Zobrazeno 1 - 10
of 9 952
pro vyhledávání: '"A Kostov"'
Autor:
Nascimento, Fellype do, Petroski, Kleber Alexandre, Nishime, Thalita Mayumi Castaldelli, Kostov, Konstantin Georgiev
Atmospheric pressure plasma jets (APPJs) are versatile devices with numerous applications. This work focuses on APPJs generated at the tip of long, flexible tubes using the jet transfer technique. The plasma source consists of a primary discharge and
Externí odkaz:
http://arxiv.org/abs/2410.17003
Autor:
Kostov, Veselin B., Rappaport, Saul A., Borkovits, Tamas, Powell, Brian P., Gagliano, Robert, Omohundro, Mark, Biro, Imre B., Moe, Max, Howell, Steve B., Mitnyan, Tibor, Clark, Catherine A., Kristiansen, Martti H., Terentev, Ivan A., Schwengeler, Hans M., Pal, Andras, Vanderburg, Andrew
Publikováno v:
2024, Astrophysical Journal, 974, 25
We have discovered a triply eclipsing triple-star system, TIC 290061484, with the shortest known outer period, Pout, of only 24.5 days. This "eclipses" the previous record set by lambda Tauri at 33.02 days, which held for 68 yr. The inner binary, wit
Externí odkaz:
http://arxiv.org/abs/2410.01711
Autor:
Mantovan, G., Wilson, T. G., Borsato, L., Zingales, T., Biazzo, K., Nardiello, D., Malavolta, L., Desidera, S., Marzari, F., Cameron, A. Collier, Nascimbeni, V., Majidi, F. Z., Montalto, M., Piotto, G., Stassun, K. G., Winn, J. N., Jenkins, J. M., Mignon, L., Bieryla, A., Latham, D. W., Barkaoui, K., Collins, K. A., Evans, P., Fausnaugh, M. M., Granata, V., Kostov, V., Mann, A. W., Pozuelos, F. J., Radford, D. J., Relles, H. M., Rowden, P., Seager, S., Tan, T. -G., Timmermans, M., Watkins, C. N.
Recent observations of giant planets have revealed unexpected bulk densities. Hot Jupiters, in particular, appear larger than expected for their masses compared to planetary evolution models, while warm Jupiters seem denser than expected. These diffe
Externí odkaz:
http://arxiv.org/abs/2409.07520
Autor:
Jayaraman, Rahul, Rappaport, Saul, Powell, Brian, Handler, Gerald, Omohundro, Mark, Gagliano, Robert, Kostov, Veselin, Fuller, Jim, Kurtz, Donald, Zhang, Valencia, Ricker, George
The Transiting Exoplanet Survey Satellite (TESS) has enabled the discovery of numerous tidally tilted pulsators (TTPs), which are pulsating stars in close binaries where the presence of a tidal bulge has the effect of tilting the primary star's pulsa
Externí odkaz:
http://arxiv.org/abs/2409.03815
Autor:
Wang, Xian-Yu, Rice, Malena, Wang, Songhu, Kanodia, Shubham, Dai, Fei, Logsdon, Sarah E., Schweiker, Heidi, Teske, Johanna K., Butler, R. Paul, Crane, Jeffrey D., Shectman, Stephen A., Quinn, Samuel N., Kostov, Veselin B., Osborn, Hugh P., Goeke, Robert F., Eastman, Jason D., Shporer, Avi, Rapetti, David, Collins, Karen A., Watkins, Cristilyn, Relles, Howard M., Ricker, George R., Seager, Sara, Winn, Joshua N., Jenkins, Jon M.
