et al. 2017, A&A, 607, A25
Welsh, B. Y., &Montgomery, S. L. 2015, Adv. Astron., 2015, 980323
Welsh, B. Y., &Montgomery, S. L. 2018, MNRAS, 474, 1515
Welsh, B. Y., Lallement, R., Vergely, J.-L., &Raimond, S. 2010, A&A, 510, A54
Wenger, M., Ochsenbein, F., Egret, D., et al. 2000, A&AS, 143, 9
Wyatt, M. C. 2008, ARA&A, 46, 339
Zuckerman, B., Forveille, T., &Kastner, J. H. 1995, Nature, 373, 494
Similar publications
Sorry the service is unavailable at the moment. Please try again later.
This website uses cookies to improve user experience. Read more
Save & Close
Accept all
Decline all
Show detailsHide details
Cookie declaration
About cookies
Strictly necessary
Performance
Strictly necessary cookies allow core website functionality such as user login and account management. The website cannot be used properly without strictly necessary cookies.
This cookie is used by Cookie-Script.com service to remember visitor cookie consent preferences. It is necessary for Cookie-Script.com cookie banner to work properly.
Performance cookies are used to see how visitors use the website, eg. analytics cookies. Those cookies cannot be used to directly identify a certain visitor.
Used to store the attribution information, the referrer initially used to visit the website
Cookies are small text files that are placed on your computer by websites that you visit. Websites use cookies to help users navigate efficiently and perform certain functions. Cookies that are required for the website to operate properly are allowed to be set without your permission. All other cookies need to be approved before they can be set in the browser.
You can change your consent to cookie usage at any time on our Privacy Policy page.