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Study of chemically peculiar stars - I. High-resolution spectroscopy and K2 photometry of Am stars in the region of M44. / Joshi, Santosh; Trust, Otto; Semenko, E.; Williams, P. E.; Lampens, P.; De Cat, P.; Vermeylen, L.; Holdsworth, D. L.; García, R. A.; Mathur, S.; Santos, A. R.G.; Mkrtichian, D.; Goswami, A.; Cuntz, M.; Yadav, A. P.; Sarkar, M.; Bhatt, B. C.; Aliçavuş, F. Kahraman; Nhlapo, M. D.; Lund, M. N.; Goswami, P. P.; Savanov, I.; Jorissen, A.; Jurua, E.; Avvakumova, E.; Dmitrienko, E. S.; Chakradhari, N. K.; Das, M. K.; Chowdhury, S.; Abedigamba, O. P.; Yakunin, I.; Letarte, B.; Karinkuzhi, D.

In: Monthly Notices of the Royal Astronomical Society, Vol. 510, No. 4, 01.03.2022, p. 5854-5871.

Research output: Contribution to journalArticlepeer-review

Harvard

Joshi, S, Trust, O, Semenko, E, Williams, PE, Lampens, P, De Cat, P, Vermeylen, L, Holdsworth, DL, García, RA, Mathur, S, Santos, ARG, Mkrtichian, D, Goswami, A, Cuntz, M, Yadav, AP, Sarkar, M, Bhatt, BC, Aliçavuş, FK, Nhlapo, MD, Lund, MN, Goswami, PP, Savanov, I, Jorissen, A, Jurua, E, Avvakumova, E, Dmitrienko, ES, Chakradhari, NK, Das, MK, Chowdhury, S, Abedigamba, OP, Yakunin, I, Letarte, B & Karinkuzhi, D 2022, 'Study of chemically peculiar stars - I. High-resolution spectroscopy and K2 photometry of Am stars in the region of M44', Monthly Notices of the Royal Astronomical Society, vol. 510, no. 4, pp. 5854-5871. https://doi.org/10.1093/mnras/stab3158

APA

Joshi, S., Trust, O., Semenko, E., Williams, P. E., Lampens, P., De Cat, P., Vermeylen, L., Holdsworth, D. L., García, R. A., Mathur, S., Santos, A. R. G., Mkrtichian, D., Goswami, A., Cuntz, M., Yadav, A. P., Sarkar, M., Bhatt, B. C., Aliçavuş, F. K., Nhlapo, M. D., ... Karinkuzhi, D. (2022). Study of chemically peculiar stars - I. High-resolution spectroscopy and K2 photometry of Am stars in the region of M44. Monthly Notices of the Royal Astronomical Society, 510(4), 5854-5871. https://doi.org/10.1093/mnras/stab3158

Vancouver

Joshi S, Trust O, Semenko E, Williams PE, Lampens P, De Cat P et al. Study of chemically peculiar stars - I. High-resolution spectroscopy and K2 photometry of Am stars in the region of M44. Monthly Notices of the Royal Astronomical Society. 2022 Mar 1;510(4):5854-5871. https://doi.org/10.1093/mnras/stab3158

Author

Joshi, Santosh ; Trust, Otto ; Semenko, E. ; Williams, P. E. ; Lampens, P. ; De Cat, P. ; Vermeylen, L. ; Holdsworth, D. L. ; García, R. A. ; Mathur, S. ; Santos, A. R.G. ; Mkrtichian, D. ; Goswami, A. ; Cuntz, M. ; Yadav, A. P. ; Sarkar, M. ; Bhatt, B. C. ; Aliçavuş, F. Kahraman ; Nhlapo, M. D. ; Lund, M. N. ; Goswami, P. P. ; Savanov, I. ; Jorissen, A. ; Jurua, E. ; Avvakumova, E. ; Dmitrienko, E. S. ; Chakradhari, N. K. ; Das, M. K. ; Chowdhury, S. ; Abedigamba, O. P. ; Yakunin, I. ; Letarte, B. ; Karinkuzhi, D. / Study of chemically peculiar stars - I. High-resolution spectroscopy and K2 photometry of Am stars in the region of M44. In: Monthly Notices of the Royal Astronomical Society. 2022 ; Vol. 510, No. 4. pp. 5854-5871.

BibTeX

@article{b0b510094c8847b4af3325cae7252401,
title = "Study of chemically peculiar stars - I. High-resolution spectroscopy and K2 photometry of Am stars in the region of M44",
abstract = "We present a study based on the high-resolution spectroscopy and K2 space photometry of five chemically peculiar stars in the region of the open cluster M44. The analysis of the high-precision photometric K2 data reveals that the light variations in HD 73045 and HD 76310 are rotational in nature and caused by spots or cloud-like co-rotating structures, which are non-stationary and short-lived. The time-resolved radial velocity measurements, in combination with the K2 photometry, confirm that HD 73045 does not show any periodic variability on time-scales shorter than 1.3 d, contrary to previous reports in the literature. In addition to these new rotational variables, we discovered a new heartbeat system, HD 73619, where no pulsational signatures are seen. The spectroscopic and spectropolarimetric analyses indicate that HD 73619 belongs to the peculiar Am class, with either a weak or no magnetic field, considering the 200-G detection limit of our study. The least-squares deconvolution profiles for HD 76310 indicate a complex structure in its spectra, suggesting that this star is either part of a binary system or surrounded by a cloud shell. When placed in the Hertzsprung-Russell diagram, all studied stars are evolved from the main sequence and situated in the δScuti instability strip. This work is relevant for further detailed studies of chemically peculiar stars, for example on inhomogeneities (including spots) in the absence of magnetic fields and the origin of the pulsational variability in heartbeat systems. ",
keywords = "Polarimetric, Spectroscopic, Stars: Activity, Stars: Binaries, Stars: Chemically peculiar, Techniques: Photometric",
author = "Santosh Joshi and Otto Trust and E. Semenko and Williams, {P. E.} and P. Lampens and {De Cat}, P. and L. Vermeylen and Holdsworth, {D. L.} and Garc{\'i}a, {R. A.} and S. Mathur and Santos, {A. R.G.} and D. Mkrtichian and A. Goswami and M. Cuntz and Yadav, {A. P.} and M. Sarkar and Bhatt, {B. C.} and Ali{\c c}avu{\c s}, {F. Kahraman} and Nhlapo, {M. D.} and Lund, {M. N.} and Goswami, {P. P.} and I. Savanov and A. Jorissen and E. Jurua and E. Avvakumova and Dmitrienko, {E. S.} and Chakradhari, {N. K.} and Das, {M. K.} and S. Chowdhury and Abedigamba, {O. P.} and I. Yakunin and B. Letarte and D. Karinkuzhi",
note = "Publisher Copyright: {\textcopyright} 2022 The Author(s).",
year = "2022",
month = mar,
day = "1",
doi = "10.1093/mnras/stab3158",
language = "English",
volume = "510",
pages = "5854--5871",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Wiley-Blackwell",
number = "4",