The stellar obliquity distribution of warm-Jupiter systems is crucial for constraining the dynamical history of Jovian exoplanets, as the warm Jupiters' tidal detachment likely preserves their primordial obliquity. However, the sample size of warm-Ju
Externí odkaz:
http://arxiv.org/abs/2408.10038
Autor:
Ghachoui, M., Rackham, B. V., Dévora-Pajares, M., Chouqar, J., Timmermans, M., Kaltenegger, L., Sebastian, D., Pozuelos, F. J., Eastman, J. D., Burgasser, A. J., Murgas, F., Stassun, K. G., Gillon, M., Benkhaldoun, Z., Palle, E., Delrez, L., Jenkins, J. M., Barkaoui, K., Narita, N., de Leon, J. P., Mori, M., Shporer, A., Rowden, P., Kostov, V., Fűrész, G., Collins, K. A., Schwarz, R. P., Charbonneau, D., Guerrero, N. M., Ricker, G., Jehin, E., Fukui, A., Kawai, Y., Hayashi, Y., Esparza-Borges, E., Parviainen, H., Clark, C. A., Ciardi, D. R., Polanski, A. S., Schleider, J., Gilbert, E. A., Crossfield, I. J. M., Barclay, T., Dressing, C. D., Karpoor, P. R., Softich, E., Gerasimov, R., Davoudi, F.
Publikováno v:
A&A 690, A263 (2024)
We present the validation of two TESS super-Earth candidates transiting the mid-M dwarfs TOI-6002 and TOI-5713 every 10.90 and 10.44 days, respectively. The first star (TOI-6002) is located $32.038\pm0.019$ pc away, with a radius of $0.2409^{+0.0066}
Externí odkaz:
http://arxiv.org/abs/2408.00709
Autor:
Solanki, Siddhant, Cieplak, Agnieszka M., Schnittman, Jeremy, Baker, John G., Barclay, Thomas, Barry, Richard K., Kostov, Veselin, Kruse, Ethan, Olmschenk, Greg, Powell, Brian P., Silva, Stela Ishitani, Torres, Guillermo
We identify $240$ short-period ($P \lesssim 10$ days) binary systems in the TESS data, $180$ of which are heartbeat binaries (HB). The sample is mostly a mix of A and B-type stars and primarily includes eclipsing systems, where over $30\%$ of the sou
Externí odkaz:
http://arxiv.org/abs/2407.14421
Autor:
Montalto, M., Greco, N., Biazzo, K., Desidera, S., Andreuzzi, G., Bieryla, A., Bignamini, A., Bonomo, A. S., Briceño, C., Cabona, L., Cosentino, R., Damasso, M., Fiorenzano, A., Fong, W., Goeke, B., Hesse, K. M., Kostov, V. B., Lanza, A. F., Latham, D. W., Law, N., Mancini, L., Maggio, A., Molinaro, M., Mann, A. W., Mantovan, G., Naponiello, L., Nardiello, D., Nascimbeni, V., Pagano, I., Pedani, M., Safonov, B. S., Scandariato, G., Seager, S., Singh, V., Sozzetti, A., Strakhov, I. A., Winn, J. N., Ziegler, C., Zingales, T.
Aims. We report the confirmation of a new transiting exoplanet orbiting the star TOI-5076. Methods. We present our vetting procedure and follow-up observations which led to the confirmation of the exoplanet TOI-5076b. In particular, we employed high-
Externí odkaz:
http://arxiv.org/abs/2405.18950
Autor:
Kostov, Vladimir Petrov
We consider polynomials $Q:=\sum _{j=0}^da_jx^j$, $a_j\in \mathbb{R}^*$, with all roots real. When the {\em sign pattern} $\sigma (Q):=({\rm sgn}(a_d),{\rm sgn}(a_{d-1})$, $\ldots$, ${\rm sgn}(a_0))$ has $\tilde{c}$ sign changes, the polynomial $Q$ h
Externí odkaz:
http://arxiv.org/abs/2405.18895
Autor:
Kostov, Vladimir Petrov
Publikováno v:
Modern Mathematical Methods 2(2) 2024, p. 103-116
We study real univariate polynomials with non-zero coefficients and with all roots real, out of which exactly two positive. The sequence of coefficients of such a polynomial begins with $m$ positive coefficients followed by $n$ negative followed by $
Externí odkaz:
http://arxiv.org/abs/2404.13943