Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Joan R. Najita"'
Autor:
Stanley K. Jensen Jr., Sean D. Brittain, Andrea Banzatti, Joan R. Najita, John S. Carr, Joshua Kern, Janus Kozdon, Jonathan Zrake, Jeffrey Fung
Publikováno v:
The Astronomical Journal, Vol 167, Iss 3, p 115 (2024)
We present high-resolution spectra and spectroastrometric (SA) measurements of fundamental rovibrational CO emission from nine nearby (≲300 pc) protoplanetary disks where large inner dust cavities have been observed. The emission-line profiles and
Externí odkaz:
https://doaj.org/article/690d68b16a5e46d7809e73783c0b0ffe
Autor:
Chengyan Xie, Ilaria Pascucci, Feng Long, Klaus M. Pontoppidan, Andrea Banzatti, Anusha Kalyaan, Colette Salyk, Yao Liu, Joan R. Najita, Paola Pinilla, Nicole Arulanantham, Gregory J. Herczeg, John Carr, Edwin A. Bergin, Nicholas P. Ballering, Sebastiaan Krijt, Geoffrey A. Blake, Ke Zhang, Karin I. Öberg, Joel D. Green, the JDISCS collaboration
Publikováno v:
The Astrophysical Journal Letters, Vol 959, Iss 2, p L25 (2023)
We present an analysis of the JDISCS JWST/MIRI-MRS spectrum of Sz 114, an accreting M5 star surrounded by a large dust disk with a shallow gap at ∼39 au. The spectrum is molecule-rich; we report the detection of water, CO, CO _2 , HCN, C _2 H _2 ,
Externí odkaz:
https://doaj.org/article/eec4a68c8b8244d8a00e7ea02fbf42c7
Autor:
Andrea Banzatti, Klaus M. Pontoppidan, John S. Carr, Evan Jellison, Ilaria Pascucci, Joan R. Najita, Carlos E. Muñoz-Romero, Karin I. Öberg, Anusha Kalyaan, Paola Pinilla, Sebastiaan Krijt, Feng Long, Michiel Lambrechts, Giovanni Rosotti, Gregory J. Herczeg, Colette Salyk, Ke Zhang, Edwin A. Bergin, Nicholas P. Ballering, Michael R. Meyer, Simon Bruderer, The JDISCS Collaboration
Publikováno v:
The Astrophysical Journal Letters, Vol 957, Iss 2, p L22 (2023)
Previous analyses of mid-infrared water spectra from young protoplanetary disks observed with the Spitzer-IRS found an anticorrelation between water luminosity and the millimeter dust disk radius observed with ALMA. This trend was suggested to be evi
Externí odkaz:
https://doaj.org/article/d8affe53ce974ba98c7961ca36da0b0c
Rovibrational Spectroscopy of CI Tau—Evidence of a Multicomponent Eccentric Disk Induced by a Planet
Autor:
Janus Kozdon, Sean D. Brittain, Jeffrey Fung, Josh Kern, Stanley Jensen, John S. Carr, Joan R. Najita, Andrea Banzatti
Publikováno v:
The Astronomical Journal, Vol 166, Iss 3, p 119 (2023)
CI Tau is currently the only T Tauri star with an inner protoplanetary disk that hosts a planet, CI Tau b, that has been detected by a radial velocity survey. This provides the unique opportunity to study disk features that were imprinted by that pla
Externí odkaz:
https://doaj.org/article/f768283d4d034db8a98b5a9450634d4e
DESI Observations of the Andromeda Galaxy: Revealing the Immigration History of Our Nearest Neighbor
Autor:
Arjun Dey, Joan R. Najita, Sergey E. Koposov, J. Josephy-Zack, Gabriel Maxemin, Eric F. Bell, C. Poppett, E. Patel, L. Beraldo e Silva, A. Raichoor, D. Schlegel, D. Lang, A. Meisner, Adam D. Myers, J. Aguilar, S. Ahlen, C. Allende Prieto, D. Brooks, A. P. Cooper, K. S. Dawson, A. de la Macorra, P. Doel, A. Font-Ribera, Juan García-Bellido, S. Gontcho A Gontcho, J. Guy, K. Honscheid, R. Kehoe, T. Kisner, A. Kremin, M. Landriau, L. Le Guillou, Michael E. Levi, T. S. Li, Paul Martini, R. Miquel, J. Moustakas, Jundan Nie, N. Palanque-Delabrouille, F. Prada, E. F. Schlafly, Ray M. Sharples, Gregory Tarlé, Yuan-Sen Ting, L. Tyas, M. Valluri, Risa H. Wechsler, H. Zou
Publikováno v:
The Astrophysical Journal, Vol 944, Iss 1, p 1 (2023)
We present Dark Energy Spectroscopic Instrument (DESI) observations of the inner halo of M31, which reveal the kinematics of a recent merger—a galactic immigration event—in exquisite detail. Of the 11,416 sources studied in 3.75 hr of on-sky expo
Externí odkaz:
https://doaj.org/article/c8a9daeeaac744e2a9b5176bf99094f1
Autor:
Joan R. Najita, Scott J. Kenyon
Publikováno v:
The Astrophysical Journal, Vol 944, Iss 2, p 125 (2023)
The formation of planets like Earth is expected to conclude with a series of late-stage giant impacts that generate warm dusty debris, the most anticipated visible signpost of terrestrial planet formation in progress. While there is now evidence that
Externí odkaz:
https://doaj.org/article/98ee535c3830417991c348eb65403645
The similar orbital distances and detection rates of debris disks and the prominent rings observed in protoplanetary disks suggest a potential connection between these structures. We explore this connection with new calculations that follow the evolu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0331801d41d6720b69cc4658ad1cb6e
The high occurrence rates of spiral arms and large central clearings in protoplanetary disks, if interpreted as signposts of giant planets, indicate that gas giants form commonly as companions to young stars ($ 10$\, Myr) have yielded few successes.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7314e7345c477b324dab03672cc9723d
Autor:
David S. Doelman, Matthew A. Kenworthy, Daniel Apai, Jordan Stone, Ruobing Dong, Sean D. Brittain, Emily Mailhot, Kevin Wagner, Frans Snik, Miriam Keppler, Joan R. Najita, Alexander J. Bohn, Steve Ertel, Ryan Webster
Publikováno v:
The Astronomical Journal
The Astronomical Journal, 159(6), 252
The Astronomical Journal, 159(6), 252
Scattered light imaging has revealed nearly a dozen circumstellar disks around young Herbig Ae/Be stars$-$enabling studies of structures in the upper disk layers as potential signs of on-going planet formation. We present the first images of the disk
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed6b65b3e24a1f8cbd1d5154be7d9e89
Publikováno v:
The Astronomical Journal. 163:37
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86877e4425dcb4d3a679b0a0618e5b06
https://doi.org/10.3847/1538-3881/ac3418
https://doi.org/10.3847/1538-3881/ac3418