Aberfelds, A., A. Bartkiewicz, M. Szymczak, Šteinbergs, J., Surcis, G., A. Kobak, M. Durjasz, Shmeld, I., "Milliarcsecond structure and variability of methanol maser emission in three high-mass protostars" Mon. Not. R. Astron. Soc. 524 (2023), 599-618 DOI: 10.1093/mnras/stad1752
A. Kobak, A. Bartkiewicz, M. Szymczak, Olech, M., M. Durjasz, P. Wolak, Chibueze, J.O., Hirota, T., Eislöffel, J., Stecklum, B., Sobolev, A., Bayandina, O., Orosz, G., Burns, R. A., Kim, K.-T., van den Heever, S.P., "Multi-frequency VLBI observations of maser lines during the 6.7 GHz maser flare in the high-mass young stellar object G24.33+0.14 " Astron. Astrophys.671, id.A135 (2023), 1-26 DOI: 10.1051/0004-6361/202244772
2022
M. Durjasz, M. Szymczak, M. Olech, A. Bartkiewicz, " Discovery of recurrent flares of 6.7 GHz methanol maser emission in Cepheus A HW2" Astron. Astrophys. 663, id.A123 (2022), 1-16 DOI: 10.1051/0004-6361/202243552
M. Olech, M. Durjasz, M. Szymczak, A. Bartkiewicz, "Detection of periodic flares in 6.7 GHz methanol masers G45.804−0.356 and G49.043−1.079" Astron. Astrophys.661, id.A114 (2022), 1-7 DOI: 10.1051/0004-6361/202243108
Hirota, T., P. Wolak, Hunter, T.R., Brogan, C.L., A. Bartkiewicz, M. Durjasz, A. Kobak, Olech, M., M. Szymczak, Burns, R., i inni, "Millimeter methanol emission in the high-mass young stellar object G24.33+0.14 " Publ. Astron. Soc. Jap.74, Issue 5 (2022), 1234-1262 DOI: 10.1093/pasj/psac067
2021
M. Durjasz, M. Szymczak, P. Wolak, A. Bartkiewicz, "Observations of 12.2 GHz methanol masers towards northern high-mass protostellar objects" Astron. Astrophys.648,118D (2021), 1-13 DOI: 10.1051/0004-6361/202140385
2020
M. Szymczak, P. Wolak, A. Bartkiewicz, M. Aramowicz, M. Durjasz, "A search for the OH 6035 MHz line in high-mass star-forming regions" Astron. Astrophys.642, A145 (2020), 1-14 DOI: doi.org/10.1051/0004-6361/202039009
M. Olech, M. Szymczak, P. Wolak, E. Gérard, A. Bartkiewicz, "Long-term multi-frequency maser observations of the intermediate-mass young stellar object G107.298+5.639" Astron. Astrophys.634, A41 (2020), 1-18 DOI: doi.org/10.1051/0004-6361/201936943
A. Bartkiewicz, A. Sanna, M. Szymczak, L. Moscadelli, H.J. van Langevelde, P. Wolak, "The nature of the methanol maser ring G23.657–00.127 II. Expansion of the maser structure" Astron. Astrophys.637, A15 (2020), 1-12 DOI: doi.org/10.1051/0004-6361/202037562
M. Olech, M. Szymczak, P. Wolak, R. Sarniak, A. Bartkiewicz, "6.7GHz variability characteristics of new periodic methanol maser sources" Mon. Not. R. Astron. Soc. 486 (2019), 1236-1254 DOI: doi.org/10.1093/mnras/stz926
M. Durjasz, M. Szymczak, M. Olech, "A highly variable methanol maser in G111.256–0.770" Mon. Not. R. Astron. Soc. 485 (2019), 777-783 DOI: doi.org/10.1093/mnras/stz472
F. Rajabi, M. Houde, A. Bartkiewicz, M. Olech, M. Szymczak, P. Wolak, "New evidence for Dicke’s superradiance in the 6.7 GHz methanol spectral line in the interstellar medium " Mon. Not. R. Astron. Soc. 484 (2019), 1590-1597 DOI: doi.org/10.1093/mnras/stz074
P. Wolak, M. Olech, M. Szymczak, A. Bartkiewicz, M. Durjasz, "Reappearance of methanol maser flare in G24.33+0.14" ATel13080 (2019), 1-1
2018
