Effects of Substellar Companions on Stellar Evolution
Funded by NSF AST #1812874
Relevant Works
- Corcoran, K.A., Barlow, B.N., Schaffenroth, V., Heber, U., Walser, S., Irrgang, A., 2021, ApJ, 918, 28.
- Ratzloff, J.K., Barlow, B.N., Nemeth, P., Corbett, H.T., Walser, S.*, et al., 2020, ApJ, 890, 126.
- Schaffenroth, Barlow, Geier, Vuckovic, et al. 2019, A&A, 630, A80.
- Schaffenroth, Barlow, Geier, Vuckvovic, et al., 2017, OA, 26, 208
- Catalan-Hurtado, Barlow, and the EREBOS Team, 2016, AAS Meeting #227 Abstracts, 345..14
- Barlow, Catalan-Hurtado, Schaffenroth, and the EREBOS team, 2016, AAS Meeting #227 Abstracts, 404.04
The first totally-eclipsing HW Vir found, which was discovered by Kyle Corcoran and Stephen Walser.
RV semi-amplitudes of known sdB binaries with red/brown dwarf companions (blue = eclipsing; red = not) plotted against their periods. No systems are seen in the bottom-left, as their companions probably merged with the primary or evaporated. From Schaffenroth et al. 2018.
RV semi-amplitudes of known sdB binaries with red/brown dwarf companions (blue = eclipsing; red = not) plotted against their periods. No systems are seen in the bottom-left, as their companions probably merged with the primary or evaporated. From Schaffenroth et al. 2018.
SN Ia Progenitors and Gravitational Wave Sources
Relevant Works
- Pelisoli, I., Geier, S., Kupfer, T., Heber, U., Irrgang, A., Schneider, D., Bastian, A., van Roestel, J., Schaffenroth, V., Barlow, B.N., 2021, Nature Astronomy, 5
- Ratzloff, J., Kupfer, T., Barlow, B.N., Schneider, D., Marsh, T., Heber, U., et al., 2020, ApJ, 902, 92.
- Ratzloff, Barlow, Kupfer, Corcoran, et al., 2019, ApJ, 883, 51
- S. Geier, T. R. Marsh, B. Wang, B.H. Dunlap, B.N. Barlow, et al. 2013, A&A, 554, 54.
Light and radial velocity curves of the hot subdwarf + white dwarf binary HD 265435, a super-Chandrasekhar SN Ia progenitor. From Pelisoli et al. (2021).
Known verification binaries for LISA (black points), including HD 265435 (red point). From Pelisoli et al. (2021).
Known verification binaries for LISA (black points), including HD 265435 (red point). From Pelisoli et al. (2021).
TESS Observations of Compact Hot Subdwarf Binaries
Funded by NASA TESS GI Program Grants 80NSSC19K1720 & 80NSSC21K0364
Relevant Works
- Smith, B.A., Barlow, B.N., Rosenthal, B., Hermes, J.J., Schaffenroth, V. 2022, Astrophysical Journal, 939, 57.
- Barlow, B.N., Corcoran, K.A., Parker, I., Kupfer, T., Nemeth, P., Hermes, J.J., Lopez, I., Frondorf, W., Vestal, D., Holden, J. 2022, Astrophysical Journal, 928, 20.
- Van Grootel, V., Pozuelos, F.J., Thuillier, A., Charpinet, S., Delrez, L., Beck, M., Fortier, A., Hoyer, S., Sousa, S. G., Barlow, B. N., Billot, N., Dévora-Pajares, M., Østensen, R. H., and the CHEOPS team, 2021, A&A, 650, A205.
- Guidry, J.A., Hermes, J.J., Vanderbosch, Z.P., Barlow, B.N., et al., 2021, ApJ, 912, 125.
- Corcoran, K.A., Barlow, B.N., Hermes, J., Nemeth, P., Kupfer, T., Parker, I., Frondorf, W., Vestal, D., 2021, AAS Meeting Abstracts, 237, #5501.01
Normalized Gaia flux errors plotted against G magnitudes for all known hot subdwarf stars. Candidate variables show anomalously-high flux errors for their given magnitudes. From Barlow et al. (2022)
Folded TESS light curve of a new HW Vir binary discovered from the Gaia varindex method. From Barlow et al. (2022)
Folded TESS light curve of a new HW Vir binary discovered from the Gaia varindex method. From Barlow et al. (2022)
Evryscope Search for Compact Variables
Relevant Works
- Ratzloff, J., Kupfer, T., Barlow, B.N., Schneider, D., Marsh, T., Heber, U., et al., 2020, ApJ, 902, 92.
- Ratzloff, J., Barlow, B.N., Nemeth, P., Corbett, H.T., Walser, S.*, et al., 2020, ApJ, 890, 126.
- Ratzloff, Barlow, Kupfer, Corcoran, et al., 2019, ApJ, 883, 51
- Ratzloff, Corbett, Law, Barlow, et al., 2019, ApJ, 131, 08421
- Law, Fors, Ratzloff, Wulfken, et al. 2015, PASP, 127, 234.
Machine learning based classifiers used to select hot subdwarf candidates for Evryscope. The black contours result
from training data from known giants (red diamonds), main sequence
stars (green circles), and white dwarfs (blue stars). The hot
subdwarf (HSD) candidates are
shown as the yellow grouping.
Phase-folded Evyrscope light curve of HW Vir, the prototype eclipsing sdB+dM binary.
New Variable Hot Subdwarfs Identified from Gaia
Funded by NASA TESS GI
Relevant Works
Normalized Gaia flux errors plotted against G magnitudes for all known hot subdwarf stars. Candidate variables show anomalously-high flux errors for their given magnitudes.