The DOI matches its Crossref record; 64 of the 64 references it cites were found in a registry or an index.
A CORRELATION BETWEEN STELLAR ACTIVITY AND HOT JUPITER EMISSION SPECTRA
Open accessAbstract
We present evidence for a correlation between the observed properties of hot Jupiter emission spectra and the activity levels of the host stars measured using Ca ii H & K emission lines. We find that planets with dayside emission spectra that are well-described by standard one-dimensional atmosphere models with water in absorption (HD 189733, TrES-1, TrES-3, WASP-4) orbit chromospherically active stars, while planets with emission spectra that are consistent with the presence of a strong high-altitude temperature inversion and water in emission orbit quieter stars. We estimate that active G and K stars have Lyman α fluxes that are typically a factor of 4–7 times higher than quiet stars with analogous spectral types and propose that the increased UV flux received by planets orbiting active stars destroys the compounds responsible for the formation of the observed temperature inversions. In this paper, we also derive a model-independent method for differentiating between these two atmosphere types using the secondary eclipse depths measured in the 3.6 and 4.5 μm bands on the Spitzer Space Telescope and argue that the observed correlation is independent of the inverted/non-inverted paradigm for classifying hot Jupiter atmospheres.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Rotation, convection, and magnetic activity in lower main-sequence stars
Noyes, R. W., Hartmann, L. W., Baliunas, S. L., Duncan, D. K., & Vaughan, A. H. (1984) · The Astrophysical Journal · doi:10.1086/161945 · Cited by 1,708
The Planet‐Metallicity Correlation
Fischer, D. A., & Valenti, J. (2005) · The Astrophysical Journal · doi:10.1086/428383 · Cited by 1,654
HIRES: the high-resolution echelle spectrometer on the Keck 10-m Telescope:
Vogt, S. S., Allen, S. L., Bigelow, B. C., Bresee, L., Brown, W. E., Cantrall, T., Conrad, A., Couture, M., Delaney, C., Epps, H. W., et al. (1994) · SPIE Proceedings · doi:10.1117/12.176725 · Cited by 1,606
The Observation and Analysis of Stellar Photospheres
Gray, D. F. (2005) · Cambridge University Press eBooks · doi:10.1017/cbo9781316036570 · Cited by 1,404
An extended upper atmosphere around the extrasolar planet HD209458b
Vidal-Madjar, A., des Etangs, A. L., Désert, J.-M., Ballester, G. E., Ferlet, R., Hébrard, G., & Mayor, M. (2003) · Nature · doi:10.1038/nature01448 · Cited by 1,208 · cited 1×
“…of the stellar UV fluxes are only available for a handful of systems, including HD 189733b (Lecavelier des Etangs et al. 2010) and HD 209458b (Vidal-Madjar et al. 2003, 2004; Ehrenreich et al. 2008; France et al. 2010; Linsky et al. 2010), while archival searches for X-ray detections…”
BackgroundHauschildt, P. H., Allard, F., & Baron, E. (1999) · The Astrophysical Journal · doi:10.1086/306745 · Cited by 1,207
Chromospheric variations in main-sequence stars
Baliunas, S. L., Donahue, R. A., Soon, W. H., Horne, J. H., Frazer, J., Woodard-Eklund, L., Bradford, M., Rao, L. M., Wilson, O. C., Zhang, Q., et al. (1995) · The Astrophysical Journal · doi:10.1086/175072 · Cited by 1,054
Fortney, J. J., Lodders, K., Marley, M. S., & Freedman, R. S. (2008) · The Astrophysical Journal · doi:10.1086/528370 · Cited by 811
Vidal-Madjar, A., Dsert, J.-M., Etangs, A. L. D., Hbrard, G., Ballester, G. E., Ehrenreich, D., Ferlet, R., McConnell, J. C., Mayor, M., & Parkinson, C. D. (2004) · The Astrophysical Journal · doi:10.1086/383347 · Cited by 654
Detection of Thermal Emission from an Extrasolar Planet
Charbonneau, D., Allen, L. E., Megeath, S. T., Torres, G., Alonso, R., Brown, T. M., Gilliland, R. L., Latham, D. W., Mandushev, G., O’Donovan, F. T., et al. (2005) · The Astrophysical Journal · doi:10.1086/429991 · Cited by 645
Cited by
A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
Sing, D. K., Fortney, J. J., Nikolov, N., Wakeford, H. R., Kataria, T., Evans, T. M., Aigrain, S., Ballester, G. E., Burrows, A. S., Deming, D., et al. (2016) · Nature · doi:10.1038/nature16068 · Cited by 964
Self-citationMoses, J. I., Visscher, C., Fortney, J. J., Showman, A. P., Lewis, N. K., Griffith, C. A., Klippenstein, S. J., Shabram, M., Friedson, A. J., Marley, M. S., et al. (2011) · The Astrophysical Journal · doi:10.1088/0004-637x/737/1/15 · Cited by 490
C/O RATIO AS A DIMENSION FOR CHARACTERIZING EXOPLANETARY ATMOSPHERES
Madhusudhan, N. (2012) · The Astrophysical Journal · doi:10.1088/0004-637x/758/1/36 · Cited by 465
Seager, S., & Deming, D. (2010) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-081309-130837 · Cited by 435
Line, M. R., Wolf, A. S., Zhang, X., Knutson, H., Kammer, J. A., Ellison, E., Deroo, P., Crisp, D., & Yung, Y. L. (2013) · The Astrophysical Journal · doi:10.1088/0004-637x/775/2/137 · Cited by 368
Self-citation
Metadata
- Authors
- Knutson, H. A., Howard, A. W., & Isaacson, H.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2010-08-23
- Volume
- 720
- Issue
- 2
- Pages
- 1569-1576
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2000334668
- Cited by
- 279
- References
- 64
- FWCI
- 20.79
- Type
- journal article
- Language
- en
- Open access
- bronze
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: A CORRELATION BETWEEN STELLAR ACTIVITY AND HOT JUPITER EMISSION SPECTRA. https://app.cochat.ai/papers/10.1088/0004-637x/720/2/1569
- The paper
- Knutson, H. A., Howard, A. W., & Isaacson, H. (2010). A CORRELATION BETWEEN STELLAR ACTIVITY AND HOT JUPITER EMISSION SPECTRA. The Astrophysical Journal. https://doi.org/10.1088/0004-637x/720/2/1569
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