A. Bartkiewicz, A. Sanna, M. Szymczak, L. Moscadelli, H. Langevelde, "Expansion of methanol maser rings" IAU S33613 (2018), 211-214 DOI: 10.1017/S1743921317010055
M. Szymczak, M. Olech, P. Wolak, E. Gerard, A. Bartkiewicz, "Giant burst of methanol maser in S255IR-NIRS3" Astron. Astrophys.617, A80 (2018), 1-9 DOI: 10.1051/0004-6361/201833443
P. Wolak, M. Szymczak, M. Olech, A. Bartkiewicz, "Global outburst of methanol maser in G24.33+0.14" IAU S33613 (2018), 319-320 DOI: 10.1017/S1743921317009930
M. Olech, M. Szymczak, P. Wolak, A. Bartkiewicz, "Monitoring and search for periodic methanol masers" IAU S33613 (2018), 313-314 DOI: 10.1017/S1743921317010080
M. Szymczak, M. Olech, R. Sarniak, P. Wolak, A. Bartkiewicz, "Monitoring observations of 6.7 GHz methanol masers" Mon. Not. R. Astron. Soc. 474 (2018), 219- 253 DOI: doi:10.1093/mnras/stx2693
M. Szymczak, M. Olech, R. Sarniak, P. Wolak, A. Bartkiewicz, "On the origin of methanol maser variability: Clues from long-term monitoring" IAU S33613 (2018), 41-44 DOI: 10.1017/S1743921317010523
P. Wolak, M. Szymczak, "Spectroscopy of astrophysical maser lines with the Torun 32m radio telescope" IEEE Baltic URSI Symp. Conf. Rec.1 (2018), 355-357 DOI: 10.23919/URSI.2018.8406760
R. Sarniak, M. Szymczak, A. Bartkiewicz, "Statistical analysis of the physical properties of the 6.7 GHz methanol maser features based on VLBI data" IAU S33613 (2018), 321-322 DOI: 10.1017/S1743921317009425
A. Bartkiewicz, M. Szymczak, "Study unreachable — Imaging the milliarcsecond structures of the methanol masers using the European VLBI Network" IEEE Baltic URSI Symp. Conf. Rec.1 (2018), 41-44 DOI: 10.23919/URSI.2018.8406759
2016
M. Szymczak, M. Olech, P. Wolak, A. Bartkiewicz, M. Gawroński, "Discovery of periodic and alternating flares of the methanol and water masers in G107.298+5.639 " Mon. Not. R. Astron. Soc. 459 (2016), 56-60 DOI: doi:10.1093/mnrasl/slw044
A. Bartkiewicz, M. Szymczak, Huib van Langevelde, "European VLBI Network imaging of 6.7 GHz methanol masers" Astron. Astrophys.587, A104 (2016), 1-25 DOI: 10.1051/0004-6361/201527541
2015
M. Szymczak, P. Wolak, A. Bartkiewicz, "Discovery of four periodic methanol masers and updated light curve for a further one" Mon. Not. R. Astron. Soc. 448 (2015), 2284-2293 DOI: 10.1093/mnras/stv145
2014
M. Szymczak, P. Wolak, A. Bartkiewicz, "6.7 GHz methanol maser variability in Cepheus A" Mon. Not. R. Astron. Soc. 439 (2014), 407-415 DOI: 10.1093/mnras/stu019
A. Bartkiewicz, M. Szymczak, H. van Langevelde, "European VLBI Network observations of 6.7 GHz methanol masers in clusters of massive young stellar objects" Astron. Astrophys.564, A110 (2014), 1-22 DOI: 10.1051/0004-6361/201322629
P. Wolak, M. Szymczak, Eric Gerard, "Long-term polarimetric observations of OH127.8+0.0" Mon. Not. R. Astron. Soc. 430 (2013), 2499-2509 DOI: 10.1093/mnras/stt075
P. Wolak, M. Szymczak, A. Bartkiewicz, E. Pazderski, A. Kus, A. Kępa, K. Katarzyński, K. Borkowski, R. Feiler, J. Mazurek, W. Szymański, J. Filarecki, "Reappearance of 22 GHz water maser in proto-planetary nebula OH17.7-2.0." ATel5211 (2013), 1-1
2012
