Results 1 to 10 of about 7,469 (313)

Debris Disk Evolution around A Stars [PDF]

The Astrophysical Journal, 2006
We report 24 and/or 70 um measurements of ~160 A-type main-sequence stars using the Multiband Imaging Photometer for Spitzer (MIPS). Their ages range from 5 to 850 Myr based on estimates from the literature (cluster or moving group associations) or from the H-R diagram and isochrones. The thermal infrared excess is identified by comparing the deviation
K. Y. L. Su, G. H. Rieke, J. A. Stansberry, G. Bryden, K. R. Stapelfeldt, D. E. Trilling, J. Muzerolle, C. A. Beichman, A. Moro‐Martin, D. C. Hines, M. W. Werner   +10 more
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Signposts of Multiple Planets in Debris Disks [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractWe review the nearby debris disk structures revealed by multi-wavelength images from Spitzer and Herschel, and complemented with detailed spectral energy distribution modeling. Similar to the definition of habitable zones around stars, debris disk structures should be identified and characterized in terms of dust temperatures rather than ...
Kate Y. L. Su, G. H. Rieke
openalex   +3 more sources

A JWST MIRI MRS View of the η Tel Debris Disk and Its Brown Dwarf Companion

The Astrophysical Journal
We report JWST Mid-Infrared Instrument (MIRI) Medium Resolution Spectrograph (MRS) observations of the β Pic moving-group member, η Tel A, along with its brown dwarf binary companion, η Tel B.
Yiwei Chai, Christine H. Chen, Kadin Worthen, Alexis Li, Antranik A. Sefilian, William Balmer, Dean C. Hines, David R. Law, B. A. Sargent, Mark Wyatt, Cicero X. Lu, Marshall D. Perrin, Isabel Rebollido, Emily Rickman, G. C. Sloan   +14 more
doaj   +2 more sources

Polarization of Circumstellar Debris Disk Light Echoes

The Astronomical Journal
Light echoes of debris disks around active stars can reveal disk structure and composition even when disks are not spatially resolved. Unfortunately, distinguishing reflected light from quiescent starlight and unexpected post-peak flare structure is ...
Austin J. King, Benjamin C. Bromley, Preston W. Harris, Scott J. Kenyon   +3 more
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A Constraint on the Amount of Hydrogen from the CO Chemistry in Debris Disks

The Astrophysical Journal, 2023
The faint CO gases in debris disks are easily dissolved into C by UV irradiation, while CO can be reformed via reactions with hydrogen. The abundance ratio of C/CO could thus be a probe of the amount of hydrogen in the debris disks.
Kazunari Iwasaki, Hiroshi Kobayashi, Aya E. Higuchi, Yuri Aikawa   +3 more
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Debris Disks [PDF]

, 2021
To appear as a book chapter in "ExoFrontiers: Big questions in exoplanetary science", Ed. N Madhusudhan (Bristol: IOP Publishing Ltd) AAS-IOP ebooks https://iopscience.iop.org/bookListInfo/aas-iop ...
openaire   +2 more sources

BINARIES AMONG DEBRIS DISK STARS [PDF]

The Astrophysical Journal, 2012
We have gathered a sample of 112 main-sequence stars with known debris disks. We collected published information and performed adaptive optics observations at Lick Observatory to determine if these debris disks are associated with binary or multiple stars.
Rodríguez, David R., Zuckerman, B.
openaire   +3 more sources

Primordial or Secondary? Testing Models of Debris Disk Gas with ALMA

The Astrophysical Journal, 2023
The origin and evolution of gas in debris disks are still not well understood. Secondary gas production from cometary material or a primordial origin have been proposed.
Gianni Cataldi, Yuri Aikawa, Kazunari Iwasaki, Sebastian Marino, Alexis Brandeker, Antonio Hales, Thomas Henning, Aya E. Higuchi, A. Meredith Hughes, Markus Janson, Quentin Kral, Luca Matrà, Attila Moór, Göran Olofsson, Seth Redfield, Aki Roberge   +15 more
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A Primordial Origin for the Gas-rich Debris Disks around Intermediate-mass Stars

The Astrophysical Journal Letters, 2023
While most debris disks consist of dust with little or no gas, a fraction have significant amounts of gas detected via emission lines of CO, ionized carbon, and/or atomic oxygen.
Riouhei Nakatani, Neal J. Turner, Yasuhiro Hasegawa, Gianni Cataldi, Yuri Aikawa, Sebastián Marino, Hiroshi Kobayashi   +6 more
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Debris disks around stars in the NIKA2 era [PDF]

EPJ Web of Conferences, 2020
The new NIKA2 camera at the IRAM 30m radiotelescope was used to observe three known debris disks in order to constrain the SED of their dust emission in the millimeter wavelength domain.
Lestrade J.-F., Augereau J.-C., Booth M., Adam R., Ade P., André P., Andrianasolo A., Aussel H., Beelen A., Benoît A., Bideaud A., Bourrion O., Calvo M., Catalano A., Comis B., De Petris M., Désert F.-X., Doyle S., Driessen E.F.C., Gomez A., Goupy J., Holland W., Kéruzoré F., Kramer C., Ladjelate B., Lagache G., Leclercq S., Lefèvre C., Macías-Pérez J.F., Mauskopf P., Mayet F., Monfardini A., Perotto L., Pisano G., Ponthieu N., Revéret V., Ritacco A., Romero C., Roussel H., Ruppin F., Schuster K., Shu S., Sievers A., Thébault P., Tucker C., Zylka R.   +45 more
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