Search Results - "Valtonen, M."

IL-6 and other biomarkers as predictors of severity in COVID-19 by Broman, N., Rantasärkkä, K., Feuth, T., Valtonen, M., Waris, M., Hohenthal, U., Rintala, E., Karlsson, A., Marttila, H., Peltola, V., Vuorinen, T., Oksi, J.

“…Cytokine release syndrome is suggested to be the most important mechanism triggering acute respiratory distress syndrome and end organ damage in COVID-19. The…”
Get full text

The 2020 April–June super-outburst of OJ 287 and its long-term multiwavelength light curve with Swift: binary supermassive black hole and jet activity by Komossa, S, Grupe, D, Parker, M L, Valtonen, M J, Gómez, J L, Gopakumar, A, Dey, L

“…ABSTRACT We report detection of a very bright X-ray–UV–optical outburst of OJ 287 in 2020 April–June, the second brightest since the beginning of our Swift…”
Get full text

On the masses of OJ287 black holes by Valtonen, M. J., Ciprini, S., Lehto, H. J.

“…Abstract Two multifrequency campaigns were carried out on OJ287 in 2005: in April when it was in its pre-outburst state, and in November during the main 12 yr…”
Get full text

Gargantuan chaotic gravitational three-body systems and their irreversibility to the Planck length by Boekholt, T C N, Portegies Zwart, S F, Valtonen, M

“…ABSTRACT Chaos is present in most stellar dynamical systems and manifests itself through the exponential growth of small perturbations. Exponential divergence…”
Get full text

Stability of hierarchical triples – I. Dependence on inner eccentricity and inclination by Mylläri, A, Valtonen, M, Pasechnik, A, Mikkola, S

“…Abstract In simulations it is often important to decide if a given hierarchical triple star system is stable over an extended period of time. We introduce a…”
Get full text

X-ray spectral components of the blazar and binary black hole candidate OJ 287 (2005–2020) by Komossa, S, Grupe, D, Parker, M L, Gómez, J L, Valtonen, M J, Nowak, M A, Jorstad, S G, Haggard, D, Chandra, S, Ciprini, S, Dey, L, Gopakumar, A, Hada, K, Markoff, S, Neilsen, J

“…ABSTRACT We present a comprehensive analysis of all XMM–Newton spectra of OJ 287 spanning 15 yr of X-ray spectroscopy of this bright blazar. We also report the…”
Get full text

A massive binary black-hole system in OJ 287 and a test of general relativity by Valtonen, M. J, Lehto, H. J, Nilsson, K, Heidt, J, Takalo, L. O, Sillanpää, A, Villforth, C, Kidger, M, Poyner, G, Pursimo, T, Zola, S, Wu, J.-H, Zhou, X, Sadakane, K, Drozdz, M, Koziel, D, Marchev, D, Ogloza, W, Porowski, C, Siwak, M, Stachowski, G, Winiarski, M, Hentunen, V.-P, Nissinen, M, Liakos, A, Dogru, S

“…Tests of Einstein's general theory of relativity have mostly been carried out in weak gravitational fields where the space-time curvature effects are…”
Get full text

Short time-scale periodicity in OJ 287 by Pihajoki, P., Valtonen, M., Ciprini, S.

“…We have studied short-term variations of the blazar OJ 287, suspected to host a supermassive black hole binary. In this study, we use a two-season optical…”
Get full text

The Host Galaxy of OJ 287 Revealed by Optical and Near-infrared Imaging by Nilsson, K., Kotilainen, J., Valtonen, M., Gomez, J. L., Castro-Tirado, A. J., Drozdz, M., Gopakumar, A., Jeong, S., Kidger, M., Komossa, S., Mathur, S., Park, I. H., Reichart, D. E., Zola, S.