A. Bartkiewicz, M. Szymczak, Huib van Langevelde, "Milliarcsecond structure of water maser emission in two young high-mass stellar objects associated with methanol masers" Astron. Astrophys.541, A72 (2012), 1-9 DOI: http://dx.doi.org/10.1051/0004-6361/201218999
James De Buizer, A. Bartkiewicz, M. Szymczak, "Testing the Hypothesis that Methanol Maser Rings Trace Circumstellar Disks: High-resolution Near-infrared and Mid-infrared Imaging" Astrophys. J. 754, Issue 2, article id.149 (2012), 1-15 DOI: 10.1088/0004-637X/754/2/149
James De Buizer, A. Bartkiewicz, M. Szymczak, "The infrared environment of methanol maser rings at high spatial resolution" IAUS No. 287287 (2012), 151-155 DOI: 10.1017/S1743921312006825
M. Szymczak, P. Wolak, A. Bartkiewicz, K. Borkowski, "The Torun catalogue of 6.7 GHz methanol masers" Astron. Nachr. 333, Issue 7 (2012), 634-639 DOI: 10.1002/asna.201211702
2011
M. Szymczak, P. Wolak, A. Bartkiewicz, H. van Langevelde, "Periodic variability of 6.7 GHz methanol masers in G22.357+0.066" Astron. Astrophys.531, L3 (2011), 1-6 DOI: 10.1051/0004-6361/201117145
A. Bartkiewicz, M. Szymczak, Y. Pihlstrom, H. van Langevelde, A. Brunthaler, M. Reid, "VLA observations of water masers towards 6.7 GHz methanol maser sources" Astron. Astrophys.525, A120 (2011), 1-17 DOI: 10.1051/0004-6361/201015235
2009
A. Bartkiewicz, M. Szymczak, H. van Langevelde, A.M.S. Richards, Y.M. Pihlstrom, "The diversity of methanol maser morphologies from VLBI observations" Astron. Astrophys.502 (2009), 155-173 DOI: 10.1051/0004-6361/200912250
2008
A. Bartkiewicz, A. Brunthaler, M. Szymczak, H. van Langevelde, M.J. Reid, " The nature of the methanol maser ring G23.657-00.127. I. The distance through trigonometric parallax measurements" Astron. Astrophys.490 (2008), 787-792 DOI: 10.1051/0004-6361:200810470
2007
M. Szymczak, A. Bartkiewicz, A.M.S. Richards, "A multi-transition molecular line study of candidate massive young stellar objects associated with methanol masers" Astron. Astrophys.468 (2007), 617-625 DOI: 10.1051/0004-6361:20077289
A. Bartkiewicz, H. van Langevelde, M. Szymczak, A. Brunthaler, "G23.657-0.127, what can we learn from a perfect methanol maser source?" IAUS242 (2007), 190-191 DOI: 10.1017/S174392130701294X
A. Bartkiewicz, M. Szymczak, H. van Langevelde, "Methanol masers and massive star formation" IAUS237 (2007), 395-395 DOI: 10.1017/S1743921307001834
M. Szymczak, A. Bartkiewicz, A.M.S. Richards, "Towards constraining the environments of methanol masers" IAUS242 (2007), 192-193 DOI: 10.1017/S1743921307012951
2005
A. Bartkiewicz, M. Szymczak, R.J. Cohen, A.M.S. Richards, "Magnetic field in Cepheus A as deduced from OH maser polarimetric observations" Mon. Not. R. Astron. Soc. 361 (2005), 623-632 DOI: 10.1111/j.1365-2966.2005.09203.x
A. Bartkiewicz, M. Szymczak, H. van Langevelde, "Ring shaped 6.7 GHz methanol maser emission around a young high-mass star" Astron. Astrophys.442 (2005), 61-64 DOI: 10.1051/0004-6361:200500190
2004
A. Bartkiewicz, M. Szymczak, R.J. Cohen, A.M.S. Richards, "Spatial and velocity coincidence of 4765- and 1720-MHz OH masers in two star-forming regions Cep A and W75N" Mon. Not. R. Astron. Soc. 350 (2004), 1409-1415 DOI: 10.1111/j.1365-2966.2004.07735.x