}

RIS

TY - JOUR

T1 - Study of chemically peculiar stars - I. High-resolution spectroscopy and K2 photometry of Am stars in the region of M44

AU - Joshi, Santosh

AU - Trust, Otto

AU - Semenko, E.

AU - Williams, P. E.

AU - Lampens, P.

AU - De Cat, P.

AU - Vermeylen, L.

AU - Holdsworth, D. L.

AU - García, R. A.

AU - Mathur, S.

AU - Santos, A. R.G.

AU - Mkrtichian, D.

AU - Goswami, A.

AU - Cuntz, M.

AU - Yadav, A. P.

AU - Sarkar, M.

AU - Bhatt, B. C.

AU - Aliçavuş, F. Kahraman

AU - Nhlapo, M. D.

AU - Lund, M. N.

AU - Goswami, P. P.

AU - Savanov, I.

AU - Jorissen, A.

AU - Jurua, E.

AU - Avvakumova, E.

AU - Dmitrienko, E. S.

AU - Chakradhari, N. K.

AU - Das, M. K.

AU - Chowdhury, S.

AU - Abedigamba, O. P.

AU - Yakunin, I.

AU - Letarte, B.

AU - Karinkuzhi, D.

N1 - Publisher Copyright: © 2022 The Author(s).

PY - 2022/3/1

Y1 - 2022/3/1

N2 - We present a study based on the high-resolution spectroscopy and K2 space photometry of five chemically peculiar stars in the region of the open cluster M44. The analysis of the high-precision photometric K2 data reveals that the light variations in HD 73045 and HD 76310 are rotational in nature and caused by spots or cloud-like co-rotating structures, which are non-stationary and short-lived. The time-resolved radial velocity measurements, in combination with the K2 photometry, confirm that HD 73045 does not show any periodic variability on time-scales shorter than 1.3 d, contrary to previous reports in the literature. In addition to these new rotational variables, we discovered a new heartbeat system, HD 73619, where no pulsational signatures are seen. The spectroscopic and spectropolarimetric analyses indicate that HD 73619 belongs to the peculiar Am class, with either a weak or no magnetic field, considering the 200-G detection limit of our study. The least-squares deconvolution profiles for HD 76310 indicate a complex structure in its spectra, suggesting that this star is either part of a binary system or surrounded by a cloud shell. When placed in the Hertzsprung-Russell diagram, all studied stars are evolved from the main sequence and situated in the δScuti instability strip. This work is relevant for further detailed studies of chemically peculiar stars, for example on inhomogeneities (including spots) in the absence of magnetic fields and the origin of the pulsational variability in heartbeat systems.

AB - We present a study based on the high-resolution spectroscopy and K2 space photometry of five chemically peculiar stars in the region of the open cluster M44. The analysis of the high-precision photometric K2 data reveals that the light variations in HD 73045 and HD 76310 are rotational in nature and caused by spots or cloud-like co-rotating structures, which are non-stationary and short-lived. The time-resolved radial velocity measurements, in combination with the K2 photometry, confirm that HD 73045 does not show any periodic variability on time-scales shorter than 1.3 d, contrary to previous reports in the literature. In addition to these new rotational variables, we discovered a new heartbeat system, HD 73619, where no pulsational signatures are seen. The spectroscopic and spectropolarimetric analyses indicate that HD 73619 belongs to the peculiar Am class, with either a weak or no magnetic field, considering the 200-G detection limit of our study. The least-squares deconvolution profiles for HD 76310 indicate a complex structure in its spectra, suggesting that this star is either part of a binary system or surrounded by a cloud shell. When placed in the Hertzsprung-Russell diagram, all studied stars are evolved from the main sequence and situated in the δScuti instability strip. This work is relevant for further detailed studies of chemically peculiar stars, for example on inhomogeneities (including spots) in the absence of magnetic fields and the origin of the pulsational variability in heartbeat systems.

KW - Polarimetric

KW - Spectroscopic

KW - Stars: Activity

KW - Stars: Binaries

KW - Stars: Chemically peculiar

KW - Techniques: Photometric

UR - http://www.scopus.com/inward/record.url?scp=85125121841&partnerID=8YFLogxK

U2 - 10.1093/mnras/stab3158

DO - 10.1093/mnras/stab3158

M3 - Article

AN - SCOPUS:85125121841

VL - 510

SP - 5854

EP - 5871

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 4

ER -

ID: 96879939