“…The BL Lacertae object OJ 287 (z = 0.306) has unique double-peaked optical outbursts every ∼12 yr, and it presents one of the best cases for a small-separation…”
Get full text

Exploring the causal link between circulating cytokines and sarcopenia traits: A Mendelian randomization analysis by Di, Wang, Luyao, Yang, Chengwei, Yang, Valtonen, Anu M., Juha‐Pekka, Kulmala, Ying, Gao

“…Background Previous observational studies have linked circulating cytokines to sarcopenia, but their causal relationship remains unclear. This study employed…”
Get full text

Testing the 1995 Binary Black Hole Model of OJ287 by Valtonen, M. J, Lehto, H. J, Takalo, L. O, Sillanpää, A

“…In 1995, a binary black hole model was proposed for the quasar OJ287, where the smaller secondary black hole impacts the accretion disk of the primary black…”
Get full text

MOMO – V. Effelsberg, Swift, and Fermi study of the blazar and supermassive binary black hole candidate OJ 287 in a period of high activity by Komossa, S, Grupe, D, Kraus, A, Gonzalez, A, Gallo, L C, Valtonen, M J, Laine, S, Krichbaum, T P, Gurwell, M A, Gómez, J L, Ciprini, S, Myserlis, I, Bach, U

“…ABSTRACT We report results from our ongoing project MOMO (Multiwavelength Observations and Modelling of OJ 287). In this latest publication of a sequence, we…”
Get full text

Distance to NGC 253 based on the planetary nebula luminosity function by Rekola, R., Richer, M. G., McCall, Marshall L., Valtonen, M. J., Kotilainen, J. K., Flynn, Chris

“…We identify a sample of 14 planetary nebulae in the nearby starburst disc galaxy NGC 253, using broad- and narrow-band imaging. A simple model of the stellar…”
Get full text

Predicting the Next Outbursts of OJ 287 in 2006-2010 by Valtonen, M. J, Lehto, H. J, Sillanpää, A, Nilsson, K, Mikkola, S, Hudec, R, Basta, M, Teräsranta, H, Haque, S, Rampadarath, H

“…In its nearly regular cycle of outbursts the quasar OJ 287 is due for another outburst season in 2006-2010. The prediction for the exact timing depends on the…”
Get full text

Role of physical activity in the relationship between recovery from work and insomnia among early childhood education and care professionals: a cross-sectional study by Karihtala, Tiina, Puttonen, Sampsa, Valtonen, Anu M, Kautiainen, Hannu, Hopsu, Leila, Heinonen, Ari

“…ObjectivesThis study aimed to investigate the association between recovery from work and insomnia and the role of objectively measured leisure-time physical…”
Get full text

Relationship between occupational and leisure-time physical activity and the need for recovery after work by Karihtala, Tiina, Valtonen, Anu M, Kautiainen, Hannu, Hopsu, Leila, Halonen, Janne, Heinonen, Ari, Puttonen, Sampsa

“…Health benefits of physical activity are very well acknowledged but the role of both occupational physical activity (OPA) and leisure time physical activity…”
Get full text

Transgenerational effects of parental larval diet on offspring development time, adult body size and pathogen resistance in Drosophila melanogaster by Valtonen, Terhi M, Kangassalo, Katariina, Pölkki, Mari, Rantala, Markus J

“…Environmental conditions experienced by parents are increasingly recognized to affect offspring performance. We set out to investigate the effect of parental…”
Get full text

Testing the Black Hole No-hair Theorem with OJ287 by Valtonen, M. J, Mikkola, S, Lehto, H. J, Gopakumar, A, Hudec, R, Polednikova, J

“…We examine the ability to test the black hole no-hair theorem at the 10% level in this decade using the binary black hole in OJ287. In the test we constrain…”
Get full text

Project MOMO: Multiwavelength Observations and Modeling of OJ 287 by Komossa, S., Grupe, D., Kraus, A., Gallo, L. C., Gonzalez, A. G., Parker, M. L., Valtonen, M. J., Hollett, A. R., Bach, U., Gómez, J. L., Myserlis, I., Ciprini, S.

“…Our project MOMO (Multiwavelength observations and modeling of OJ 287) consists of dedicated, dense, long-term flux and spectroscopic monitoring, and deep…”
Get full text

PRECURSOR FLARES IN OJ 287 by PIHAJOKI, P, Valtonen, M, Zola, S, Liakos, A, Drozdz, M, Winiarski, M, OGLOZA, W, KOZIEL-WIERZBOWSKA, D, Provencal, J, Nilsson, K

“…We have studied three most recent precursor flares in the light curve of the blazar OJ 287 while invoking the presence of a processing binary black hole in the…”
Get full text