Decoding the X-Ray Flare from MAXI J0709-159 Using Optical Spectroscopy and Multiepoch Photometry
- Title
- Decoding the X-Ray Flare from MAXI J0709-159 Using Optical Spectroscopy and Multiepoch Photometry
- Creator
- Bhattacharyya S.; Mathew B.; Ezhikode S.H.; Muneer S.; G. S.; G. M.; Arun R.; Anilkumar H.; Banerjee G.; Kumar S P.; Kartha S.S.; Paul K.T.; Velu C.
- Description
- We present a follow-up study on the recent detection of two X-ray flaring events by MAXI/Gas Slit Camera observations in soft and hard X-rays from MAXI J0709-159 in the direction of HD 54786 (LY CMa), on 2022 January 25. The X-ray luminosity during the flare was around 1037 erg s-1 (MAXI), which got reduced to 1032 erg s-1 (NuSTAR) after the flare. We took low-resolution spectra of HD 54786 from the 2.01 m Himalayan Chandra Telescope and the 2.34 m Vainu Bappu Telescope (VBT) facilities in India, on 2022 February 1 and 2. In addition to H? emission, we found emission lines of He i in the optical spectrum of this star. By comparing our spectrum of the object with those from the literature we found that He i lines show variability. Using photometric studies we estimate that the star has an effective temperature of 20,000 K. Although HD 54786 is reported as a supergiant in previous studies, our analysis favors it to be evolving off the main sequence in the color-magnitude diagram. We could not detect any infrared excess, ruling out the possibility of IR emission from a dusty circumstellar disk. Our present study suggests that HD 54786 is a Be/X-ray binary system with a compact object companion, possibly a neutron star. 2022. The Author(s). Published by the American Astronomical Society.
- Source
- Astrophysical Journal Letters, Vol-933, No. 2
- Date
- 2022-01-01
- Publisher
- American Astronomical Society
- Coverage
- Bhattacharyya S., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India; Mathew B., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India; Ezhikode S.H., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India; Muneer S., Indian Institute of Astrophysics, Koramangala, Bangalore, India; G. S., Indian Institute of Astrophysics, Koramangala, Bangalore, India; G. M., Indian Institute of Astrophysics, Koramangala, Bangalore, India; Arun R., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India, Indian Institute of Astrophysics, Koramangala, Bangalore, India; Anilkumar H., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India; Banerjee G., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India; Kumar S P., Indian Institute of Astrophysics, Koramangala, Bangalore, India; Kartha S.S., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India; Paul K.T., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bangalore, India; Velu C., Indian Institute of Astrophysics, Koramangala, Bangalore, India
- Rights
- All Open Access; Gold Open Access; Green Open Access
- Relation
- ISSN: 20418205
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Bhattacharyya S.; Mathew B.; Ezhikode S.H.; Muneer S.; G. S.; G. M.; Arun R.; Anilkumar H.; Banerjee G.; Kumar S P.; Kartha S.S.; Paul K.T.; Velu C., “Decoding the X-Ray Flare from MAXI J0709-159 Using Optical Spectroscopy and Multiepoch Photometry,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 24, 2025, https://archives.christuniversity.in/items/show/14957.