List of transiting circumsecondary disks
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{{Use dmy dates |date=August 2024}}
This is a list of binary systems that have a primary star eclipsed, as seen from Earth, by a circumstellar disk around the secondary (including possible ring systems). A circumsecondary disk is a disk of gas and/or dust around a star, white dwarf or substellar object that is a secondary in a star system. In rare cases the system can be aligned in a way that makes it possible for the circumsecondary disk to transit in front of the primary. In some cases the observed dips can be so deep that researchers describe these dimming events as occultations.
The object J1407b was considered a circumsecondary disk in the past, but later turned out to be more likely a free-floating planetary-mass object with a disk. PDS 110 is a candidate with uncertain status, as later eclipses did not occur. VVV-WIT-07, ASASSN-V J192543.72+402619.0, ASASSN-21co, FY Scuti, OGLE-BLG182.1.162852, and ZTF J185259.31+124955.2 are candidates without much modelling of the disk.
List of transiting disks
| class="wikitable"
|+ !Name of the primary !Spectral type primary !Secondary object classification !Orbital separation (AU) !Orbital period (years) !Disk radius (AU) !Reference |
| colspan="7" |Giant stars with possible mass transfer to the secondary in the past |
|---|
| AS Leonis Minoris (TYC 2505-672-1)
|M2III |16.7–31.2 or 26.7 |69.1 |0.85–3.15 or 3.75 |
| Epsilon Aurigae
|F0II–III? |{{Val|18.1|1.2|1.3}} |27.1 |{{Val|3.8|0.1|0.4}} |
| VVV-WIT-08
|giant between K7 and M2 |object of unknown nature | |>11 |>0.25 |
| Eta Geminorum
|M3.5 Ib-II |star (about 2 {{Solar mass|link=true}}) |7.8 |8.2 |>0.75 |
| Gaia17bpp
|M0III |star | |>6.5 |1.4 |
| EE Cephei
|B5III (Be star) |star | |5.6 |0.13 |
| OGLE LMC-ECL-11893
|B9III: (Be star) |old low-mass object |1.7 |1.3 |0.2 |
| MWC 882
|A0 (accretor, post-Algol variable) |B7 (donor, post-RGB) |0.53 |0.20 |0.28 (around primary) |
| colspan="7" |Young systems (secondary is star) |
| V773 Tauri
|binary: K3Ve (Li) |binary star (two 1.5 {{Solar mass}} stars) |{{Val|15.35|0.45}} |26.5 |5 |
| colspan="7" |Secondary possibly substellar object or planet |
| ASASSN-21js
|early-type star |substellar object (brown dwarf or smaller) |~13,000 |~610,000 |1.055 |
| Gaia21bcv
|K4.5V (young star) |low-mass star, brown dwarf or planet |<225 |<3375 |0.5 |
| ASASSN-V J060000.76–310027.83
|early K-dwarf |object of unknown nature | |~82 |~0.5 |
| EPIC 204376071
|M5.3 (young star) |about 3 {{Jupiter mass|link=true}} object | |>0.22 |0.012 (2.60 {{Solar radius|link=true}}) |
| V928 Tauri
|M0.8 (young binary) |substellar object with high mass (at least >50 {{Jupiter mass}}) |<3.2 |0.18–2.8 |0.006 (1.39 {{Solar radius}}) |
| EPIC 220208795
|early K-dwarf |>1.5 {{Jupiter mass}} object |1.20–1.44 (aphelion) |0.65–0.80 |0.005 (1.14 {{Solar radius}}) |
| KIC 10403228
|M |0.88 or 1.44 {{Jupiter radius|link=true}} object | |450 |0.0012 or 0.0017 (2.6 or 3.7 {{Jupiter radius}}) |
| style="background:#69db6f;"
|Sun |G2V |Saturn (planet; included for comparison) |{{convert|1433.53|e6km|AU|4|disp=out}} |29.4475 |{{convert|136,780|km|AU|5|disp=out}}{{efn|Outer edge of Saturn's A ring.}} |
| HIP 41378
|late F-type star |HIP 41378 f (12 {{Earth mass|link=true}} planet, with radius of 3.7 {{Earth radius|link=true}} if it has rings) |1.37 |1.49 |0.0004 (9.6 {{Earth radius}}) |
| K2-33
|M dwarf (young star) |K2-33b (planet) |0.0409 |0.015 (5.424 days) |0.0002 (5 {{Earth radius}}) |
See also
Notes
{{Noteslist}}
References
{{reflist |refs=
{{Cite book |last=Zombeck |first=Martin V. |url=http://ads.harvard.edu/books/hsaa/ |title=Handbook of Space Astronomy and Astrophysics 2nd edition |year=1990 |publisher=Cambridge University Press |access-date=13 January 2016 |archive-url=https://web.archive.org/web/20210203012304/http://ads.harvard.edu/books/hsaa/ |archive-date=3 February 2021 |url-status=live}}
}}